13 August 1998 Fine-tuning filter for distributed optical fiber temperature measuring system
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Abstract
In distributed optical fiber temperature measuring system, temperature information is involved in Raman scattering light. In order to separate weak Raman scattering light from other stronger, adjacent scattering light, interference filter is commonly used and must be specially designed and fabricated. A group of fine tunable optical interference filters is presented to avoid the special procedure of filter. The principle of the filter group is discussed. The experimental results is presented. Results show that the accuracy of central wavelength is upgraded from +/- 0.8nm to +/- 0.2nm and the bandwidth is narrowed to the half of original filter's.
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Weimin Chen, Lingchuan Wu, Jian Zou, Shengjun Zhou, Shanglian Huang, "Fine-tuning filter for distributed optical fiber temperature measuring system", Proc. SPIE 3555, Optical and Fiber Optic Sensor Systems, (13 August 1998); doi: 10.1117/12.318204; https://doi.org/10.1117/12.318204
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