Modified phase-generated carrier demodulation compensated for the propagation delay of the fiber.

@article{Huang2007ModifiedPC,
  title={Modified phase-generated carrier demodulation compensated for the propagation delay of the fiber.},
  author={Shih-Chu Huang and Hermann Lin},
  journal={Applied optics},
  year={2007},
  volume={46 31},
  pages={7594-603}
}
In general applications, the output signals of the fiber-optic interferometric sensor (FOIS) need some demodulation techniques to linearly demodulate the sensing phase signal. The common signal demodulation circuit of the FOIS is passive homodyne demodulation using phase-generated carrier [(PGC) demodulation]. Preliminary analysis of the research demonstrates that a variation in the output demodulated signal is related to the length of the fiber, and the output demodulated signal will approach… CONTINUE READING