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We experimentally demonstrate a novel reflective temperature-insensitive all-fiber pressure sensor based on polarization-maintaining photonic crystal fiber (PM-PCF). The sensing head is composed of a small segment of PM-PCF and a leading single-mode fiber (SMF). Two orthogonal polarized modes in the PM-PCF are excited by the splice point between SMF and the PM-PCF. After a round trip along the PM-PCF,...
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