Results 21 to 30 of about 41,136 (294)

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

Crystals, 2019
Magnonics, an emerging research field, aims to control and manipulate spin waves in magnetic materials and structures. However, the current understanding of spin waves remains quite limited.
Hua-Yi Hou, Ming Yang, Jin Qiu, In-Sang Yang, Xiang-Bai Chen   +4 more
doaj   +1 more source

Discrete mode laser diodes with very narrow linewidth emission [PDF]

, 2007
Ex-facet, free-running low linewidth (~100 kHz), single mode laser emission is demonstrated using low cost, regrowth-free ridge waveguide Discrete Mode Fabry Pérot laser diode chips.
Kelly, Brian, Rensing, Marc, Wendelboe, J., O'Gorman, J., Phelan, Richard, O\u27Carroll, John, Perry, Philip, Jones, D., Watts, C.B., Guignard, Celine, Barry, Liam P., Herbert, C., O\u27Gorman, J., O'Carroll, John, Kaszubowska-Anandarajah, Aleksandra, O'Gorman, James   +15 more
core   +2 more sources

High-Power Narrow-Linewidth Q-Switched TEM₀₀ Mode 355-nm Laser

IEEE Photonics Journal, 2018
We report on a high pulse energy, narrow-linewidth, Q-switched ultraviolet (UV) laser at 355 nm from the third harmonic generation (THG) of a 1064-nm Nd:YAG master oscillator power amplifier (MOPA) system.
Yujiao Li, Wei Tu, Baoshang Wang, Nan Zong, Feng Yang, Fengfeng Zhang, Shenjin Zhang, Zhimin Wang, Qinjun Peng, Dafu Cui, Zuyan Xu   +10 more
doaj   +1 more source

A Cost-Effective Distributed Acoustic Sensor Using a Commercial Off-the-Shelf DFB Laser and Direct Detection Phase-OTDR

IEEE Photonics Journal, 2016
We propose and experimentally demonstrate the use of cyclic pulse coding for enhanced performance in distributed acoustic sensing based on a phase-sensitive optical time-domain reflectometry ( $\phi$-OTDR) using direct detection.
Yonas Muanenda, Claudio J. Oton, Stefano Faralli, Fabrizio Di Pasquale   +3 more
doaj   +1 more source

Spectral behavior of long wavelength VCSELs [PDF]

, 2008
For a long time, only a small wavelength range of Vertical-Cavity Surface-Emitting Lasers (VCSEL) was available. The current evolution in process technology allows the fabrication of long wavelength VCSEL that is interesting for Telecom systems because ...
Bacou, Alexandre, Rissons, Angélique, Mollier, Jean-Claude   +2 more
core   +1 more source

Effects of Linewidth Broadening Method on Recoil of Sodium Laser Guide Star

Atmosphere, 2021
The linewidth broadening of the circular-polarized continuous wave laser mitigates the recoil effects of the sodium laser guide star very well. By choice of the optimal laser linewidth, the relations between the laser intensity and average spontaneous ...
Xiangyuan Liu, Xianmei Qian, Rui He, Dandan Liu, Chaolong Cui, Chuanyu Fan, Hao Yuan   +6 more
doaj   +1 more source

Narrow Linewidth Distributed Bragg Reflectors Based on InGaN/GaN Laser

Micromachines, 2019
A variety of emerging technologies, such as visible light communication systems, require narrow linewidths and easy-to-integrate light sources. Such a requirement could be potentially fulfilled with the distributed Bragg reflector (DBR) lasers, which are
Wuze Xie, Junze Li, Mingle Liao, Zejia Deng, Wenjie Wang, Song Sun   +5 more
doaj   +1 more source

Characterization and Direct Modulation of a Multi-Section PIC Suited for Short Reach Optical Communication Systems

Photonics, 2020
A multi-section active photonic integrated circuit (PIC) is characterized in detail to gauge its suitability as a transmitter for short reach applications.
Mohab N. Hammad, Aleksandra Kaszubowska-Anandarajah, M. Deseada Gutierrez Pascual, Pascal Landais, Prajwal D. Lakshmijayasimha, Gaurav Jain, Prince M. Anandarajah   +6 more
doaj   +1 more source

Linewidth narrowing in free-space-running diamond Brillouin lasers

High Power Laser Science and Engineering, 2023
This study analyzes the linewidth narrowing characteristics of free-space-running Brillouin lasers and investigates the approaches to achieve linewidth compression and power enhancement simultaneously.
Duo Jin, Zhenxu Bai, Zhongan Zhao, Yifu Chen, Wenqiang Fan, Yulei Wang, Richard P. Mildren, Zhiwei Lü   +7 more
doaj   +1 more source

Linewidth Narrowing of Mutually Injection Locked Semiconductor Lasers with Short and Long Delay

Applied Sciences, 2019
A simple and effective approach to semiconductor laser linewidth narrowing via mutual injection locking is proposed and demonstrated in both short and long delay regimes.
Weichao Ma, Bing Xiong, Changzheng Sun, Xu Ke, Jian Wang, Zhibiao Hao, Lai Wang, Yanjun Han, Hongtao Li, Jiadong Yu, Yi Luo   +10 more
doaj   +1 more source