Open AccessLaser phase and frequency noise measurement by Michelson interferometer composed of a 3 × 3 optical fiber coupler
Author(s) -
Dan Xu,
Fei Yang,
Dijun Chen,
Wei Fang,
Haiwen Cai,
Zujie Fang,
Ronghui Qu
Publication year - 2015
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.23.022386
Subject(s) - laser linewidth , optics , phase noise , interferometry , relative intensity noise , michelson interferometer , noise (video) , physics , laser , fiber laser , spectral density , optical fiber , semiconductor laser theory , materials science , telecommunications , computer science , artificial intelligence , image (mathematics)
A laser phase and frequency noise measurement method by an unbalanced Michelson interferometer composed of a 3 × 3 optical fiber coupler is proposed. The relations and differences of the power spectral density (PSD) of differential phase and frequency fluctuation, PSD of instantaneous phase and frequency fluctuation, phase noise and linewidth are derived strictly and discussed carefully. The method obtains the noise features of a narrow linewidth laser conveniently without any specific assumptions or noise models. The technique is also used to characterize the noise features of a narrow linewidth external-cavity semiconductor laser, which confirms the correction and robustness of the method.