Journal of Applied Sciences ›› 2018, Vol. 36 ›› Issue (1): 20-40.doi: 10.3969/j.issn.0255-8297.2018.01.002

• Optical Fiber Sensors Technology • Previous Articles     Next Articles

Stimulated Brillouin Scattering in Optical Fiber Sensing Systems

MENG Zhou, CHEN Mo, CHEN Wei, HU Xiao-yang, WANG Jian-fei   

  1. College of Meteorology and Oceanology, National University of Defense Technology, Changsha 410073, China
  • Received:2017-12-13 Online:2018-01-31 Published:2018-01-31

Abstract:

As an important nonlinear effect in fibers, stimulated Brillouin scattering (SBS) has significant influence on fiber sensing systems. SBS increases phase noise and deteriorates detection sensitivity in a long-haul interferometric sensing system, therefore it is critical to study SBS suppression techniques. On the other hand, SBS can be used in distributed sensing of temperature and strain. Distributed sensing techniques based on SBS have attracted much research attention. Meanwhile, lasers with ultra-narrow linewidth based on SBS have wide applications in coherent sensing systems due to their unique characteristics. This paper explains the effects of SBS on interferometric sensing systems, and compares some SBS suppression techniques. Major performance criteria of a Brillouin time domain analyzer and several techniques for improvements are introduced. Finally, the development history and present situation of the ultra-narrow linewidth Brillouin/erbium fiber lasers are presented.

Key words: stimulated Brillouin scattering (SBS), distributed Brillouin sensor, fiber sensor, interferometric sensor, Brillouin laser

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