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Citation: Jia Yudong, Ou Pan, Zhang Chunxi, et al. Laser frequency discriminator using all fiber unbalanced-arm Mach-Zehnder interferometer technique[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(12): 1421-1424. (in Chinese)

Laser frequency discriminator using all fiber unbalanced-arm Mach-Zehnder interferometer technique

  • Received Date: 03 Nov 2008
  • Publish Date: 31 Dec 2009
  • An improved laser frequency discriminator using all fiber unbalanced-arm Mach-Zehnder interferometer technique was studied in detail. The acquisition technique of frequency error signal through utilizing triangular wave to modulate the an arm of interferometer was analyzed quantitatively. The piezo-electric transducer (PZT)-type frequency modulator was replaced with LiNbO3 phase modulator. The interferometer output signal was calculated through emulator. An experimental setup to validate the theoretical analysis was constructed. The result was agreement with simulation result. The modulation signal and environment perturbations were evaluated through experiment. The result shows the system stability is improved greatly, and the modulation dynamic range is extended from Hz to GHz. The phase to frequency responsibility was measured by applying lock-in amplifier, and the peak to peak frequency fluctuation of measured laser can be calculated according to the phase to frequency responsibility.

     

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