Research Papers: Sensing

Miniature refractometer based on modal interference in a hollow-core photonic crystal fiber with collapsed splicing

[+] Author Affiliations
Huaping Gong, Xinyong Dong

China Jiliang University, Institute of Optoelectronic Technology, Xueyuan Street, Xiasha Higher Education Zone, Hangzhou 310018, China

Chi Chiu Chan, Yi Fan Zhang, Wei Chang Wong

Nanyang Technological University, School of Chemical and Biomedical Engineering, Division of Bioengineering, Singapore 637457, Singapore

J. Biomed. Opt. 16(1), 017004 (January 18, 2011). doi:10.1117/1.3527259
History: Received May 26, 2010; Revised October 20, 2010; Accepted November 15, 2010; Published January 18, 2011; Online January 18, 2011
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A miniature modal interferometer based on a hollow-core photonic crystal fiber (HC-PCF) for refractive index measurement is demonstrated. The modal interferometer is fabricated by splicing the two ends of a 1.2-mm-long HC-PCF to a single-mode fiber (SMF). The air holes of the HC-PCF are fully collapsed by the discharge arc during the splicing procedure, and the length of each collapsed region is about 300 μm. The transmission spectra with different refractive indices outside the HC-PCF are measured. Measurement resolutions of an 8.1×10−4 refractive index unit (RIU) in the range of 1.35 to 1.39, and 4.3×10−4 RIU in the range of 1.39 to 1.43 are achieved, respectively. The temperature effect of the proposed refractometer is also analyzed.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Huaping Gong ; Chi Chiu Chan ; Yi Fan Zhang ; Wei Chang Wong and Xinyong Dong
"Miniature refractometer based on modal interference in a hollow-core photonic crystal fiber with collapsed splicing", J. Biomed. Opt. 16(1), 017004 (January 18, 2011). ; http://dx.doi.org/10.1117/1.3527259


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