Optical fiber temperature sensor using a thin film band pass filter and dual wavelength push-pull reflectometry

Yasutoshi Komatsu; Keiichi Inoue; Masayuki Nakano; Seiichi Onoda

doi:10.1117/12.785739

16 May 2008 Optical fiber temperature sensor using a thin film band pass filter and dual wavelength push-pull reflectometry

Yasutoshi Komatsu, Keiichi Inoue, Masayuki Nakano, Seiichi Onoda

Author Affiliations +

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70041D (2008) https://doi.org/10.1117/12.785739
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

This experimental temperature sensing system uses dual wavelength push-pull reflectometry and a thin-film band pass filter deposited on an optical fiber end face. The system presents advantages over fiber Bragg grating sensors: it can use the mature optical time domain reflectometry (OTDR) technology instead of expensive wavelength-selective technology; it can probe the temperature in a small spot area; and it can be free from influences of disturbances along the optical fiber or within the measuring system. Moreover, it preserves merits of optical fibers such as low transmission loss and immunity to electromagnetic noise. The presented system has measurement accuracy of better than ±0.5°C.

Citation Download Citation

Yasutoshi Komatsu, Keiichi Inoue, Masayuki Nakano, and Seiichi Onoda "Optical fiber temperature sensor using a thin film band pass filter and dual wavelength push-pull reflectometry", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70041D (16 May 2008); https://doi.org/10.1117/12.785739

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