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Extension of measurement range in Brillouin optical correlation domain analysis by pump-probe switching |
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| Authors: | Ji Ho Jeong Sang Bae Lee Young Min Jhon Kwang Yong Song Je-Myung Jeong Kwanil Lee |
| Institution: | 1. Center for Opto-Electronic Convergence Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Republic of Korea 2. Sensor System Research Center, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea 3. Department of Physics, Chung-Ang University, 84 Heukseok-dong, Dongjak-gu, Seoul, 156-756, Republic of Korea 4. Department of Electrical and Computer Engineering, Hanyang University, 222 Haengdang-Dong, Seongdong-gu, Seoul, 133-791, Republic of Korea |
| Abstract: | We propose and experimentally demonstrate a novel method for the extension of the measurement range in Brillouin optical correlation domain analysis by switching the pump and probe waves for selectively inducing the stimulated Brillouin scattering (SBS) in the sensing fiber. In this scheme, two correlation peaks are located in the sensing fiber and SBS is alternatively induced at each position by pump/probe selective switching and optical attenuation. In the experiment, twice enlargement of measurement range is successfully achieved with 146-m fiber with a 10-cm spatial resolution. |
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