BRILLOUIN OPTICAL TIME DOMAIN ANALYZER OF CHAOTIC LASER-RELATED INTEGRATED OPTICAL FIBER RAMAN AMPLIFIER

摘要

A Brillouin optical time domain analyzer of a chaotic laser-related integrated optical fiber Raman amplifier, manufactured by using a chaotic laser-related principle, an optical fiber-stimulated Raman scattered light amplification effect, a strain of coherently amplified Brillouin scattered light, a temperature effect, and an optical time domain reflection principle. In the Brillouin optical time domain analyzer of the chaotic laser-related integrated optical fiber Raman amplifier, spatial resolution of a sensing system is improved by correlation processing a backward probing light of a sensing optical fiber and a local reference light. The difficulty of the optical fiber Brillouin optical time domain analyzer requiring a rigorous locking on a probe laser and a pump laser frequency is solved by employing a continuous-operation high power optical fiber Raman laser as a pump light source for the Brillouin optical time domain analyzer. By using a broadband optical fiber Raman amplifier to replace a narrowband optical fiber Brillouin amplifier, the gain of stimulated Brillouin scattered light backward correlation amplified is increased, the signal-to-noise ratio of the sensing system is improved, and correspondingly the measurement length and the measurement precision of the sensing system are improved.