Share Email Print

Proceedings Paper

SBS suppression through seeding with narrow-linewidth and broadband signals: experimental results
Author(s): Chunte Lu; Iyad Dajani; Clint Zeringue; Christopher Vergien; Leanne Henry; Ahmed Lobad; Thomas M. Shay
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We present experimental verification of a novel technique to suppress stimulated Brillouin scattering (SBS) in single frequency fiber amplifiers. This technique relies on seeding with a combination of broadband and single frequency laser beams to allow for efficient laser gain competition between the two signals. In the experiment, a monolithic fiber configuration was used. Broadband 1045 nm light and single frequency 1064 nm light were coupled into an Yb-doped gain fiber. With appropriate selection of seed power ratio, we were able to generate an output signal predominantly comprised of 1064 nm light while simultaneously suppressing the back-scattered Stokes light. The slope efficiency for the two-tone amplifier was approximately 78%; slightly below that of a single-tone amplifier. The SBS threshold for the former, on the other hand, was appreciably higher than that of the latter which is in excellent agreement with the theory. In preliminary implementation of this technique at high power, we generated close to 100 W without encountering the SBS threshold. Finally, we show numerically that due to a favorable thermal gradient much higher powers can be obtained.

Paper Details

Date Published: 17 February 2010
PDF: 8 pages
Proc. SPIE 7580, Fiber Lasers VII: Technology, Systems, and Applications, 75802L (17 February 2010); doi: 10.1117/12.842279
Show Author Affiliations
Chunte Lu, Air Force Research Lab. (United States)
Iyad Dajani, Air Force Research Lab. (United States)
Clint Zeringue, Air Force Research Lab. (United States)
Christopher Vergien, Air Force Research Lab. (United States)
Leanne Henry, Air Force Research Lab. (United States)
Ahmed Lobad, Air Force Research Lab. (United States)
Thomas M. Shay, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 7580:
Fiber Lasers VII: Technology, Systems, and Applications
Kanishka Tankala, Editor(s)

© SPIE. Terms of Use
Back to Top