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Proceedings Article

Comparison of stimulated Brillouin scattering thresholds and spectra in nonpolarization-maintaining and polarization-maintaining passive fibers

[+] Author Affiliations
Justin B. Spring, Timothy H. Russell, Thomas M. Shay, Richard W. Berdine, Anthony D. Sanchez, Benjamin G. Ward

Air Force Research Lab. (USA)

Won B. Roh

Air Force Institute of Technology (USA)

Proc. SPIE 5709, Fiber Lasers II: Technology, Systems, and Applications, 147 (May 05, 2005); doi:10.1117/12.591035
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From Conference Volume 5709

  • Fiber Lasers II: Technology, Systems, and Applications
  • L. N. Durvasula; Andrew J. W. Brown; Johan Nilsson
  • San Jose, CA | January 22, 2005

abstract

Stimulated Brillouin Scattering (SBS) is a polarization-dependent, nonlinear process that is often the limiting factor for high-power fiber laser applications. We report the results of experiments measuring the SBS thresholds and the SBS gain bandwidths in several passive optical fibers. Fibers with nearly identical mode-field diameters and loss coefficients from different manufacturers were selected. Observations from these experiments indicate that the SBS gain coefficient for fibers from different manufacturers varied significantly resulting in a 70% deviation in SBS threshold. Also, polarization-maintaining (PM) fiber exhibited a significant increase in the SBS threshold for a linearly polarized pump beam that is launched into the PM fiber at 45° relative to the fiber's slow axis. This increase in threshold was not mirrored in non-PM fiber. These results suggest that the polarization multiplier in the SBS threshold equation may be highest when a PM fiber is used with the appropriate launch conditions, rather than a non-PM conventional single-mode fiber. We will present the experimental results and a theoretical model demonstrating the polarization dependent gain properties in both PM and non-PM fiber.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Justin B. Spring ; Timothy H. Russell ; Thomas M. Shay ; Richard W. Berdine ; Anthony D. Sanchez, et al.
"Comparison of stimulated Brillouin scattering thresholds and spectra in nonpolarization-maintaining and polarization-maintaining passive fibers", Proc. SPIE 5709, Fiber Lasers II: Technology, Systems, and Applications, 147 (May 05, 2005); doi:10.1117/12.591035; http://dx.doi.org/10.1117/12.591035


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