Journal
OPTICS LETTERS
Volume 33, Issue 21, Pages 2473-2475Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.33.002473
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Funding
- U.S. Air Force Office of Scientific Research (AFOSR) [FA9550-06-1.0468, FA9550-07-1-0014]
- Defense Advanced Research Projects Agency (DARPA)
- Hyperspectral Radiography Sources
- MIT Lincoln Laboratory
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We generate linearly polarized, 287 W average-power, 5.5 ps pulses using a cryogenically cooled Yb:YAG amplifier at a repetition rate of 78 MHz. An optical-to-optical efficiency of 41% is obtained at 700 W pump power. A 6 W, 0.4 nm bandwidth picosecond seed source at 1029 net wavelength is constructed using a chirped-pulse fiber amplification chain based on chirped volume Bragg gratings. The combination of a fiber amplifier system and a cryogenically cooled Yb:YAG amplifier results in good spatial beam quality at large average power. Low nonlinear phase accumulation as small as 5.1 x 10(-3) rad in the bulk Yb:YAG amplifier supports power scalability to a >10 kW level without being affected by self-phase modulation. This amplification system is well suited for pumping high-power high-repetition-rate optical parametric chirped-pulse amplifiers. (C) 2008 Optical Society of America
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