Interrogation of 5000 ultraweak fiber Bragg grating sensors using optical frequency domain reflectometry

Haoran Zhang; Dian Fan; Yuan Ma; Zeng Xiong; Yandong Pang; Xi Chen; Ciming Zhou

doi:10.1117/1.OE.57.10.106110

25 October 2018 Interrogation of 5000 ultraweak fiber Bragg grating sensors using optical frequency domain reflectometry

Haoran Zhang, Dian Fan, Yuan Ma, Zeng Xiong, Yandong Pang, Xi Chen, Ciming Zhou

Author Affiliations +

Optical Engineering, Vol. 57, Issue 10, 106110 (October 2018). https://doi.org/10.1117/1.OE.57.10.106110

Abstract

We demonstrate a sensing network with 5000 identical ultraweak fiber Bragg gratings (uwFBGs) at equal separations of 100 mm based on optical frequency domain reflectometry. The fiber is 510-m long and includes 5000 uwFBGs with a reflectivity of 0.02% and with identical peak reflection wavelengths of ∼1553.9 nm. With an applied strain from 0 to 600 μϵ on the uwFBGs, this system can unambiguously distinguish the shifts in the wavelengths and the locations of the uwFBGs. Compared with a traditional FBG interrogation method, this technique achieves a high-spatial resolution and a large number of multiplexed uwFBGs. The distinct advantages of the proposed sensor network make it an excellent candidate for distributed strain sensing measurements.

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Haoran Zhang, Dian Fan, Yuan Ma, Zeng Xiong, Yandong Pang, Xi Chen, and Ciming Zhou "Interrogation of 5000 ultraweak fiber Bragg grating sensors using optical frequency domain reflectometry," Optical Engineering 57(10), 106110 (25 October 2018). https://doi.org/10.1117/1.OE.57.10.106110

Received: 16 July 2018; Accepted: 2 October 2018; Published: 25 October 2018

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