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5 October 2009 Multiplexed long-length fiber Bragg grating distributed sensors based on synthesis of optical coherence function
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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75032J (2009) https://doi.org/10.1117/12.835249
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom
Abstract
Recently, we have reported a scheme for measuring Bragg-wavelength distribution inside a long-length fiber Bragg grating using synthesis of optical coherence function, which is one of the reflectometry techniques based on interferometer and heterodyne detection with an optical frequency-shifter and an electronic band-pass filter. However, the system did not have enough measurement range since it measured the distribution with only one grating. For extending the range, long-length FBG sensors are multiplexed and distribution in each grating is measured. In the process of multiplexing FBGs, a scheme for compensating the beat frequency shift due to the high speed sweep of the optical center frequency of the light source is introduced in the system.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Koji Kajiwara and Kazuo Hotate "Multiplexed long-length fiber Bragg grating distributed sensors based on synthesis of optical coherence function", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032J (5 October 2009); https://doi.org/10.1117/12.835249
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