Multiplexing of LPFG resonant wavelengths for abnormal reaction detection in large-scale plants by distributed high temperature monitoring


Five resonant wavelengths could be multiplexed successfully by writing long-period gratings (LPGs) with different pitches. A preliminary distributed temperature monitoring experiment was conducted, and it was estimated that separation between 2 adjacent resonant peaks was 23.7 nm, even when the temperature difference between 2 adjacent LPGs was 100 °C. This… (More)


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