研究目的
To report a temperature sensor built by a micro-structured fiber (MSF) into a Sagnac interferometer scheme, focusing on its linear response to thermal effects and sensitivity.
研究成果
The fiber optic temperature sensor based on SI architecture incorporating a THF segment exhibits a linear response with a sensitivity of 2.22 nm/°C. The scheme suggests the possibility of increasing thermal sensitivity by filling the holes with a suitable thermo-optic material.
研究不足
The system's sensitivity could be increased by filling the side-holes with a suitable thermo-optic material.
1：Experimental Design and Method Selection:
The sensor is built using a two-hole fiber (THF) in a Sagnac interferometer (SI) architecture. The operation principle is based on the birefringence changes on the THF induced by temperature differences.
2：Sample Selection and Data Sources:
A 2m-long THF segment is used as the sensing element.
3：List of Experimental Equipment and Materials:
Super-luminescent laser diode (SLD), 50/50 splicer, manual polarizer controller (PC), Optical Spectrum Analyzer (OSA), temperature chamber.
4：Experimental Procedures and Operational Workflow:
The THF segment is situated into a temperature chamber, and the transmission spectrum is measured with an OSA.
5：Data Analysis Methods:
The spectral shift of the SI pattern is observed and used to measure external temperature changes.
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