Brightness enhancement in a high-peak-power cladding-pumped Raman fiber amplifier.
We demonstrate a cladding-pumped Raman fiber amplifier (CPRFA) whose brightness-enhancement factor depends on the cladding-to-core diameter ratio. The pump and the signal are coupled independently into different input arms of a pump-signal combiner, and the output is spliced to the Raman amplifier fiber. The CPRFA generates 20 microJ, 7 ns pulses at 1100 nm at a 2.2 kHz repetition rate with 300 microJ (25.1 kW peak power) of input pump energy. The amplified signal's peak power is 2.77 kW, and the brightness-enhancement factor is 192--the highest peak power and brightness enhancement achieved in a CPRFA at any wavelength, to our knowledge.
Sridharan
Arun Kumar
AK
National Ignition Facility and Photon Science Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA. sridharan1@llnl.gov
Heebner
John E
JE
Messerly
Michael J
MJ
Dawson
Jay W
JW
Beach
Raymond J
RJ
Barty
C P J
CP