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Optical Engineering

Phase and frequency noise measurement using passive self-homodyne technique
Author(s): Weitao Wang; Ying Shang; Chen Wang; Zhiqiang Song; Haifeng Qi; Zhihui Sun; Xiaolei Zhang; Jiasheng Ni; Jian Guo; Faxiang Zhang; Chang Wang; Gangding Peng
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Paper Abstract

For single longitudinal-mode lasers, the phase and frequency noises are very important parameters for their applications. The passive self-homodyne technique with an unbalanced Michelson interferometer is demonstrated to measure the phase and frequency noise characteristics. The Michelson interferometer for measurements is composed of a 3 × 3 optical fiber coupler and two Faraday rotator mirrors. The measurement performance is derived and discussed strictly from the transmission matrix of the coupler. The influence to the demodulation resulting from the asymmetry of the 3 × 3 optical fiber coupler is eliminated through the derived relationship between the differential phase fluctuation and the interferometer fringes. The technique is utilized to measure the phase and frequency noise features of a distributed feedback fiber laser. Based on the measured frequency noise spectrum, the lineshape, linewidth, and phase-error variance related to the laser coherence are able to be calculated and discussed well.

Paper Details

Date Published: 14 June 2017
PDF: 5 pages
Opt. Eng. 56(6) 066106 doi: 10.1117/1.OE.56.6.066106
Published in: Optical Engineering Volume 56, Issue 6
Show Author Affiliations
Weitao Wang, Shandong Academy of Sciences (China)
Ying Shang, Shandong Academy of Sciences (China)
Chen Wang, Shandong Academy of Sciences (China)
Zhiqiang Song, Shandong Academy of Sciences (China)
Haifeng Qi, Shandong Academy of Sciences (China)
Zhihui Sun, Shandong Academy of Sciences (China)
Xiaolei Zhang, Shandong Academy of Sciences (China)
Jiasheng Ni, Shandong Academy of Sciences (China)
Jian Guo, Shandong Academy of Sciences (China)
Faxiang Zhang, Shandong Academy of Sciences (China)
Chang Wang, Shandong Academy of Sciences (China)
Gangding Peng, Shandong Academy of Sciences (China)
The Univ. of New South Wales (Australia)

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