Journal
OPTICS LETTERS
Volume 35, Issue 18, Pages 3093-3095Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.35.003093
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- U.S. Air Force Office of Scientific Research (USAFOSR) [FA9550-09-1-0233, FA9550-05-1-0180]
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Three-wave nonlinear interactions in chirped quasi-phase-matched (QPM) gratings are shown to exhibit conversion efficiency approaching 100% with increasing input pump and signal intensities, evading backconversion, as long as the idler vanishes at the input and the QPM grating is sufficiently chirped. The signal phase is described in terms of Kerr-like self- and cross-phase modulations, in the cascade chi((3)) approximation. Achieving high gain and efficiency simultaneously can lead to a large nonlinear phase, and the resulting trade-off is discussed. (C) 2010 Optical Society of America
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