Abstract

We present a robust interferometer-based laser phase noise reduction technique that can easily be tuned to apply phase corrections at frequencies at which the interferometer is less affected by environmental disturbances. The technique operates by measuring the in-phase and quadrature components of the interference pattern along the circular Lissajous figure to compute the short-term phase error and reject long-term interferometer drift, and then uses that phase error to correct the laser phase noise. We successfully demonstrate phase noise reduction for an external cavity semiconductor laser without the need for an interferometer stabilization technique. The proposed technique realizes a frequency noise reduction about 20 dB between 100 Hz and 3 MHz. We also investigate the imbalance of the circular Lissajous figure and show that the performance degradation caused by an amplitude imbalance and a phase deviation from 90° can be compensated for by amplifying the extracted phase noise fluctuation.

© 2016 IEEE

Efficient laser noise reduction method via actively stabilized optical delay line

Dawei Li, Cheng Qian, Ye Li, and Jianye Zhao
Opt. Express 25(8) 9071-9077 (2017)

Reduction of semiconductor laser diode phase and amplitude noise in interferometric fiber optic sensors

T. P. Newson, F. Farahi, J. D. C. Jones, and D. A. Jackson
Appl. Opt. 28(19) 4210-4215 (1989)

Laser phase and frequency noise measurement by Michelson interferometer composed of a 3 × 3 optical fiber coupler

Dan Xu, Fei Yang, Dijun Chen, Fang Wei, Haiwen Cai, Zujie Fang, and Ronghui Qu
Opt. Express 23(17) 22386-22393 (2015)

Frequency noise reduction performance of a feed-forward heterodyne technique: application to an actively mode-locked laser diode

Mohamed Omar Sahni, Stéphane Trebaol, Laurent Bramerie, Michel Joindot, Seán P. Ó Dúill, Stuart G. Murdoch, Liam P. Barry, and Pascal Besnard
Opt. Lett. 42(19) 4000-4003 (2017)

Wideband tunable laser phase noise reduction using single sideband modulation in an electro-optical feed-forward scheme

Firooz Aflatouni and Hossein Hashemi
Opt. Lett. 37(2) 196-198 (2012)