Stimulated Brillouin scattering in optical fibers excited by broad-band pump waves in the presence of feedback

Mark S. Bowers; Robert S. Afzal

doi:10.1117/12.2015825

23 May 2013 Stimulated Brillouin scattering in optical fibers excited by broad-band pump waves in the presence of feedback

Mark S. Bowers, Robert S. Afzal

Author Affiliations +

Proceedings Volume 8733, Laser Technology for Defense and Security IX; 87330I (2013) https://doi.org/10.1117/12.2015825
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

The transient theory of stimulated Brillouin Scattering (SBS) in optical fibers is used to investigate the effects of weak feedback of an incident broadband laser field. When the linewidth of the laser approaches the Brillouin frequency shift, a weak reflection of the laser field overlaps with the SBS gain and can be amplified in the fiber resulting in an apparent reduction in SBS threshold. We show that a reflection of 0.01% (-40 dB) of a laser field with a linewidth equal to the Brillouin shift can reduce the SBS threshold by a factor of 2. These results have implications on the design of high power fiber laser systems that utilize spectral broadening to suppress SBS.

Citation Download Citation

Mark S. Bowers and Robert S. Afzal "Stimulated Brillouin scattering in optical fibers excited by broad-band pump waves in the presence of feedback", Proc. SPIE 8733, Laser Technology for Defense and Security IX, 87330I (23 May 2013); https://doi.org/10.1117/12.2015825

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