In-line microfluidic refractometer based on C-shaped fiber assisted photonic crystal fiber Sagnac interferometer

Chuang Wu; Ming-Leung Vincent Tse; Zhengyong Liu; Bai-Ou Guan; Chao Lu; Hwa-Yaw Tam

doi:10.1364/OL.38.003283

In-line microfluidic refractometer based on C-shaped fiber assisted photonic crystal fiber Sagnac interferometer

Opt Lett. 2013 Sep 1;38(17):3283-6. doi: 10.1364/OL.38.003283.

Authors

Chuang Wu¹, Ming-Leung Vincent Tse, Zhengyong Liu, Bai-Ou Guan, Chao Lu, Hwa-Yaw Tam

Affiliation

¹ Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.

PMID: 23988935
DOI: 10.1364/OL.38.003283

Abstract

We propose and demonstrate a highly sensitive in-line photonic crystal fiber (PCF) microfluidic refractometer. Ultrathin C-shaped fibers are spliced in-between the PCF and standard single-mode fibers. The C-shaped fibers provide openings for liquid to flow in and out of the PCF. Based on a Sagnac interferometer, the refractive index (RI) response of the device is investigated theoretically and experimentally. A high sensitivity of 6621 nm/RIU for liquid RI from 1.330 to 1.333 is achieved in the experiment, which agrees well with the theoretical analysis.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Interferometry / instrumentation*
Microfluidic Analytical Techniques / instrumentation*
Optical Fibers*
Photons*
Refractometry / instrumentation*