Results 11 to 20 of about 299,353 (257)

Numerical simulation of a DFB - fiber laser sensor (part 1) [PDF]

open access: yesINCAS 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

open access: yesAdvanced 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

Powerful narrow linewidth random fiber laser

open access: yesPhotonic 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

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

open access: yesPhotonics, 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

Communication-Efficient Distributed SGD with Error-Feedback, Revisited

open access: yesInternational 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

Smartphone Feedback: Using an iPhone to Improve the Distribution of Audio Feedback [PDF]

open access: yesInternational Journal of Electrical Engineering & Education, 2011
Smartphones combine the flexibility of MP3 recorders and the connectivity of a PC in a discrete handheld device, thereby suggesting their application as a user friendly tool for giving recorded audio feedback efficiently. This paper describes a smartphone feedback methodology and presents findings from research on its use with 130 Level 5 (2nd year of ...
Nortcliffe, Anne, Middleton, Andrew
openaire   +1 more source

Recent Advances in Room Temperature, High-Power Terahertz Quantum Cascade Laser Sources Based on Difference-Frequency Generation

open access: yesPhotonics, 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

Self-Injection Locking of a Distributed Feedback Laser Diode Using a High-Finesse Fabry-Perot Microcavity

open access: yesApplied 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

Distributed Transmit Beamforming without Phase Feedback

open access: yesEURASIP Journal on Wireless Communications and Networking, 2010
Phase feedback and adjustment between wireless nodes greatly reduce the power efficiency of distributed beamforming. In this paper, we propose a distributed transmit beamforming method without any phase feedback between nodes. The concept of our approach
Chen Wang   +4 more
doaj   +2 more sources

WiMedia Distributed Routing Protocol Based on Link Cost Feedback [PDF]

open access: yesJisuanji gongcheng, 2020
In the Ultra Wide Band (UWB) distributed media access control protocol,when the DRP reserved block does not send all data frames,the relay device cannot send the received data frames from the source device in the current DRP policy until the next DRP ...
HE Rongyi, WANG Xiaoqun, CHEN Kaifeng
doaj   +1 more source

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