Noise floor analysis of the phase demodulation scheme using a 3×3 coupler

Huayong Zhang; Min Zhang; Yanbiao Liao

doi:10.1117/12.973676

7 November 2012 Noise floor analysis of the phase demodulation scheme using a 3×3 coupler

Huayong Zhang, Min Zhang, Yanbiao Liao

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842195 (2012) https://doi.org/10.1117/12.973676
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

The noise floor of the phase demodulation scheme using a 3×3 coupler was analyzed, where the signal was demodulated by linear combination of the three outputs and digital inverse arctangent approach. According to our study, the noise floor has connection with the noise intensity, noise correlation and initial phase. The approximate expressions to calculate the noise floor were deduced and validated by simulations with input Gaussian white noise. Experiment results show that the predicted noise floor distribution as a function of initial phase agreed well with the experiment results. The noise floor of the experiment system was below 0.70 μrad/√Hz@1kHz.

Citation Download Citation

Huayong Zhang, Min Zhang, and Yanbiao Liao "Noise floor analysis of the phase demodulation scheme using a 3×3 coupler", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842195 (7 November 2012); https://doi.org/10.1117/12.973676

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