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High-repetition-rate distributed Brillouin sensor based on optical correlation-domain analysis with differential frequency modulation
- Authors
- Song, Kwang Yong; Kishi, Masato; He, Zuyuan; Hotate, Kazuo
- Issue Date
- Jun-2011
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS LETTERS, v.36, no.11, pp 2062 - 2064
- Pages
- 3
- Journal Title
- OPTICS LETTERS
- Volume
- 36
- Number
- 11
- Start Page
- 2062
- End Page
- 2064
- ISSN
- 0146-9592
1539-4794
- Abstract
- A kind of high-repetition-rate distributed Brillouin sensor is proposed and experimentally demonstrated based on optical correlation-domain analysis with differential frequency modulation, where the optical frequencies of the pump and the probe waves are modulated at slightly different RFs so that the temporal position of the measurement is continuously and repeatedly swept along a fiber under test. A distribution map of Brillouin frequency variation along a 100m optical fiber is acquired at a repetition rate of 20 Hz with an accuracy of +/- 2.5 MHz and a spatial resolution of about 80cm. (C) 2011 Optical Society of America
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