The effect of optical phase on the Brillouin spectrum in the distributed sensor system

Xiaoyi Bao; Yidun Wan; Lufan Zou; Liang Chen

doi:10.1117/12.624249

23 May 2005 The effect of optical phase on the Brillouin spectrum in the distributed sensor system

Xiaoyi Bao, Yidun Wan, Lufan Zou, Liang Chen

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.624249
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

Because of the phase modulation (PM) and amplitude modulation (AM) of the probe signal from the electric optical modulator (EOM), the Brillouin gain/loss spectrum becomes asymmetric. The central Brillouin frequency is shifted from that of AM pulse. The maximum extinction ratio of the EOM is limited to ~29 cB for power splitting ratio of 51% to 49%. The PM also induces sub-peaks in the Brillouin spectrum due to the interaction of phonon field and AM/PM based probe beam. The sub-peaks is enhanced when the beat frequency of pump and probe beam is off from the Brillouin frequency.

Citation Download Citation

Xiaoyi Bao, Yidun Wan, Lufan Zou, and Liang Chen "The effect of optical phase on the Brillouin spectrum in the distributed sensor system", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.624249

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