Abstract
A compact temperature sensor based on a selectively liquid-filled photonic crystal fiber (PCF) is proposed using controlled hole collapse in PCF post-processing. The first ring around the core is filled with liquid of higher refractive index than the matrix, while the outer rings of holes are filled with air. The bandgap (BG)-like effect of the high refractive index ring is analyzed. Absorption loss spectra of the fiber are found to be quite sensitive to the refractive index of liquid when the liquid is lossy. Using the BG-like effect, a fiber temperature sensor is fabricated by selectively injecting a mixture of dimethyl sulfoxide and aqueous gold colloids with a high thermo-optic coefficient to the PCF. Temperature sensitivity up to is experimentally confirmed.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Hu Liang, Weigang Zhang, Pengcheng Geng, Yange Liu, Zhi Wang, Junqi Guo, Shecheng Gao, and Suyuan Yan
Opt. Lett. 38(7) 1071-1073 (2013)
Chin-ping Yu and Jia-hong Liou
Opt. Express 17(11) 8729-8734 (2009)
Hu Liang, Weigang Zhang, Huayu Wang, Pengcheng Geng, Shanshan Zhang, Shecheng Gao, Chunxue Yang, and Jieliang Li
Opt. Lett. 38(20) 4019-4022 (2013)