SBS mitigation with 'two-tone' amplification: a theoretical model

T. J. Bronder; T. M. Shay; I. Dajani; A. Gavrielides; C. A. Robin; C. A. Lu

doi:10.1117/12.774584

22 February 2008 SBS mitigation with 'two-tone' amplification: a theoretical model

T. J. Bronder, T. M. Shay, I. Dajani, A. Gavrielides, C. A. Robin, C. A. Lu

Proceedings Volume 6873, Fiber Lasers V: Technology, Systems, and Applications; 68731R (2008) https://doi.org/10.1117/12.774584
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

Abstract

A new technique for mitigating stimulated Brillouin scattering (SBS) effects in narrow-linewidth Yb-doped fiber amplifiers is demonstrated with a model that reduces to solving an 8×8 system of coupled nonlinear equations with the gain, SBS, and four-wave mixing (FMW) incorporated into the model. This technique uses two seed signals, or 'two-tones', with each tone reaching its SBS threshold almost independently and thus increasing the overall threshold for SBS in the fiber amplifier. The wavelength separation of these signals is also selected to avoid FWM, which in this case possesses the next lowest nonlinear effects threshold. This model predicts an output power increase of 86% (at SBS threshold with no signs of FWM) for a 'two-tone' amplifier with seed signals at 1064nm and 1068nm, compared to a conventional fiber amplifier with a single 1064nm seed. The model is also used to simulate an SBS-suppressing fiber amplifier to test the regime where FWM is the limiting factor. In this case, an optimum wavelength separation of 3nm to 10nm prevents FWM from reaching threshold. The optimum ratio of the input power for the two seed signals in 'two-tone' amplification is also tested. Future experimental verification of this 'two-tone' technique is discussed.

Citation Download Citation

T. J. Bronder, T. M. Shay, I. Dajani, A. Gavrielides, C. A. Robin, and C. A. Lu "SBS mitigation with 'two-tone' amplification: a theoretical model", Proc. SPIE 6873, Fiber Lasers V: Technology, Systems, and Applications, 68731R (22 February 2008); https://doi.org/10.1117/12.774584

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available