研究目的
To propose and experimentally demonstrate a simple to fabricate, cost-effective, robust, and highly accurate fiber optic temperature sensor based on an in-fiber Fabry-Perot interferometer (FFPI) embedded in a polyester resin.
研究成果
An easy-to-fabricate and accurate temperature sensor based on a fiber FP air-cavity embedded in a light and corrosion-resistant polyester resin was proposed and experimentally demonstrated. The sensor showed good sensitivity and resolution, making it attractive for environmental sensing applications. The practicality of this real-time sensor, along with its good temporal stability, was highlighted.
研究不足
The dynamic range of the sensor was demonstrated from 10 to 30 oC, although the polyester resin used can stand temperatures from -10 to 100 oC. The adherence of fiber optic and resin needs to be improved to ensure that the fiber is stretching (compressing) at the same rate as the resin to take full advantage of the resin's temperature range.
1：Experimental Design and Method Selection:
The sensor head consists of an FFPI embedded in a polyester resin mold. The FFPI was assembled by splicing a microsegment of capillary fiber between two single-mode fibers. The reflected spectrum of the FFPI was analyzed to monitor temperature changes.
2：Sample Selection and Data Sources:
A capillary fiber segment of 14.66 μm was used to create the FFPI. The reflected spectrum was monitored using an optical spectrum analyzer.
3：66 μm was used to create the FFPI. The reflected spectrum was monitored using an optical spectrum analyzer.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Single-mode fibers, capillary fiber, polyester resin (Polylite? 8016), SLED light source, optical circulator, optical spectrum analyzer (YOKOWAGA AQ6374), tunable laser, optical power meter, Peltier plate (Echoterm? IC25 TORREY PINES SCIENTIFIC).
4：Experimental Procedures and Operational Workflow:
The FFPI was fabricated by splicing the capillary fiber between two single-mode fibers. The sensor head was then embedded in polyester resin and cured. Temperature changes were induced using a Peltier plate, and the reflected spectrum was monitored to determine the sensor's response.
5：Data Analysis Methods:
The wavelength shift of the interference dip in the reflected spectrum was analyzed to determine temperature changes. Both wavelength and intensity interrogation schemes were used to characterize the sensor's performance.
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