研究目的
Investigating the principle and design of high-resolution sensors in the development of fiber-optic sensors, specifically focusing on a high-resolution temperature sensing system based on intracavity sensing of fiber ring laser.
研究成果
The proposed high-resolution temperature sensing system based on intracavity sensing of an FRL demonstrates a temperature resolution of 1.59 × 10-6 °C, improving from 10-3 °C to 10-6 °C. The method is extensible to other fiber-optic sensors for high-resolution measurement.
研究不足
The resolution and linear range of the sensing system are inter-constraint measures. The study suggests using multi-wavelength fiber laser to extend the linear range.
1：Experimental Design and Method Selection:
The study employs a fiber ring laser (FRL) with a Sagnac loop as the sensing head for temperature measurement. The theoretical model for intracavity sensing of FRL is presented.
2：Sample Selection and Data Sources:
The Sagnac loop includes polarization maintaining fiber (PMF) and a 3-dB coupler. The output spectra and power are measured under different temperatures.
3：List of Experimental Equipment and Materials:
Equipment includes a fiber-optic Sagnac loop, PMF, 3-dB coupler, optical spectrum analyzer (OSA), amplified spontaneous emission (ASE) source, and a controlled temperature platform.
4：Experimental Procedures and Operational Workflow:
The Sagnac loop is inserted into the FRL. The output power and spectra are measured as the temperature of the PMF is varied.
5：Data Analysis Methods:
The sensitivity and resolution of the sensing system are derived from the output power and spectra measurements.
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