Open AccessAll-optical frequency stabilization and linewidth reduction of distributed feedback diode lasers by polarization rotated optical feedback
Author(s) -
Yueqiang Sun,
Wei Fang,
Zuoren Dong,
Dijun Chen,
Haiwen Cai,
Ronghui Qu
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.015757
Subject(s) - laser linewidth , optics , distributed feedback laser , laser , semiconductor laser theory , materials science , diode , polarization (electrochemistry) , laser diode , beat (acoustics) , optoelectronics , physics , chemistry
The frequency of a distributed feedback diode laser (DFB-LD) is stabilized on Cesium ((133)Cs) D(2) saturated absorption lines by the polarization rotated optical feedback method (PROF). Different from the conventional frequency stabilization methods by adjusting the LD pump current, no extra electrical feedback is needed with the PROF. The self-homodyne beat spectra FWHM linewidth of the DFB laser is measured to be 1.1 MHz, greatly reduced by a factor of about 40 from its free-running linewidth of 44 MHz; and the optical frequency drift is reduced from 96 MHz down to 6.6 MHz.