Results 41 to 50 of about 5,425 (221)

Spectroscopic applications and frequency locking of THz photomixing with distributed-Bragg-reflector diode lasers in low-temperature-grown GaAs [PDF]

, 1997
A compact, narrow-linewidth, tunable source of THz radiation has been developed for spectroscopy and other high-resolution applications. Distributed-Bragg-reflector (DBR) diode lasers at 850 nm are used to pump a low-temperature-grown GaAs photomixer ...
Blake, Geoffrey A., Brown, E. R., Chen, Pin, Chou, S. Y., Gaidas, M. C., McIntosh, K. A., Nathan, M. I., Williamson, F.   +7 more
core   +1 more source

Chirp-Compensated DBR Lasers for TWDM-PON Applications

IEEE Photonics Journal, 2015
We propose a novel chirp compensation scheme for directly modulated three-section distributed Bragg reflector (3s-DBR) lasers in applications of the time- and wavelength-division multiplexed passive optical network systems.
Hang Zhao, Sheng Hu, Jialin Zhao, Yao Zhu, Yonglin Yu, Liam P. Barry   +5 more
doaj   +1 more source

Organic Polymer DBR Laser by Soft Lithography II: Optimization of Distributed Bragg Reflector

Journal of Photopolymer Science and Technology, 2003
We describe detailed analysis and optimization of the photopumped organic polymer distributed Bragg reflector laser having polymer grating fabricated using a replica molding method, which is an imprinting technology often called “soft lithography”, whose advantage is much less damage to materials. After the optimization, the laser oscillation threshold
Akiko Seki, Musubu Ichikawa, Naotoshi Suganuma, Yuji Tanaka, Toshiki Koyama, Yoshio Taniguchi   +5 more
openaire   +2 more sources

Low-frequency vibration measurement by a dual-frequency DBR fiber laser

Photonic Sensors, 2017
A dual-frequency distributed Bragg reflector (DBR) fiber laser based sensor is demonstrated for low-frequency vibration measurement through the Doppler effect.
Bing Zhang, Linghao Cheng, Yizhi Liang, Long Jin, Tuan Guo, Bai-Ou Guan   +5 more
doaj   +1 more source

High-Efficiency Grating Couplers for Pixel-Level Flat-Top Beam Generation

Photonics, 2022
We demonstrate a kind of grating coupler that generates a high quality flat-top beam with a small beamwidth from photonic integrated circuits into free-space.
Zhong-Tao Tian, Ze-Peng Zhuang, Zhi-Bin Fan, Xiao-Dong Chen, Jian-Wen Dong   +4 more
doaj   +1 more source

Efficient single frequency fibre lasers using novel photosensitive Er/Yb optical fibres

, 1997
Boron- and germanium-doped highly photosensitive cladding is used in a novel design to achieve photosensitive Er/Yb-doped fibers, permitting short, strong gratings (length ~1cm, reflectivity >99%) to be written without hydrogenation.
Caplen, J.E., Dong, L., Hsu, K., Loh, W.H., Minelly, J.D., Reekie, L.   +5 more
core   +1 more source

High-frequency acousto-optic effects in Bragg reflectors [PDF]

, 2014
Picosecond acoustic interferometry was used to study the acousto-optic properties of a distributed Bragg reflector (DBR) manufactured from two immiscible polymers (cellulose acetate and polyvinylcarbyzole). Picosecond strain pulses were injected into the
A. J. Kent, A. V. Akimov, Akimov, Arcizet, Bailey, Beugnot, Brüggemann, Chan, Cheng, Colvard, D. J. Farmer, Dainese, Ding, Fainstein, Gorishnyy, Groenen, Grudinin, Gröblacher, Hao, J. Bailey, J. S. Sharp, Jusserand, Katsidis, Lin, Lin, Léger, Mahboob, Maldovan, Matsuda, Matsuda, Morath, N. A. Gippius, Pennec, Safavi-Naeini, Salasyuk, Tas, Teufel, Thomsen, Walker, Weis, Wiederhecker, Wright, Wright, Zhang   +43 more
core   +2 more sources

Development of high-speed directly-modulated DFB and DBR lasers with surface gratings [PDF]

, 2011
The conventional distributed feedback and distributed Bragg reflector edge-emitting lasers employ buried gratings, which require two or more epitaxial growth steps.
Afzal, S., Bardella, Paolo, Dumitrescu, M., Eisenstein, G., Gready, D., Kamp, M., Karinen, J., Laakso, A., Melanen, P., Montrosset, Ivo, Parillaud, O., Reithmaier J.-P., Sek, G., Telkkälä, J., Uusimaa, P., Vallone, Marco Ernesto, Viheriälä, J.   +16 more
core   +1 more source

Bio‐Inspired Magnetically Tunable Structural Colors from Elliptical Self‐Assembled Block Copolymer Microparticles

Advanced Functional Materials, EarlyView.
Cephalopod‐inspired photonic microparticles with dynamic structural coloration are fabricated via confined self‐assembly of linear block copolymers into ellipsoids containing stacked lamellae. Embedded superparamagnetic nanoparticles enable rapid magnetic alignment, restoring vivid, angle‐dependent color.
Gianluca Mazzotta, Simone Bertucci, Jose Mendoza‐Carreño, Agustín Mihi, Paola Lova, Davide Comoretto, Ullrich Steiner, Marco Lattuada, Andrea Dodero   +8 more
wiley   +1 more source

Accurate Modeling of Distributed Bragg Reflector Laser Power and Wavelength Using Gaussian Process Regression

Photonics, 2023
Distributed Bragg reflector (DBR) lasers are widely used in many physics experiments. However, regarding the power and frequency control of DBR lasers, obtaining complete and accurate output characteristics is challenging due to the need for general and ...
Ziqian Yue, Li Cao, Dawei Wang, Ziqi Yuan, Jiajie Li, Baodong Chen, Yueyang Zhai   +6 more
doaj   +1 more source