64-element fiber laser sensing system with interferometric interrogation

Junbin Huang; Hongcan Gu; Bo Tang; Xin Mao

doi:10.1117/12.2243140

25 October 2016 64-element fiber laser sensing system with interferometric interrogation

Junbin Huang, Hongcan Gu, Bo Tang, Xin Mao

Proceedings Volume 9686, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices; 96861S (2016) https://doi.org/10.1117/12.2243140
Event: Eighth International Symposium on Advanced Optical Manufacturing and Testing Technology (AOMATT2016), 2016, Suzhou, China

Abstract

We have developed a 64-element fiber laser sensing system based on 8 wavelength and 8 space division multiplexing. The array consists of four 980nm pump source which illuminate eight group distributed feedback fiber lasers(DFB FL) and eight optical switches which addressing in turns. The wavelength shifts of the DFB FL are converted to phase changes by routing the reflected signal through a nearly path balanced fiber Michelson Interferometer(MI). Through introducing an improved symmetric phase recovering method based on a 3×3 coupler, the influence of light intensity and splitting ratio is decreased. A 64 channels real-time synchronous demodulation system has been realized based on FPGA.

Citation Download Citation

Junbin Huang, Hongcan Gu, Bo Tang, and Xin Mao "64-element fiber laser sensing system with interferometric interrogation", Proc. SPIE 9686, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices, 96861S (25 October 2016); https://doi.org/10.1117/12.2243140

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