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1 July 2015 The characteristic of gap FBG and its application
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Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96552U (2015) https://doi.org/10.1117/12.2183662
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of
Abstract
A gap fiber Bragg grating (g-FBG) is fabricated by cutting a uniform FBG in the middle to introduce a small air gap between the two sections. Numerical and experimental investigations show that the g-FBG has the characteristics of both a phase shifted FBG and a Fizeau interferometer. The influence of the air-gap shift longitudinally or transversely with respect to the fiber central axis and temperature to g-FBG's spectrums are investigated with numerical simulation and experiments, and the mathematic models are made. Based on g-FBG's different sensitivity to gap width and temperature, a micro-gap and temperature simultaneous measurement sensor was demonstrated. And a g-FBG based tunable fiber ring laser with a narrow line-width is demonstrated.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yuanhong Yang, Jun Hu, Xuejing Liu, and Wei Jin "The characteristic of gap FBG and its application", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96552U (1 July 2015); https://doi.org/10.1117/12.2183662
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