A novel reflective refractometer based on a thin-core fiber (TCF) sandwiched between a leading single-mode fiber (SMF) and a fiber Bragg grating (FBG) imprinted SMF stub was demonstrated. The reflection from the fiber stub occurs in two well-defined wavelength bands, corresponding to the Bragg core mode and cladding modes.
The TCF section functions as a tailorable bridge between the FBG core mode reflection and the surrounding refractive index (SRI). Linear response with enhanced sensitivity of 133.26 dB/refractive index unit for temperature-immune SRI measurement within the biologically desirable sensing range of 1.33–1.41 has been achieved via cost-effective power detection. (© 2012 Optical Society of America)
Citation
Yue Ma, Xueguang Qiao, Tuan Guo, Ruohui Wang, Jing Zhang, Yinyan Weng, Qiangzhou Rong, Manli Hu, and Zhongyao Feng, "Reflective fiber-optic refractometer based on a thin-core fiber tailored Bragg grating reflection," Opt. Lett. 37, 323-325 (2012)
Author Affiliations
Yue Ma, Xueguang Qiao, Ruohui Wang, Jing Zhang, Yinyan Weng, Qiangzhou Rong, Manli Hu, Zhongyao Feng (Department of Physics, Northwest University, Xi’an, Shaanxi 710069, China)
Tuan Guo (Institute of Photonics Technology, Jinan University, Guangzhou 510632, China)
History
Original Manuscript: September 20, 2011
Revised Manuscript: December 8, 2011
Manuscript Accepted: December 9, 2011
Published: January 20, 2012
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