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Generation and coherent characteristics analysis of laser phase modulation spectrum by cascaded phase modulators

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Abstract

Laser phase modulation spectrum with 25 frequency bands is generated by modulating a single frequency laser with two cascaded phase modulators (PMs) with driving voltage amplitudes at 3.2 V and 7.8 V, respectively. And the time delay self-heterodyne method is adopted to measure and analyze the coherent characteristics of the original single frequency laser light and the generated multi-frequency light from two phase modulation schemes. By comparison of laser linewidth, the experimental results show that the laser phase modulation does not change the coherent characteristics of each frequency band, and the laser phase modulation spectra benefit the performance optimization for the Rayleigh scattering based optical fiber sensing system.

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Authors and Affiliations

  1. School of Electrical and Information Engineering, Anhui University of Technology, Maanshan, 243002, China

    Lidong Lü & Qinghao Gao

  2. Xuji Group Co., Ltd., Xuchang, 461000, China

    Mingchao Yong

Authors
  1. Lidong Lü
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  2. Qinghao Gao
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  3. Mingchao Yong
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Correspondence to Lidong Lü.

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The authors declare that there are no conflicts of interest related to this article.

This work has been supported by the National Natural Science Foundation of China (No. 51977001).

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Lü, L., Gao, Q. & Yong, M. Generation and coherent characteristics analysis of laser phase modulation spectrum by cascaded phase modulators. Optoelectron. Lett. 18, 449–453 (2022). https://doi.org/10.1007/s11801-022-1194-7

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  • DOI: https://doi.org/10.1007/s11801-022-1194-7

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