Results 11 to 20 of about 299,834 (255)
Frontiers in Physics, 2021 Self-mixing interference (SMI) in terahertz quantum cascade lasers (THz QCLs) is one of the significant approaches for coherent THz imaging and sensing techniques.
Lei Ge +8 more
doaj +1 more source
Theoretical investigation of amplified spontaneous emission in an active structure by extended (3×3)transfer matrix formalism: the case of a non-uniform longitudinal distribution of emitters [PDF]
Journal of the European Optical Society-Rapid Publications, 2006 We use an extended (3×3) Transfer Matrix Formalism (TMF) to investigate the properties of Amplified Spontaneous Emission (ASE) in an active structure that exhibits a non-uniform spatial distribution of emitters along its longitudinal axis.
Boucher Yann G.
doaj +1 more source
Purely Gain-Coupled Distributed-Feedback Bragg Semiconductor Laser Diode Emitting at 770 nm
Applied Sciences, 2021 The transition lines of Mg, K, Fe, Ni, and other atoms lie near 770 nm, therefore, this spectral region is important for helioseismology, solar atmospheric studies, the pumping of atomic clocks, and laser gyroscopes.
Chunkao Ruan +9 more
doaj +1 more source
Numerical simulation of a DFB - fiber laser sensor (part 1) [PDF]
INCAS Bulletin, 2010 This paper presents the preliminary results obtained in developing a numerical simulationanalysis of fiber optic bending sensitivity aiming to improve the design of fiber lasers.
Dan SAVASTRU +2 more
doaj +1 more source
Control of Emission Characteristics of Perovskite Lasers through Optical Feedback
Advanced Photonics Research, 2021 Recent progress on perovskite lasers has shown the large potential for such materials to become a basis for commercially available microlasers in the near feature.
Alexander Palatnik +6 more
doaj +1 more source
Photonics, 2022 We present our theoretical model and experimental results on the extreme linewidth narrowing of an erbium-doped fiber distributed feedback (DFB) laser due to an additional random DFB via Rayleigh backscattering in a long single-mode fiber connected to ...
Mikhail I. Skvortsov +8 more
doaj +1 more source
Powerful narrow linewidth random fiber laser
Photonic Sensors, 2016 In this paper, we demonstrate a narrow linewidth random fiber laser, which employs a tunable pump laser to select the operating wavelength for efficiency optimization, a narrow-band fiber Bragg grating (FBG) and a section of single mode fiber to ...
Jun Ye +3 more
doaj +1 more source
Communication-Efficient Distributed SGD with Error-Feedback, Revisited
International Journal of Computational Intelligence Systems, 2021 We show that the convergence proof of a recent algorithm called dist-EF-SGD for distributed stochastic gradient descent with communication efficiency using error-feedback of Zheng et al., Communication-efficient distributed blockwise momentum SGD with ...
Tran Thi Phuong, Le Trieu Phong
doaj +1 more source
Photonics, 2016 We present the current status of high-performance, compact, THz sources based on intracavity nonlinear frequency generation in mid-infrared quantum cascade lasers.
Quanyong Lu, Manijeh Razeghi
doaj +1 more source
Applied Sciences, 2019 Optical microcavities have been widely used in nonlinear optics, quantum optics, and laser technologies. Here we demonstrate the self-injection locking of a distributed feedback diode laser using home-made high-finesse Fabry-Perot microcavity.
Xing Wei, ZhenDa Xie, Shi-Ning Zhu
doaj +1 more source