High multiplexing capability and ultrahigh resolution interrogation for optical fiber Bragg grating sensing system

Yongjun Wang; Xiaolei Zhang; Yongchao Liu; Xiaolin Liu; Zhaoyi Yang; Zhi Wang

doi:10.1117/12.970280

17 October 2012 High multiplexing capability and ultrahigh resolution interrogation for optical fiber Bragg grating sensing system

Yongjun Wang, Xiaolei Zhang, Yongchao Liu, Xiaolin Liu, Zhaoyi Yang, Zhi Wang

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842146 (2012) https://doi.org/10.1117/12.970280
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A high multiplexing capability and ultrahigh resolution interrogation scheme for optical fiber Bragg grating sensing system was proposed. A scan ring laser based on semiconductor optical amplifier (SOA) and tunable Fabry-Perot interferometer can provide 70nm bandwidth and 32 monitoring channels, and therefore the interrogator can simultaneously detect more than 1000 fiber Bragg grating (FBG) sensors. In the interrogation scheme, a gas absorption spectral line was used as a wavelength reference, and a comb filter was designed as a standard device that can dynamically calibrate the wavelength of FBG sensors. Therefore, the wavelength resolution can reach to 0.5 pm.

Citation Download Citation

Yongjun Wang, Xiaolei Zhang, Yongchao Liu, Xiaolin Liu, Zhaoyi Yang, and Zhi Wang "High multiplexing capability and ultrahigh resolution interrogation for optical fiber Bragg grating sensing system", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842146 (17 October 2012); https://doi.org/10.1117/12.970280

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