Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province

Taiyuan, China

Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province

Taiyuan, China
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Zhang Y.,Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province | Zhang Y.,Taiyuan University of Technology | Zhang M.,Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province | Zhang M.,Taiyuan University of Technology | And 8 more authors.
Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering | Year: 2016

The influence of laser linewidth on a stimulated Brillouin scattering threshold is analyzed theoretically, and a linewidth variable laser source made of noise-modulated distributed-feedback semiconductor laser is used in the stimulated Brillouin scattering threshold measurement system. Experimental results show that the power spectrum of the linewidth variable laser source is similar to that of the noise signal used in the experiment, and the optical spectrum is broadened significantly compared with that of the distributed-feedback semiconductor laser. When the noise amplitude used in the linewidth variable laser source raises from 0 to 400 mV, the threshold of stimulated Brillouin scattering in a 900 m single-mode fiber increases by 7.6 dB, from 106 to 616 mW. Therefore the proposed method can be applied to increase the stimulated Brillouin scattering threshold effectively thus increasing the transmission light power in long-distance optical fiber communication system and the power over fiber system. © 2016, Science Press. All right reserved.

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