研究目的
Investigating the sensitivity enhancement of Fabry-Perot temperature sensors filled with PDMS based on the Vernier effect.
研究成果
The Vernier effect significantly enhances the temperature sensitivity of Fabry-Perot sensors filled with PDMS, achieving a sensitivity of -1.808 nm/℃, which is about twice that of sensors without the Vernier effect. Further sensitivity improvements are possible by optimizing the free spectra range difference between the two FPIs.
研究不足
The study is limited by the precision of the optical spectrum analyzer and the temperature controlling accuracy of the heating table. The sensitivity improvement is dependent on the optimization of the free spectra range of the two FPIs.
1：Experimental Design and Method Selection:
The study involves the design of a sensitivity-enhanced Fabry-Perot temperature sensor using two Fabry-Perot interferometers (FPIs), one filled with PDMS to exploit the Vernier effect for sensitivity improvement.
2：Sample Selection and Data Sources:
The sensor's performance is tested using a broadband light source and an optical spectrum analyzer, with temperature variations induced by a heating table.
3：List of Experimental Equipment and Materials:
Includes a broadband light source (BBS), optical spectrum analyzer (OSA, YOKOGAWA), heating table (WEIXUNDA, WXD4020), and materials like PDMS (Sylgard 184-A and 184-B), hollow-core fiber (HCF, TSP075150), and single mode fiber (SMF).
4：Experimental Procedures and Operational Workflow:
Fabrication of FPIs, preparation and filling of PDMS into FPI2, and temperature sensitivity testing with and without Vernier effect.
5：Data Analysis Methods:
Analysis of reflectance spectra shifts to determine temperature sensitivity, using linear fitting functions for sensitivity calculation.
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