Long-distance fiber sensor system based on the second-order Raman pump and amplification |
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Authors: | B. Dong J. Hu Z. Chen C. Yu |
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Affiliation: | 1. RF & Optical Department, Institute for Infocomm Research, 138632, Singapore, Singapore 2. Department of Electrical & Computer Engineering, National University of Singapore, Singapore, 117576, Singapore
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Abstract: | We demonstrate a novel technique to realize a long-distance fiber sensor system based on the second-order Raman pump and amplification. With the second-order Raman pump and amplification, a gain spectrum around 1582-nm is achieved. It serves as not only the optical source for the remote fiber sensor but also the filter to intensity modulated the wavelength shift of the fiber sensor. A long-distance fiber strain sensor system is demonstrated by adopting a fiber Fabry?CPérot sensor. Experimental results show that the wavelength shift of the sensor in response to the strain is simultaneously intensity modulated by the steep slope with a high sensitivity, while it is temperature insensitive. With the side gain spectrum served as a quasi-linear filter, the sensor can also be quasi-linearly intensity-modulated. |
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