Subjects -> PHYSICS (Total: 857 journals)
    - ELECTRICITY AND MAGNETISM (10 journals)
    - MECHANICS (22 journals)
    - NUCLEAR PHYSICS (53 journals)
    - OPTICS (92 journals)
    - PHYSICS (625 journals)
    - SOUND (25 journals)
    - THERMODYNAMICS (30 journals)

OPTICS (92 journals)

Showing 1 - 90 of 90 Journals sorted alphabetically
ACS Photonics     Hybrid Journal   (Followers: 16)
Advanced Optical Materials     Hybrid Journal   (Followers: 12)
Advanced Photonics     Open Access   (Followers: 7)
Advanced Photonics Research     Open Access   (Followers: 5)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 23)
Advances in Nonlinear Optics     Open Access   (Followers: 8)
Advances in Optical Technologies     Open Access   (Followers: 3)
Advances in Optics     Open Access   (Followers: 11)
Advances in Optics and Photonics     Full-text available via subscription   (Followers: 16)
Annual Review of Vision Science     Full-text available via subscription   (Followers: 5)
Applied Optics     Hybrid Journal   (Followers: 49)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 33)
Atmospheric and Oceanic Optics     Hybrid Journal   (Followers: 8)
Biomedical Optics Express     Open Access   (Followers: 7)
Biomedical Photonics     Open Access  
Chinese Optics Letters     Full-text available via subscription   (Followers: 8)
EPJ Photovoltaics     Open Access   (Followers: 2)
European Journal of Hybrid Imaging     Open Access  
Fiber and Integrated Optics     Hybrid Journal   (Followers: 22)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 3)
High Power Laser Science and Engineering     Open Access   (Followers: 4)
Hindsight : The Journal of Optometry History     Open Access   (Followers: 1)
IEEE Photonics Journal     Open Access   (Followers: 18)
IEEE Photonics Technology Letters     Hybrid Journal   (Followers: 15)
International Journal of Optics     Open Access   (Followers: 15)
International Journal of Optics and Applications     Open Access   (Followers: 7)
International Journal of Optoelectronic Engineering     Open Access   (Followers: 1)
International Journal of Spectroscopy     Open Access   (Followers: 6)
International Journal of Sustainable Lighting     Open Access  
Journal of Astronomical Telescopes, Instruments, and Systems     Hybrid Journal   (Followers: 6)
Journal of Atomic, Molecular, and Optical Physics     Open Access   (Followers: 12)
Journal of Biomedical Photonics & Engineering     Open Access  
Journal of Laser Applications     Full-text available via subscription   (Followers: 14)
Journal of Mass Spectrometry and Advances in the Clinical Lab     Open Access   (Followers: 2)
Journal of Modern Optics     Hybrid Journal   (Followers: 12)
Journal of Nanoelectronics and Optoelectronics     Full-text available via subscription   (Followers: 1)
Journal of Nonlinear Optical Physics & Materials     Hybrid Journal   (Followers: 2)
Journal of Optical Microsystem     Hybrid Journal   (Followers: 2)
Journal of Optical Technology     Full-text available via subscription   (Followers: 4)
Journal of Optics     Hybrid Journal   (Followers: 14)
Journal of Optics Applications     Open Access   (Followers: 14)
Journal of Optoelectronics Engineering     Open Access   (Followers: 5)
Journal of Photonics     Open Access   (Followers: 5)
Journal of Photonics for Energy     Hybrid Journal   (Followers: 1)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 32)
Journal of the Optical Society of America A     Hybrid Journal   (Followers: 11)
Journal of the Optical Society of America B     Hybrid Journal   (Followers: 12)
Journal of the Optical Society of Korea     Open Access   (Followers: 2)
Laser & Photonics Reviews     Hybrid Journal   (Followers: 5)
Laser Physics     Hybrid Journal   (Followers: 2)
Lasers in Medical Science     Hybrid Journal   (Followers: 2)
LEUKOS : The Journal of the Illuminating Engineering Society     Hybrid Journal  
Materials Today Electronics     Open Access   (Followers: 5)
Microwave and Optical Technology Letters     Hybrid Journal   (Followers: 10)
Nature Photonics     Full-text available via subscription   (Followers: 38)
Ophthalmic and Physiological Optics     Hybrid Journal   (Followers: 4)
Optica     Open Access   (Followers: 6)
Optical and Quantum Electronics     Hybrid Journal   (Followers: 5)
Optical Engineering     Hybrid Journal   (Followers: 22)
Optical Fiber Technology     Hybrid Journal   (Followers: 9)
Optical Materials     Hybrid Journal   (Followers: 10)
Optical Materials : X     Open Access  
Optical Materials Express     Open Access   (Followers: 7)
Optical Memory and Neural Networks     Hybrid Journal   (Followers: 2)
Optical Nanoscopy     Open Access   (Followers: 1)
Optical Review     Hybrid Journal   (Followers: 2)
Optics & Laser Technology     Hybrid Journal   (Followers: 27)
Optics and Lasers in Engineering     Hybrid Journal   (Followers: 36)
Optics and Photonics Journal     Open Access   (Followers: 17)
Optics and Photonics Letters     Open Access   (Followers: 11)
Optics and Photonics News     Partially Free   (Followers: 7)
Optics and Spectroscopy     Hybrid Journal   (Followers: 8)
Optics Communications     Hybrid Journal   (Followers: 17)
Optics Express     Open Access   (Followers: 23)
Optics Letters     Hybrid Journal   (Followers: 19)
Optik     Hybrid Journal   (Followers: 10)
Optik & Photonik     Open Access  
Optoelectronics Letters     Hybrid Journal   (Followers: 1)
Photochem     Open Access   (Followers: 17)
Photonic Sensors     Open Access   (Followers: 7)
Photonics     Open Access   (Followers: 3)
Photonics Letters of Poland     Open Access  
Photonics Research     Open Access   (Followers: 1)
PhotonicsViews     Hybrid Journal  
Progress in Optics     Full-text available via subscription   (Followers: 6)
Results in Optics     Open Access   (Followers: 18)
SIAM Journal on Imaging Sciences     Hybrid Journal   (Followers: 7)
Thin Solid Films     Hybrid Journal   (Followers: 10)
Trends in Opto-Electro & Optical Communications     Full-text available via subscription   (Followers: 1)
Virtual Journal for Biomedical Optics     Hybrid Journal   (Followers: 1)
Similar Journals
Journal Cover
Applied Physics B: Lasers and Optics
Journal Prestige (SJR): 0.74
Citation Impact (citeScore): 2
Number of Followers: 33  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0946-2171 - ISSN (Online) 1432-0649
Published by Springer-Verlag Homepage  [2468 journals]
  • A laser diagnostic for lineshape-based gas temperature and pressure
           measurements targeting a single atomic potassium absorption transition

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      Abstract: Abstract A single-line laser absorption diagnostic technique has been developed for rapid measurements of temperature and pressure in high-enthalpy gas environments. This technique targets atomic potassium via the absorption lineshape of the D2 transition near 766.7 nm. Potassium is a convenient spectroscopic target because it has strong resonance transitions, is naturally occurring in many experimental facilities, and is active in the near-infrared where robust and cost-effective optical equipment is easily available. The approach was tested and validated at a measurement rate of 50 kHz in a shock tube at conditions ranging from 800–3600 K and 0.04–1 atm. Collisional broadening coefficients for potassium vapor in argon and in nitrogen were extended to this temperature range. The approach is most sensitive to pressure at low temperatures and high pressures, where the lineshape is most Lorentzian in form; conversely, it is most sensitive to temperature at high temperatures and low pressures where the lineshape is most Gaussian in form. At intermediate temperatures and pressures, it is sensitive to both quantities. Measurement uncertainties were as low as 6% in temperature and pressure. The technique can also be extended to other species for developing similar single-line diagnostics sensitive to different regions in temperature and pressure space.
      PubDate: 2024-06-10
       
  • Multi-pass enhanced photoacoustic sensor for open gas sensing

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      Abstract: Abstract In this paper, a photoacoustic trace gas sensor based on a multi-pass enhanced open spherical photoacoustic cell (M-OPAC) was developed. A high-performance spherical photoacoustic (PA) cell was specially designed with high resonant frequency for suppressing various environmental noises, and integrated with a Herriot-type multi-pass optical system for enhancing PA signal. For evaluating the developed PA sensor system, details of theoretical simulation and experimental test were investigated for ambient water vapor (H2O) detection by utilizing a DFB diode laser with a central wavelength of 1391 nm, and wavelength modulation spectroscopy with second harmonic (WMS-2f) detection technique was employed. Compared to the conventional single-pass PA detection strategy, the developed multi-pass PA sensor shows a sensitivity enhancement of 4.3 times and demonstrates a good immunity to ambient noises. Moreover, the developed spherical open photoacoustic cell can be used for open monitoring of atmospheric adsorbent gases, which indicates a great potential for in-site and real-time gas monitoring without complex gas sampling procedures.
      PubDate: 2024-06-08
       
  • Direct generation of orthogonally polarized dual-wavelength double pulse
           Pr: YLF visible laser

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      Abstract: Abstract This paper presents a flexible method for directly generating an orthogonally polarized dual-wavelength double pulse Pr: YLF visible laser. A theoretical model is established to reveal the oscillation mechanism of the orthogonally polarized dual-wavelength double pulse laser. Theoretical results demonstrate that the ratio of orthogonally polarized dual-wavelength laser intensity and master-slave pulse energy, along with the time delay between the master and slave pulses, can be controlled by the insertion angle of the acousto-optic element and the double step losses of the signal generator. These theoretical results have been verified in experiments. We obtained a maximum output power of 145 mW for the orthogonally polarized dual-wavelength double pulse laser, with π-polarization at 604 nm and σ-polarization at 607 nm. At a pulse repetition frequency (PRF) of 10 kHz, the pulse widths of the master and slave pulses are measured to be 29.6 ns and 65.4 ns, respectively.
      PubDate: 2024-06-07
       
  • Switchable multi-wavelength Pr:YLF laser based on F-P etalon

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      Abstract: Abstract We established a theoretical model of the multi-wavelength Pr:YLF laser at 604 nm, 607 nm and 639 nm based on the F-P etalon and studied the influence of the F-P etalon insertion angle on the threshold power of different wavelength lasers. The theoretical results show that by adjusting the insertion angle of a single F-P etalon, direct visible multi-wavelength laser output with different combinations can be achieved. Based on the guidance of theoretical parameters, we obtained maximum output powers of 729 mW, 420 mW, 382 mW, and 269 mW for single-wavelength at 639 nm, dual-wavelength at 604 nm&639 nm, 607 nm&639 nm, and triple-wavelength at 604 nm&607 nm&639 nm lasers, respectively, in the experiment. The experimental results agree well with the simulation. This method effectively simplifies the resonator structure and improves the conversion efficiency, providing a theoretical basis for guiding and optimizing the design of multi-wavelength laser. Such a visible multi-wavelength integrated laser source will have potential applications in fields such as laser medicine, color displays, and deep ultraviolet generation.
      PubDate: 2024-06-06
       
  • Temporal and photon number resolution of superconducting nanowire
           single-photon detectors

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      Abstract: Abstract Single-photon detectors based on superconducting nanowires (SNSPDs) are promising technologies with good comprehensive performance, especially their excellent temporal resolution for applications in quantum precision measurements and time-varying ultimate detection. The response time of an SNSPD can be characterized by aspects of hotspot thermal relaxation and electrical relaxation, which are also responsible for the time jitter of the SNSPD. The factors affecting the temporal resolution of an SNSPD, the underlying physical mechanism, the intrinsic limit, and possible optimization methods are reviewed. The poor energy resolution and lack of photon number resolution for conventional SNSPDs can be overcome by using high-impedance readouts, novel device structures, characterization methods and, most importantly, SNSPD arrays, which can simultaneously further improve the temporal resolution. The study of the temporal and photon number resolution of SNSPDs helps reveal the underlying physics and is valuable for their new application in various practical engineering areas.
      PubDate: 2024-06-05
       
  • Theoretical and experimental investigations on idler-resonant intracavity
           KTA OPO pumped by a dual-loss-modulated Q-switched laser with AOM and
           Ta2NiS5 nanosheets

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      Abstract: Abstract Ta2NiS5 nanosheets were fabricated and analyzed for their microstructures and nonlinear optical responses. As a saturable absorber (SA), Ta2NiS5 was integrated into an idler-resonant KTiOAsO4 (KTA)-based intracavity optical parametric oscillator (IOPO) pumped by a dual-loss-modulated Q-switched YVO4/Nd:YVO4 laser. At an incident pump power of 18.9 W and an acousto-optic modulator (AOM) modulation rate of 4 kHz, the maximum output powers of 467 mW for the signal wave and 228 mW for the idler wave were achieved, corresponding to an overall optical-to-optical conversion efficiency of 3.68%. Remarkably, the shortest measured pulse widths of 872 ps for the signal wave and 2.86 ns for the idler wave were obtained, corresponding to the highest peak powers of 392 kW and 57.6 kW for the signal and idler waves, respectively. In comparison to the IOPO pumped by a singly Q-switched YVO4/Nd:YVO4 laser (SIOPO) with an AOM, the IOPO pumped by a doubly Q-switched YVO4/Nd:YVO4 laser (DIOPO) with an AOM and a Ta2NiS5 SA can generate signal and idler waves with significantly shorter pulse widths and higher peak powers. Additionally, the coupled rate equations for the idler-resonant DIOPO were given. The numerical simulations exhibited remarkable consistency with the experimental results.
      PubDate: 2024-06-05
       
  • The research on the effect of dynamic tilt variation on the phase of cold
           atomic gravimeter

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      Abstract: Abstract In recent years, absolute gravity comparison experiments between cold atomic gravimeter and traditional gravimeter have been carried out by combining cold atomic gravimeter with stable platform. Due to the working characteristics of the stable platform, the tilt angle of the cold atomic gravimeter will change slightly in the process of dynamic measurement, and the measurement noise will be introduced. In order to improve the accuracy of dynamic measurement, this paper first analyzes the trajectory of the mirror and atom in the atomic gravimeter combined with carrier motion information, obtains the phase expression of the atomic interferometer using the translation and rotation matrix, evaluates the main terms of the gravity deviation using the 20-min navigation data on the ship in the South China Sea, and simplifies the higher-order small-terms in the main terms to deduce the simplified form of the gravity deviation. Then, the Fourier transform is used to transform the simplified expression into the power spectrum expression of phase noise, the corresponding noise sensitivity function is used in the form of trigonometric. The 20-min data is divided into 10 intervals, the root-mean-square (RMS) value of the overall gravity deviation is 1.5–3 mGal using the power spectrum of the platform angle, angular velocity and carrier acceleration in each interval. The variation fluctuation of the RMS value is consistent with the fluctuation of solving the gravity deviation through the trajectory. The conclusion provides the calculation method of gravity noise caused by dynamic tilt change and horizontal acceleration, and also provides the basis for platform design.
      PubDate: 2024-06-04
       
  • High-order harmonic generation in a doped semiconductor by inhomogeneous
           laser field

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      Abstract: Abstract High order harmonic generation has emerged as a reliable method in spectroscopy, production of high frequency light and attosecond pulses. Since its inception, gases has been extensively used as the target medium. The gas target has constrained the applications of high order harmonic due to production of low harmonic yield thus the need to explore solid target. However, high order harmonic generation in solid has not been fully characterized since they are not synonymous to gas-phase. Here, we study the influence of doping and inhomogeneity of the laser field on high order harmonic generation in a semiconductor. We have theoretically investigated the high-order harmonic generation of the doped semiconductor in an inhomogeneous laser field. The results show that the high-order harmonic generation process can be effectively controlled. The harmonic spectrum is characterized by two plateau structures; first and second plateau. In the second plateau harmonic intensity was boosted on introduction of a dopant by approximately one to three orders in the homogeneous field. In addition, the impact of inhomogeneity parameter and doping rate is investigated. The results show that by altering the inhomogeneity values and the doping rate high harmonic orders can be effectively increased. From the study, its demonstrated that control of semiconductor high order harmonic generation can be achieved by controlling the dopant, doping rate as well as the laser field. Moreover, the harmonic yield is greatly enhanced. Since the generation process encodes material characteristic, the harmonics can give insight about target structure.
      PubDate: 2024-06-01
       
  • Noncollinear phase matching and effective nonlinear coefficient
           calculations for biaxial crystal out of the principal plane

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      Abstract: Abstract The essential factor in laser frequency conversion involves phase matching within nonlinear optical crystals. To our knowledge, few studies have investigated the noncollinear phase matching calculation for biaxial crystal out of the principal plane. In this paper, we propose an arbitrary direction phase matching model and a computational method based on gradient descent (GD) algorithm, which can be applied to noncollinear in the principal plane, collinear and noncollinear out of the principal plane. In the case of 1053 nm third harmonic generation (THG) in LiB3O5 (LBO) crystal, the phase matching conditions are converted into a system of nonlinear equations with six variables and six equations, which can be solved by iterative optimization search with the GD algorithm and includes type-I (ss-f) and type-II (fs-f). We reveal the relationship of phase matching angles and effective nonlinear coefficients ( \(d_{eff}\) ) for various structures. Our method uncovers the existence of many solutions in the non-principal plane with γ > 8° and the \(d_{eff}\) close to the maximum value 0.66834 pm/V at θ = 90°, φ = 141.84° and γ = 0. The resolution of the arbitrary direction phase matching problem holds significant importance, as it expands the possibilities for laser frequency conversion, especially for noncollinear structures.
      PubDate: 2024-05-30
       
  • Investigating quantum criticality and multipartite entanglement in the
           anisotropic XY model with staggered Dzyaloshinskii–Moriya interaction

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      Abstract: Abstract In this work, we utilize the quantum renormalization-group (QRG) method to investigate quantum phase transitions (QPT) in a one-dimensional anisotropic spin-1/2 XY model with Dzyaloshinskii–Moriya (DM) interaction. Within this model, it has been demonstrated that phase diagrams are influenced by both the anisotropy parameter and DM interaction strength. Particularly noteworthy is our identification of QPT in global entanglement (GE) and tripartite negativity as the number of QRG iterations increases, allowing for a clear distinction between the Spin-fluid and Néel phases. Additionally, both GE and tripartite negativity decrease with rising anisotropy parameter, eventually stabilizing. However, we have observed that the robustness of tripartite negativity exceeds that of GE. To gain deeper insights, we conduct a detailed analysis of the first derivative of GE, unveiling scaling and nonanalytic behavior at the critical point. Our findings provide crucial insights into multipartite entanglement dynamics in condensed matter systems, significantly advancing our understanding of the quantum critical properties in Heisenberg spin models.
      PubDate: 2024-05-29
       
  • Mid-infrared spectral properties and laser performance of bulk Tb-doped
           selenide glass

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      Abstract: Abstract Spectral characteristics and laser performance of a bulk Tb3+-doped selenide glass were studied at room and liquid nitrogen temperatures. Under pumping with a pulsed 2.94 μm Er: YAG laser the output energy up to 36 mJ at 5.25 μm and wavelength tuning within 5.05–5.55 μm spectral range were demonstrated.
      PubDate: 2024-05-28
       
  • Flying focus laser wake field acceleration by donut shape pulse

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      Abstract: Abstract Laser wake field acceleration (LWFA) is limited by some determinative aspects, such as wave breaking, dephasing, pulse divergence, etc. One of the proposed methods to overcome the acceleration limitations of the LWFA is spatio-temporal controlling of the laser focus, named flying focus. In this article, flying focus dynamics for two Bessel beam profiles is derived with complex source point method (CSPM). We investigate the two pulse with basic Gaussian and Donut-like profiles, those focal points move at a speed very close to the speed of light. Our selected flying focus parameters maintain laser intensity up to 16 times the Rayleigh length (− 8ZR, + 8ZR). We also examined the flying focus LWFA (FF-LWFA) energy gain and trapping rate for these two cases. Numerical results show that accelerated electron bunch is converged considerably for the Donut shape profile. This convergence is due to the inward radial ponderomotive force, and furthermore suitable phase difference between longitudinal and transverse wake field components. Since electrons are hold near the axis for a longer distance and keep more energy from the wake. In average 2.8% of the injected electrons are accelerated up to 255 MeV for the donut-like profiles, while only 1.4% of electrons are accelerated up to 155 MeV for Gaussian profile.
      PubDate: 2024-05-19
       
  • Continuous-waves generation induced by laser radiation dynamics in
           transparent medium with passively mode-locked saturable absorber

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      Abstract: Abstract The use of femtosecond laser radiation pulses is a very important tool used for metals or cell ablation, structural changes of materials optical properties and many other applications. In this light, we investigate on the generation of continuous-waves solitary structures induced by the dynamics of laser radiation propagation in transparent media with passively mode-locked saturable absober. Thus, understanding the characteristic properties of the dynamics of laser radiations turns out to be a pertinent and important step towards the optimization of their uses, as well as enhancement of tecnology. Our model is characterized by a complex Ginzburg–Landau (CGL) equation with a strong nonlinearity. In full nonlinear regime, numerical simulations of the nonlinear equation revealed multi-periodic wave structures which turn out to be multi-pulse trains. When the number of photon K increases, an increase of the Saturation Power influences considerably the pulse train. The results clearly prove the existence of multi-pulse structures and bound-state solitons with strong nonlinearity on-like cubic-quintic and saturable nonlinearities.
      PubDate: 2024-05-19
       
  • A comprehensive guide to intracavity absorption spectroscopy

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      Abstract: Abstract The enormous sensitivity of intracavity absorption spectroscopy (ICAS), as well as its unique ability to tolerate high broadband losses caused by, e.g., optical windows and light scattering, is being exploited by only a few research groups worldwide. The reason seems to be the lack of comprehensive literature, such that the field remains difficult to access for non-experts, in particular for engineers and chemists, who might derive the most benefits from applying ICAS. In particular, the missing connection to this target audience appears to be two-fold: (i) the seeming complexity of the theory, and (ii) the necessity to setup homemade laser systems. However, once some basic understanding and knowledge is obtained, both aspects appear to be of similar complexity as with other spectroscopic techniques. Therefore, the current work is aiming at (i) providing a comprehensive review of the theoretical basics of ICAS, and (ii) describing the most important practical aspects that need to be considered for a successful realization of ICAS measurements. To ensure maximum clarity, illustrative practical examples of recent work are used throughout the paper.
      PubDate: 2024-05-18
       
  • Synchronous detection of CO2 and CH4 gas absorption spectroscopy based on
           TDM and optimized adaptive Whittaker-Henderson filtering algorithm

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      Abstract: Abstract A cavity ring-down spectroscopy (CRDS) system based on the time-division multiplexing (TDM) and an improved Whittaker-Henderson (W-H) filtering algorithm was proposed to synchronous detect of methane (CH4) and carbon dioxide (CO2) gas absorption spectroscopy. The mechanical optical switch was used to quickly switch distributed feedback (DFB) lasers with different wavelengths in the optical path.And the adaptive W-H filtering algorithm combined with convolutional neural network (CNN) could quickly and accurately obtain the best weight parameters to achieve effective denoising of absorption spectrum.In addition, the gradient concentration of CH4 and CO2weredetected and the limit of detection (LOD) of CRDS system was studied.The results of experiment demonstrated that the system could detect CO2 and CH4 in real time and had good stability. Allan deviation analysis shows that the LOD of CH4 and CO2 are 8 ppb and 0.85 ppm under the average number of 1. The LOD of CH4 and CO2 can be optimized to 2 ppb and 0.16 ppm under the optimal average number. In short, the proposed system had high sensitivity, good stability and could measure various gases synchronously, which had important application potential in the field of gas monitoring.
      PubDate: 2024-05-18
       
  • Classification of precious Au-alloys using multivariate method assisted
           LIBS

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      Abstract: Abstract The present study describes the potential use of the Laser-induced breakdown spectroscopy (LIBS) coupled with the principle component analysis (PCA) for the discrimination/analysis of the precious gold alloy has been reported. It is very hard to discriminate between the Au-Alloys using conventional LIBS and it has been suggested that the use of multivariate methods assisted LIBS could solve the problem. Gold alloys of karats 18 K, 19 K, 20 K, 22 K, and 24 K with concentrations of 75, 79, 85, 93, and 99.9% have been tested and analyzed using LIBS. Plasma was generated on the surface of the target sample by focusing Nd: YAG laser under atmospheric pressure. Time-integrated emission spectra from plasma were collected in the range of 250–870 nm. The characteristic emission lines of constituents were identified using the NIST atomic spectra database. Normalized optical emission intensities of the detected elements were used as input data for principle component analysis (PCA). Five different three-dimensional clusters were observed, that belonged to five different karats of gold, suggesting the reliability of the model for the classification of precious alloy samples. The finding from this study showed that the LIBS coupled with PCA is an effective method for the classification of gold alloys with different percentages.
      PubDate: 2024-05-18
       
  • Two-dimensional temperature measurements in laser-induced air plasma

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      Abstract: Abstract Simultaneous measurements using two Intensified Charge-Coupled Device (ICCD) cameras with two bandpass filters on laser-induced air plasma have facilitated the illustration of a two-dimensional temperature distribution within the plasma. In each pixel, the intensity captured by the ICCD cameras could replace the intensity measurements using a spectrometer in the two-line ratio method for temperature measurement. The plasma was produced by a 532 nm pulse from a Q-switched neodymium-doped yttrium aluminum garnet laser. The two ICCD cameras with the two bandpass filters simultaneously captured the plasma to measure emission intensities at two wavelengths. The two-line ratio method using N II lines was applied in each pixel to examine the two-dimensional temperature distribution. Two laser energies and focal lengths were utilized to ensure spatially and temporally consistent temperature results considering the characteristics of the plasma temperature at the experiment conditions. The signal-to-noise ratio increased with increasing the incident energy and decreasing the focal length. The highest temperature was observed at the high incident energy and the short focal length. The location in the plasma with the maximum temperature varied over time. The temperature significantly reduced with time at the long focal length and low incident energy. The plasma temperature was measured using the two-line ratio method with a spectrometer. Average emission intensity images at the two wavelengths were used to examine the plasma temperature. The results of the three temperature measurement methods were compared to evaluate the accuracy of the methods. Generally, in the three methods, the temperature changes were similar along the x-axis of the plasma. The temperature difference between the two-filtered imaging method and the spectrometer was between 1 and 7%. The temperature difference between the average image method and the spectrometer was between 1 and 10%. The two-filtered imaging method simultaneously captures spectral emissions at two wavelengths and hence effectively shows a two-dimensional temperature distribution.
      PubDate: 2024-05-17
       
  • Influence of a magnetic field on the frequency of a laser stabilized to
           molecular iodine

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      Abstract: Abstract We report on the effect of a weak magnetic field applied on an iodine cell used to frequency stabilize a laser. A 1.5 \(\upmu \) m laser is frequency tripled in order to excite the molecular transitions at 0.51 \(\upmu \) m and frequency locked on a hyperfine line. With this frequency reference, we report short-term stability about \(3 \times 10^{-14}~\tau ^{-1/2}\) , with a minimum value of \(4 \times 10^{-15}\) at 200 s. The lower part of \(10^{-15}\) frequency stability domain is reached, in our case, only by adding an efficient magnetic shield around the sealed quartz iodine cell. In order to quantify the Zeeman effect, we applied magnetic fields of several \(\times 10^{-4}\)  T on the cell containing the iodine vapour. The Zeeman effect affects the lineshape transition in such a way that we observe a modification of the laser frequency. We have measured this linear Zeeman shift at \((1062\pm 6) \times 10^{4}\)  Hz/T for the a1 hyperfine component of the R(34) 44-0 transition, near 514 nm by applying a magnetic field along the cell. Thus, in case of uncontrolled magnetic fields of an order of magnitude of 1 \( \times 10^{-4}\)  T, the frequency stability is limited in the upper of the \(10^{-14}\) domain.
      PubDate: 2024-05-15
       
  • Comment on “Growth and characterization of unidirectional benzil single
           crystal for photonic applications”

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      Abstract: Abstract The benzil crystal has at room temperature symmetry with the space group P3121 without a polar axis, thus ferroelectricity cannot exist at RT. Unsaturated P-E hysteresis loop is due to dielectric loss not to ferroelectric properties. The large values of dielectric constant and dielectric loss measured for low frequencies are unreliable because the apparatus used gives erroneous results.
      PubDate: 2024-05-14
       
  • First thin-disk oscillator with ceramic Yb:LuScO3 in comparison to the
           operation with ceramic Yb:Lu2O3

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      Abstract: Abstract We report on the characterization and first laser operation of ceramic Yb:LuScO3 in a thin-disk oscillator. The optical performance achieved with a ceramic Yb:LuScO3 disk is compared to the one obtained with an existing ceramic Yb:Lu2O3 disk for reference. The characterization covers the measurement of the fluorescence spectra, the fluorescence lifetimes, and nomarsky imaging. The investigation on the laser operation covers the measurement of resonator losses, output powers, and thermal behavior during continuous-wave operation in a multimode thin-disk oscillator. An average output power of 149 W and a slope efficiency of 51.8% were achieved with the ceramic Yb:LuScO3 disk which reached a maximum surface temperature of about 150 °C. At the same temperature level, a disk made of the already established ceramic Yb:Lu2O3 delivered 957 W of output power with a slope efficiency of 75.7%.
      PubDate: 2024-05-14
       
 
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  Subjects -> PHYSICS (Total: 857 journals)
    - ELECTRICITY AND MAGNETISM (10 journals)
    - MECHANICS (22 journals)
    - NUCLEAR PHYSICS (53 journals)
    - OPTICS (92 journals)
    - PHYSICS (625 journals)
    - SOUND (25 journals)
    - THERMODYNAMICS (30 journals)

OPTICS (92 journals)

Showing 1 - 90 of 90 Journals sorted alphabetically
ACS Photonics     Hybrid Journal   (Followers: 16)
Advanced Optical Materials     Hybrid Journal   (Followers: 12)
Advanced Photonics     Open Access   (Followers: 7)
Advanced Photonics Research     Open Access   (Followers: 5)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 23)
Advances in Nonlinear Optics     Open Access   (Followers: 8)
Advances in Optical Technologies     Open Access   (Followers: 3)
Advances in Optics     Open Access   (Followers: 11)
Advances in Optics and Photonics     Full-text available via subscription   (Followers: 16)
Annual Review of Vision Science     Full-text available via subscription   (Followers: 5)
Applied Optics     Hybrid Journal   (Followers: 49)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 33)
Atmospheric and Oceanic Optics     Hybrid Journal   (Followers: 8)
Biomedical Optics Express     Open Access   (Followers: 7)
Biomedical Photonics     Open Access  
Chinese Optics Letters     Full-text available via subscription   (Followers: 8)
EPJ Photovoltaics     Open Access   (Followers: 2)
European Journal of Hybrid Imaging     Open Access  
Fiber and Integrated Optics     Hybrid Journal   (Followers: 22)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 3)
High Power Laser Science and Engineering     Open Access   (Followers: 4)
Hindsight : The Journal of Optometry History     Open Access   (Followers: 1)
IEEE Photonics Journal     Open Access   (Followers: 18)
IEEE Photonics Technology Letters     Hybrid Journal   (Followers: 15)
International Journal of Optics     Open Access   (Followers: 15)
International Journal of Optics and Applications     Open Access   (Followers: 7)
International Journal of Optoelectronic Engineering     Open Access   (Followers: 1)
International Journal of Spectroscopy     Open Access   (Followers: 6)
International Journal of Sustainable Lighting     Open Access  
Journal of Astronomical Telescopes, Instruments, and Systems     Hybrid Journal   (Followers: 6)
Journal of Atomic, Molecular, and Optical Physics     Open Access   (Followers: 12)
Journal of Biomedical Photonics & Engineering     Open Access  
Journal of Laser Applications     Full-text available via subscription   (Followers: 14)
Journal of Mass Spectrometry and Advances in the Clinical Lab     Open Access   (Followers: 2)
Journal of Modern Optics     Hybrid Journal   (Followers: 12)
Journal of Nanoelectronics and Optoelectronics     Full-text available via subscription   (Followers: 1)
Journal of Nonlinear Optical Physics & Materials     Hybrid Journal   (Followers: 2)
Journal of Optical Microsystem     Hybrid Journal   (Followers: 2)
Journal of Optical Technology     Full-text available via subscription   (Followers: 4)
Journal of Optics     Hybrid Journal   (Followers: 14)
Journal of Optics Applications     Open Access   (Followers: 14)
Journal of Optoelectronics Engineering     Open Access   (Followers: 5)
Journal of Photonics     Open Access   (Followers: 5)
Journal of Photonics for Energy     Hybrid Journal   (Followers: 1)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 32)
Journal of the Optical Society of America A     Hybrid Journal   (Followers: 11)
Journal of the Optical Society of America B     Hybrid Journal   (Followers: 12)
Journal of the Optical Society of Korea     Open Access   (Followers: 2)
Laser & Photonics Reviews     Hybrid Journal   (Followers: 5)
Laser Physics     Hybrid Journal   (Followers: 2)
Lasers in Medical Science     Hybrid Journal   (Followers: 2)
LEUKOS : The Journal of the Illuminating Engineering Society     Hybrid Journal  
Materials Today Electronics     Open Access   (Followers: 5)
Microwave and Optical Technology Letters     Hybrid Journal   (Followers: 10)
Nature Photonics     Full-text available via subscription   (Followers: 38)
Ophthalmic and Physiological Optics     Hybrid Journal   (Followers: 4)
Optica     Open Access   (Followers: 6)
Optical and Quantum Electronics     Hybrid Journal   (Followers: 5)
Optical Engineering     Hybrid Journal   (Followers: 22)
Optical Fiber Technology     Hybrid Journal   (Followers: 9)
Optical Materials     Hybrid Journal   (Followers: 10)
Optical Materials : X     Open Access  
Optical Materials Express     Open Access   (Followers: 7)
Optical Memory and Neural Networks     Hybrid Journal   (Followers: 2)
Optical Nanoscopy     Open Access   (Followers: 1)
Optical Review     Hybrid Journal   (Followers: 2)
Optics & Laser Technology     Hybrid Journal   (Followers: 27)
Optics and Lasers in Engineering     Hybrid Journal   (Followers: 36)
Optics and Photonics Journal     Open Access   (Followers: 17)
Optics and Photonics Letters     Open Access   (Followers: 11)
Optics and Photonics News     Partially Free   (Followers: 7)
Optics and Spectroscopy     Hybrid Journal   (Followers: 8)
Optics Communications     Hybrid Journal   (Followers: 17)
Optics Express     Open Access   (Followers: 23)
Optics Letters     Hybrid Journal   (Followers: 19)
Optik     Hybrid Journal   (Followers: 10)
Optik & Photonik     Open Access  
Optoelectronics Letters     Hybrid Journal   (Followers: 1)
Photochem     Open Access   (Followers: 17)
Photonic Sensors     Open Access   (Followers: 7)
Photonics     Open Access   (Followers: 3)
Photonics Letters of Poland     Open Access  
Photonics Research     Open Access   (Followers: 1)
PhotonicsViews     Hybrid Journal  
Progress in Optics     Full-text available via subscription   (Followers: 6)
Results in Optics     Open Access   (Followers: 18)
SIAM Journal on Imaging Sciences     Hybrid Journal   (Followers: 7)
Thin Solid Films     Hybrid Journal   (Followers: 10)
Trends in Opto-Electro & Optical Communications     Full-text available via subscription   (Followers: 1)
Virtual Journal for Biomedical Optics     Hybrid Journal   (Followers: 1)
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