Research on key technology of underwater acoustic communication based on Sagnac fiber optic hydrophone

Liangjun Yan; Keqin Huang; Yutao Chen; Yang Yang; Xiaotong Zhu; Xuze Chen; Zhangqi Song

doi:10.1117/12.2587699

12 March 2021 Research on key technology of underwater acoustic communication based on Sagnac fiber optic hydrophone

Liangjun Yan, Keqin Huang, Yutao Chen, Yang Yang, Xiaotong Zhu, Xuze Chen, Zhangqi Song

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117639E (2021) https://doi.org/10.1117/12.2587699
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

This paper reports a kind of OFDM underwater acoustic communication technology based on Sagnac fiber optic hydrophone. It adopts the fiber optic hydrophone technology based on Sagnac fiber ring composed of 3×3 fiber coupler. The sampling rate of the system is 48kHz, the fiber optic hydrophone can achieve up to 12.3kHz underwater acoustic detection bandwidth and -140dB (0dB re 1rad/ μPa) sound pressure sensitivity. According to the test results of the underwater acoustic communication experiment, the underwater acoustic communication rate is up to 24kbps, the bit error rate is at the magnitude of 10⁻² , and the simulation communication rate is up to 100kbps. Sagnac fiber optic hydrophone shows excellent low-frequency suppression ability and simple structure, which are very suitable for underwater acoustic communication.

Citation Download Citation

Liangjun Yan, Keqin Huang, Yutao Chen, Yang Yang, Xiaotong Zhu, Xuze Chen, and Zhangqi Song "Research on key technology of underwater acoustic communication based on Sagnac fiber optic hydrophone", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117639E (12 March 2021); https://doi.org/10.1117/12.2587699

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