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Photonics Letters of Poland
Journal Prestige (SJR): 0.25

Number of Followers: 0

This is an Open Access Journal

Open Access journal
ISSN (Print) 2080-2242 - ISSN (Online) 2080-2242
Published by Photonics Society of Poland

[1 journal]

Multiphoton scanning laser microscope based on femtosecond fiber laser
- Authors: Alicja Kwaśny, Jakub Bogusławski, Grzegorz Soboń
  Pages: 74 - 76
  Abstract: We present a multiphoton scanning laser microscope based on a femtosecond frequency-doubled erbium-doped fiber laser. The laser used in the epi-illumination microscope setup generated 95 fs pulses at the wavelength of 780 nm with 44.3 mW average power at 100 MHz pulse repetition rate. The imaging process was controlled by custom software developed in the NI LabVIEW environment. Detection of two-photon fluorescence was proven by acquiring a series of images from various biological samples.
  
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  PubDate: 2022-12-31
  DOI: 10.4302/plp.v14i4.1182
  Issue No: Vol. 14, No. 4 (2022)
Prediction of LED luminaire spectral power distribution using a
mathematical model developed based on interpolation method
- Authors: Roman Sikora, Przemysław Markiewicz, Andrzej Pawlak
  Pages: 77 - 79
  Abstract: LED luminaires with controllable luminous flux are increasingly used, mainly due to the need to reduce electricity consumption, which is the equivalent of improving the energy efficiency of a lighting installation. Changing the dimming level changes the spectral power distribution of the luminaire or light source. Knowledge of dimming characteristics including spectral power distribution relationships provides the opportunity to optimize control algorithms and predict the impact of lighting parameters on the work surface. The paper presents a mathematical model to calculate the spectral power distribution of an LED luminaire for any level of dimming. Two interpolation methods were used to develop the model, fitted by polynomial functions and spline functions. Validation of the model was performed for two values of control voltage-dimming levels.
  
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  PubDate: 2022-12-31
  DOI: 10.4302/plp.v14i4.1177
  Issue No: Vol. 14, No. 4 (2022)
Polymer tapered pillar on a fiber end fabricated by UV irradiation using a
high-NA fiber
- Authors: Taiga Kurisawa, Yoshiki Kamiura, Chiemi Fujikawa, Osamu Mikami
  Pages: 80 - 82
  Abstract: The increasing need for single-mode fibers (SMFs) and advances in silicon photonics (SiPh) devices have led to the need for an efficient method of optical coupling between them. To achieve a higher coupling between them, a polymer tapered pillar was fabricated on the end face of the SMF by applying the optical diffraction effect and a self-written waveguide technology using a high numerical aperture (HiNA) fiber. The initial 10.4 µm spot size was reduced to 4.17 µm at 1.55 µm wavelength, and the greatest coupling efficiency of –1.01 dB was reached between an SMF with a tapered pillar and uncured resin cladding and a HiNA fiber.
  
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  P. Yin, J.R. Serafini, Z. Su, R. Shiue, E. Timurdogan, M.L. Fanto, S. Preble, "Low connector-to-connector loss through silicon photonic chips using ultra-low loss splicing of SMF-28 to high numerical aperture fibers", Opt. Expr. 27, 24188 (2019). CrossRef
  https://coherentinc.force.com/Coherent/UHNA3'cclcl=en_US, (18/09/2022). DirectLink
  PubDate: 2022-12-31
  DOI: 10.4302/plp.v14i4.1179
  Issue No: Vol. 14, No. 4 (2022)
Matrix data analysis methods for applications in laser beam position
measurement modules
- Authors: Grzegorz Budzyń, Jedrzej Baranski, Janusz Rzepka
  Pages: 83 - 85
  Abstract: This paper addresses the problem of selecting an optimal algorithm suitable for real-time processing of matrix sensor data in laser beam positioning applications. We compare four different algorithms and prove that the chosen one provides the same results in time by several orders of magnitude lower and with negligible memory consumption, making it suitable for use in microcontroller-based sensing modules.
  
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  PubDate: 2022-12-31
  DOI: 10.4302/plp.v14i4.1181
  Issue No: Vol. 14, No. 4 (2022)
The ripple-curry amplifier in photonic applications
- Authors: Marian Gilewski
  Pages: 86 - 88
  Abstract: This paper discusses the new design of a amplifier for the miniature MEMS-type spectrometer. The application problem of the new amplifier was the correct conditioning of the sensor's photoelectric pulses. The processed signal was a sequence of pulses that had variable both frequency and amplitude value. Thus, such a broadband amplifier should have the functionality of automatic gain control. This paper describes the concept of the new circuit, develops its detailed application, and then performs validation tests. Measurement results of the new circuit are discussed in the final section of the paper.
  
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  PubDate: 2022-12-31
  DOI: 10.4302/plp.v14i4.1187
  Issue No: Vol. 14, No. 4 (2022)