Temperature-independent displacement sensor based on the chirped grating in a microfiber taper

Xiang Shen; Jie Li; Li-Peng Sun; Yang Ran; Long Jin; Bai-ou Guan

doi:10.1117/12.2034191

15 October 2013 Temperature-independent displacement sensor based on the chirped grating in a microfiber taper

Xiang Shen, Jie Li, Li-Peng Sun, Yang Ran, Long Jin, Bai-ou Guan

Proceedings Volume 8924, Fourth Asia Pacific Optical Sensors Conference; 89242V (2013) https://doi.org/10.1117/12.2034191
Event: Asia Pacific Optical Sensors Conference 2013, 2013, Wuhan, China

Abstract

We demonstrate a temperature-independent displacement sensor by inscribing a periodic grating in a microfiber taper with assistance of the 193-nm ultraviolet exposure technique. The obtained bandwidth is as large as 29.64nm for the grating with diameter of 3.8~6.38μm and length of 6.2mm, respectively. When the displacement is increased from 0 to 1.08mm, the reflecting bandwidth reduces to 3.38nm gradually, producing an average sensitivity of around −22.8nm/mm. The minimum displacement of measurement is ~4.39×10⁻⁴mm considering the wavelength resolution of 10pm in the optical spectrum analyzer. Moreover, the temperature-cross sensitivity is suppressed.

Citation Download Citation

Xiang Shen, Jie Li, Li-Peng Sun, Yang Ran, Long Jin, and Bai-ou Guan "Temperature-independent displacement sensor based on the chirped grating in a microfiber taper", Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 89242V (15 October 2013); https://doi.org/10.1117/12.2034191

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