研究目的
Investigating the high-sensitivity hydraulic pressure sensor based on a Fabry-Perot interferometer filled with polydimethylsiloxane film for accurate pressure measurement with temperature compensation.
研究成果
The proposed hydraulic pressure sensor based on the FPI filled with PDMS film exhibits high sensitivity and compact size. A temperature compensation method using a FBG effectively eliminates the influence of temperature, enabling accurate pressure measurement.
研究不足
The fabrication process is hand-made, which may affect the consistency of the sensor. The sensitivity decreases with pressure increasing due to the nonlinear deformation of PDMS.
1：Experimental Design and Method Selection:
The sensor is fabricated by splicing a section of hollow core fiber (HCF) to the end of a lead-in single mode fiber (SMF), and the tail of the HCF is filled with the PDMS film.
2：Sample Selection and Data Sources:
The PDMS is prepared by mixing the precursor of the elastic polymer (Sylgard 184-A) and the curing agent (Sylgard 184-B) with the ratio of 5:
3：List of Experimental Equipment and Materials:
A commercial fiber fusion splicer (Fujikura, FSM-62S), broadband light source (BBS), optical spectrum analyzer (OSA), and a heating station.
4：Experimental Procedures and Operational Workflow:
The UCFPMC structure is dipped into the precursor of the PDMS, baked on a heating station, and then tested for hydraulic pressure and temperature responses.
5：Data Analysis Methods:
The relationship between the dip wavelength and the hydraulic pressure is analyzed using polynomial and linear fitting.
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