Chirped Laser Seeding for SBS Suppression in a 100-W Pulsed Erbium Fiber Amplifier
Creators
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1.
United States Army Research Laboratory
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2.
Fibertek (United States)
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3.
NP Photonics (United States)
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4.
California Institute of Technology
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5.
Viavi Solutions (United States)
Abstract
A pulsed Er/Yb fiber amplifier is seeded with a frequency-chirped diode laser for the purpose of suppressing stimulated Brillouin scattering (SBS), as an alternative to the conventional broadband seed. SBS in the final stage of the amplifier limits the output power. A chirp of 5 ·10^(15) Hz/s is seen to increase the SBS threshold by nine times, compared with the case with no chirp. The final stage of the amplifier is modeled with a system of equations that are solved for the laser field, Stokes field, acoustic field, pump power, amplified spontaneous emission power, Yb inversion, and Er inversion, as a function of z and t. The experimental and theoretical results are in good agreement. The SBS threshold scales linearly with chirp, when the effective seed linewidth (the product of chirp and fiber transit time) is much greater than the Brillouin linewidth.
Additional Information
© 2015 IEEE. Manuscript received January 5, 2015; revised March 18, 2015; accepted April 6, 2015. Date of publication April 30, 2015; date of current version May 8, 2015. This work was supported in part by the U.S. Army Research Office under Grant W911NF-11-2-0081 and in part by the High Energy Laser Joint Technology Office under Contract 11-SA-0405.Additional details
Identifiers
- Eprint ID
- 57942
- DOI
- 10.1109/JQE.2015.2425963
- Resolver ID
- CaltechAUTHORS:20150602-134628255
Related works
- Describes
- 10.1109/JQE.2015.2425963 (DOI)
Funding
- Army Research Office (ARO)
- W911NF-11-2-0081
- High Energy Laser Joint Technology Office
- 11-SA-0405
Dates
- Created
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2015-06-02Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field