Volume 34 Issue 05
May  2008
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Jia Yudong, Ou Pan, Yang Yuanhong, et al. Short fibre delayed self-heterodyne interferometer for ultranarrow laser linewidth measurement[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(05): 568-571. (in Chinese)
Citation: Jia Yudong, Ou Pan, Yang Yuanhong, et al. Short fibre delayed self-heterodyne interferometer for ultranarrow laser linewidth measurement[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(05): 568-571. (in Chinese)

Short fibre delayed self-heterodyne interferometer for ultranarrow laser linewidth measurement

  • Received Date: 27 Apr 2007
  • Publish Date: 31 May 2008
  • Ultranarrow laser linewidth measurement using an shorter delay fibre to realize delayed self-heterodyne interferometer was described. The fundamental using delayed self-heterodyne to measure laser linewidth was analyzed, and the emulator was programmed based on the mathematical module. An experimental setup was constructed to measure subkilohertz laser linewidths, the experimental results agree well with the emulational result. On the basis analysis, the method of short fibre delayed self-heterodyne were presented and analyzed. By using the method, the measure error can be decreased greatly when the length of delay fibre shorter than six times laser-s coherence length. It is proved that method is an effective tool for measuring an ultranarrow laser linewidth, and it can reduce the length of fibre.

     

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