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A highly temperature sensitive directional coupler is demonstrated experimentally by selectively filling nematic liquid crystal into a single void of the photonic crystal fiber. The temperature response of the device exhibits good linearity.
We fabricate and demonstrate a refractometer based on photonic crystal fiber (PCF) modal interferometer. The streptavidin and biotin are used as analyte and receptor in the experiment. The fabrication of the sensor is carried out via micro-hole collapsing with straightforward fusion arc splicing technique. Both sides of a short length of PCF (∼3 mm) are spliced to conventional single mode fibers (SMF)...
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