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  • Title: In-line microfluidic refractometer based on C-shaped fiber assisted photonic crystal fiber Sagnac interferometer.
    Author: Wu C, Tse ML, Liu Z, Guan BO, Lu C, Tam HY.
    Journal: Opt Lett; 2013 Sep 01; 38(17):3283-6. PubMed ID: 23988935.
    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.
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