Sensitivity improvement of UV FBG sensor by downsizing grating diameter

Il-Shin Song; Chan-Young Kim; Hyun-Kyoung Kim; Bok-Hyeon Kim; Tae-Jung Ahn

doi:10.1117/12.2031500

15 October 2013 Sensitivity improvement of UV FBG sensor by downsizing grating diameter

Il-Shin Song, Chan-Young Kim, Hyun-Kyoung Kim, Bok-Hyeon Kim, Tae-Jung Ahn

Proceedings Volume 8924, Fourth Asia Pacific Optical Sensors Conference; 892406 (2013) https://doi.org/10.1117/12.2031500
Event: Asia Pacific Optical Sensors Conference 2013, 2013, Wuhan, China

Abstract

We have recently reported azobenzene-coated fiber Bragg grating (FBG) for ultraviolet (UV) sensor. In this paper, we introduce an etched FBG for the strain sensitivity enhancement of the UV fiber grating sensors, which is inversely proportional to the fiber diameter. The sensitivity of the etched FBG with a diameter of ~60 μm is improved to be greater than twice of the original 125 μm fiber. In addition, the sensor system designed on the basis of the round-trip configuration can be used for many practical sensing applications in the field.

Citation Download Citation

Il-Shin Song, Chan-Young Kim, Hyun-Kyoung Kim, Bok-Hyeon Kim, and Tae-Jung Ahn "Sensitivity improvement of UV FBG sensor by downsizing grating diameter", Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 892406 (15 October 2013); https://doi.org/10.1117/12.2031500

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