Results 11 to 20 of about 1,583,518 (339)

Self-Mixing Signal Characteristics of Complex-Coupled Distributed-Feedback Terahertz Quantum-Cascade Lasers

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, Ning Yang, Jian Wang, Weidong Chu, Suqing Duan, Yan Xie, Yingxin Wang, Lianhe Li, Edmund Linfield   +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, Yongyi Chen, Li Qin, Peng Jia, Yugang Zeng, Yue Song, Yuxin Lei, Zhijun Zhang, Nan Zhang, Zaijin Li   +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, Sorin MICLOŞ, Ion LĂNCRĂNJAN   +2 more
doaj   +1 more source

Random Distributed Feedback Fiber Laser [PDF]

Optics and Photonics News, 2010
Peer ...
Turitsyn, S. K., Babin, S.A., El-Taher, A. E., Harper, Paul, Churkin, D. V., Kablukov, S. I., Ania Castañón, Juan Diego, Karalekas, Vasileios, Podivilov, E.V.   +8 more
openaire   +2 more sources

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, Changsoon Cho, Chonghe Zhang, Markas Sudzius, Martin Kroll, Stefan Meister, Karl Leo   +6 more
doaj   +1 more source

Extreme Narrowing of the Distributed Feedback Fiber Laser Linewidth Due to the Rayleigh Backscattering in a Single-Mode Fiber: Model and Experimental Test

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, Sofia R. Abdullina, Evgeny V. Podivilov, Alexander A. Vlasov, Danil R. Kharasov, Edgard A. Fomiryakov, Sergey P. Nikitin, Vladimir N. Treshchikov, Sergey A. Babin   +8 more
doaj   +1 more source

Optimisation of distributed feedback laser biosensors [PDF]

, 2007
A new integrated optical sensor chip is proposed, based on a modified distributed- feedback (DFB) semiconductor laser. The semiconductor layers of different refractive indices that comprise a laser form the basis of a waveguide sensor, where changes in ...
Coote, J, Reddy, Subrayal M, Sweeney, SJ
core   +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, Jiangming Xu, Hanwei Zhang, Pu Zhou   +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