Open AccessUltra-narrow linewidth vertical-cavity surface-emitting laser based on external-cavity weak distributed feedback
Author(s) -
Li Jiang,
Tianyi Lan,
Laiyang Dang,
Jiali Li,
Ligang Huang,
Leilei Shi,
Guolu Yin,
Tao Zhu
Publication year - 2022
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.472383
Subject(s) - laser linewidth , vertical cavity surface emitting laser , materials science , optics , laser , optoelectronics , longitudinal mode , rayleigh scattering , wavelength , injection seeder , distributed feedback laser , physics
We demonstrate an ultra-narrow linewidth vertical-cavity surface-emitting laser (VCSEL) based on external-cavity weak distributed feedback from Rayleigh backscattering (RBS). A single longitudinal mode VCSEL with the linewidth as narrow as 435 Hz and a contrast of 55 dB are experimentally achieved by RBS fiber with a feedback level of RBS signal of -27.6 dB. By adjusting the thermal resistance of the VCSEL from 4.5 kΩ to 7.0 kΩ, the laser wavelength can be tuned from 1543.324 nm to 1542.06 nm with a linear tuning slope of -0.506 nm/kΩ. In the tuning process, the linewidth fluctuates in the range of 553-419 Hz.