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Advances in OptoElectronics
Journal Prestige (SJR): 0.141

Number of Followers: 6

This is an Open Access Journal

Open Access journal
ISSN (Print) 1687-563X - ISSN (Online) 1687-5648
Published by Hindawi

[339 journals]

Impact of the Four-Sideband and Two-Sideband Theories in Designing of
Fiber Optical Parametric Amplifiers
- Abstract: In this paper, we seek to compare the two design theories for fiber optical parametric amplifier through simulation. The two-sideband method (standard method) has been the most widely used method in fiber optical parametric amplifier design, but it does not predict the gain shrinkage around the pumps. This technique does not consider the gain shrinking dynamics around the pump(s). The four-sideband analytical technique is an alternative technique for fiber optical parametric amplifier design, and it allows for a simplified investigation of the gain shrinking dynamics around the pump(s) due to the interaction of the various arising high-order idlers within the vicinity of the pump waves. The undertaking in this paper is to present a dual-pump fiber amplifier based on the highly nonlinear fiber and another one based on the photonic crystal fiber and ascertain if gain shrinking affects both FOPAs.
  PubDate: Mon, 07 Oct 2019 10:05:03 +000
1D Confocal Broad Area Semiconductor Lasers (Confocal BALs) for
Fundamental Transverse Mode Selection (TMS#0)
- Abstract: Previously in this journal we have reported on fundamental transverse mode selection (TMS#0) of broad area semiconductor lasers (BALs) with integrated twice-retracted 4f set-up and film-waveguide lens as the Fourier-transform element. Now we choose and report on a simpler approach for BAL-TMS#0, i.e., the use of a stable confocal longitudinal BAL resonator of length L with a transverse constriction. The absolute value of the radius R of curvature of both mirror-facets convex in one dimension (1D) is R = L = 2f with focal length f. The round trip length 2L = 4f again makes up for a Fourier-optical 4f set-up and the constriction resulting in a resonator-internal beam waist stands for a Fourier-optical low-pass spatial frequency filter. Good TMS#0 is achieved, as long as the constriction is tight enough, but filamentation is not completely suppressed.
  PubDate: Mon, 17 Jun 2019 10:05:04 +000

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