Stimulated Brillouin scattering suppression with a chirped laser seed: comparison of dynamical model to experimental data

Eliot Petersen; Zhi Yang; Jeffrey O. White; George Rakuljic; Naresh Satyan; Arseny Vasilyev; Amnon Yariv

doi:10.1117/12.2037750

17 March 2014 Stimulated Brillouin scattering suppression with a chirped laser seed: comparison of dynamical model to experimental data

Eliot Petersen, Zhi Yang, Jeffrey O. White, George Rakuljic, Naresh Satyan, Arseny Vasilyev, Amnon Yariv

Author Affiliations +

Proceedings Volume 8961, Fiber Lasers XI: Technology, Systems, and Applications; 89613H (2014) https://doi.org/10.1117/12.2037750
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

When scaling CW single-mode fiber amplifiers to high power, the first nonlinear limitation that appears for narrowlinewidth seed lasers is stimulated Brillouin scattering (SBS). We present a dynamical simulation of Brillouin scattering in a Yb-doped fiber amplifier that numerically solves the differential equations in z and t describing the laser, Stokes and pump waves, the inversion, and the density fluctuations that seed the scattering process. We compare the model to experimental data, and show that a linearly chirped seed laser is an efficient form of SBS suppression; especially for long delivery fibers. The frequency chirp decreases the interaction length by chirping through the Brillouin resonance in a time that is short compared to the fiber transit time. The seed has a highly linear chirp of 10¹⁴ – 10¹⁶ Hz/s at 1064 nm which preserves a well-defined phase relationship in time. This method of SBS suppression retains a long effective coherence length for purposes of coherent combining, while at high chirps appears to the SBS as a large linewidth, increasing the threshold. An increase in fiber length increases the laser bandwidth as seen by the SBS, leading to a fiberlength- independent SBS threshold.

Citation Download Citation

Eliot Petersen, Zhi Yang, Jeffrey O. White, George Rakuljic, Naresh Satyan, Arseny Vasilyev, and Amnon Yariv "Stimulated Brillouin scattering suppression with a chirped laser seed: comparison of dynamical model to experimental data", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 89613H (17 March 2014); https://doi.org/10.1117/12.2037750

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