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

• DOI: 10.1364/oe.23.022386
• Publication Date: 2015-08-17T14:49:58Z
• Authors: Dan Xu; Fei Yang; Dijun Chen; Fang Wei; Haiwen Cai; Zujie Fang; Ronghui Qu
• Keywords: Laser linewidth; Relative intensity noise

A laser phase and frequency noise measurement method by an unbalanced Michelson interferometer composed of a 3 × optical fiber coupler is proposed. The relations differences the power spectral density (PSD) differential fluctuation, PSD instantaneous linewidth are derived strictly discussed carefully. obtains features narrow conveniently without any specific assumptions or models. technique also used to characterize external-cavity semiconductor laser, which confirms correction robustness method.