Development of the distributed Brillouin sensor with high spatial and frequency resolution

Yun Li
This thesis includes studies of improving the performance of the distributed fiber optic sensor based on Brillouin scattering, especially focusing on spatial resolution and frequency resolution. A novel distributed Brillouin sensor based on offset locking of two distributed feedback lasers has been developed. With offset locking technique, the beat frequency of two lasers can not only be locked together but also be tuned over a wide range of more than 1GHz. Moreover, a lock-in amplifier...
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