Results 171 to 180 of about 4,679 (225)

Hybrid integrated narrow-linewidth semiconductor lasers

Applied Optics, 2023
Integrated narrow-linewidth lasers are the key devices in compact coherent optical systems of metrology, sensing, and optical microwave generation. Here, we demonstrate a hybrid integrated laser based on an optical negative feedback scheme.
Baoshuai Li, Weiqiang Wang, Honglei Yang, Hao Liu, Sai T. Chu, Brent Little, Yuxia Song, Boren Guan, Wenfu Zhang, Mingyu Li   +9 more
openaire   +2 more sources

Future Narrow Linewidth Lasers

Optical Fiber Communication Conference, 2015
We describe the challenges and solutions for future narrow linewidth lasers with small footprint. We fabricated DR laser array based narrower linewiedth TLS. We introduce ITXA of a co-packaged DFB array based TLS and InP-based modulator.
Toshikazu Mukaihara, Toshio Kimura, Hiroyuki Koshi   +2 more
openaire   +1 more source

Narrow linewidth quantum cascade laser

Conference on Lasers and Electro-Optics, 2020
A narrow linewidth quantum cascade laser was obtained by optical feedback locking to a high finesse linear cavity with locking bandwidth larger than 5 MHz, resulting in an instantaneous linewidth at mHz levels.
Gang Zhao, D. Michelle Bailey, Adam J. Fleisher   +2 more
openaire   +1 more source

Narrow linewidth single frequency microfiber laser

Optics Letters, 2012
A compact 2 kHz linewidth single frequency microfiber ring laser is demonstrated. Microfiber, with a diameter of 1.88 μm, which is drawn from an Er(3+)/Yb(3+) co-doped phosphate glass fiber, serves as the gain medium. By using this microfiber, a double-knot resonator with a total length of 1.75 mm is constructed.
Wei, Fan, Jiulin, Gan, Zhishen, Zhang, Xiaoming, Wei, Shanhui, Xu, Zhongmin, Yang   +5 more
openaire   +2 more sources

Dual-wavelength Narrow-linewidth Lasers and Their Applications

Advanced Solid-State Lasers Congress, 2013
Our recent work on distributed-feedback, narrow-linewidth channel waveguide lasers in Er3+- and Yb3+-doped Al2O3 layers deposited on silicon microchips is reviewed.
Pollnau, Markus, Bernhardi, Edward, Worhoff, Kerstin, de Ridder, R.M.   +3 more
openaire   +2 more sources

Narrow-Linewidth Lasers on a Silicon Chip

2014
Diode-pumped distributed-feedback (DFB) channel waveguide lasers were demonstrated in Er3+-doped and Yb3+-doped Al2O3 on standard thermally ox-idized silicon substrates. Uniform surface-relief Bragg gratings were patterned by laser-interference lithography and etched into the SiO2 top cladding. The maxi-mum grating reflectivity exceeded 99%. Monolithic
Bernhardi, Edward, Pollnau, Markus
openaire   +1 more source

Narrow-linewidth quantum cascade laser at 86  μm

Optics Letters, 2014
We report on a narrow-linewidth distributed-feedback quantum cascade laser at 8.6 μm that is optical-feedback locked to a high-finesse V-shaped cavity. The spectral purity of the quantum cascade laser is fully characterized using a high-sensitivity optical frequency discriminator, leading to a 1 ms linewidth of less than 4 kHz and a minimum laser ...
Eugenio Fasci, COLUCCELLI, NICOLA, CASSINERIO, MARCO, GAMBETTA, ALESSIO, Laurent Hilico, Livio Gianfrani, LAPORTA, PAOLO, Antonio Castrillo, Gianluca Galzerano   +8 more
openaire   +5 more sources

Narrow Linewidth Lasers for Low-Energy Coherent Communications

Optical Fiber Communication Conference (OFC) 2022, 2022
We present chip-scale lasers with ~1Hz fundamental linewidths, ~30Hz integral linewidths, and stability better than 2x10-13 (50ms) enabling energy-efficient, ultra-low residual phase error carrier recovery for DSP-free, high-capacity coherent communications in tomorrow’s data center interconnects.
Grant M. Brodnik, Mark W. Harrington, John H. Dallyn, Debapam Bose, Wei Zhang, Liron Stern, Paul A. Morton, Ryan A. Behunin, Scott B. Papp, Daniel J. Blumenthal   +9 more
openaire   +2 more sources

Modulatable narrow-linewidth semiconductor lasers

Applied Physics Letters, 1988
We find that using the technique of optical feedback locking, to narrow semiconductor linewidths, does not sacrifice the ability to modulate the laser’s frequency via the injection current. The frequency of a laser is stabilized to a separate Fabry–Perot reference cavity using resonant optical feedback and can be modulated efficiently at frequencies ...
L. Hollberg, M. Ohtsu
openaire   +1 more source

Wavelength-tunable narrow-linewidth gaseous Raman laser

Applied Optics, 2021
Gaseous Raman lasers cover a range of wavelengths but lack wavelength tunability. Here, a 1 c m − 1 linewidth 532 nm laser was used as a pump laser, and with a narrow-linewidth seed laser injection, a narrow-linewidth first Stokes (S1) Raman ...
Chencheng Shen, Xianglong Cai, Xinjun Su, Tiancheng Zheng, Jinbo Liu, Ying Chen, Yuxi Jia, Dong Liu, Jingwei Guo   +8 more
openaire   +2 more sources