Home > Archive>Volume 18, Issue 8, 2022 >449-453. DOI:https://doi.org/10.1007/s11801-022-1194-7
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Generation and coherent characteristics analysis of laser phase modulation spectrum by cascaded phase modulators
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1. School of Electrical and Information Engineering, Anhui University of Technology, Maanshan 243002, China;2. Xuji Group Co., Ltd., Xuchang 461000, China

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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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Lü Lidong, GAOQinghao,,YONGMingchao. Generation and coherent characteristics analysis of laser phase modulation spectrum by cascaded phase modulators[J]. Optoelectronics Letters,2022,18(8):449-453

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History
  • Received:December 28,2021
  • Revised:May 01,2022
  • Online: September 09,2022
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