Measurement of spontaneous Brillouin scattering in optical fiber with a fiber Bragg grating Sagnac loop

Zhonghua Ou; Lixun Zhang; Zhiyong Dai; Yongzhi Liu

doi:10.1117/12.786070

16 May 2008 Measurement of spontaneous Brillouin scattering in optical fiber with a fiber Bragg grating Sagnac loop

Zhonghua Ou, Lixun Zhang, Zhiyong Dai, Yongzhi Liu

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70043Z (2008) https://doi.org/10.1117/12.786070
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

A novel method for direct optical detection of spontaneous Brillouin scattering in optical fiber by using a fiber Bragg grating (FBG) Sagnac loop is introduced. The transmission character as an optical filter of FBG Sagnac loop is investigated theoretically. The filter which is based on an asymmetric grating Sagnac loop is manufactured and used in the measurement of spontaneous Brillouin scattering sensing system, and the separation of backscattered spontaneous Brillouin from Rayleigh is achieved effectively. It is demonstrated that the fiber grating Sagnac loop filter can be applied in the distributed sensing system based on spontaneous Brillouin scattering.

Citation Download Citation

Zhonghua Ou, Lixun Zhang, Zhiyong Dai, and Yongzhi Liu "Measurement of spontaneous Brillouin scattering in optical fiber with a fiber Bragg grating Sagnac loop", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70043Z (16 May 2008); https://doi.org/10.1117/12.786070

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