Journal
OPTICS EXPRESS
Volume 18, Issue 22, Pages 22686-22692Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.022686
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Funding
- USA-Israel Binational Science Foundation (BSF)
- Israel Science Foundation (ISF)
- Marie Curie International Reintegration Grant (IRG)
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We show that a sawtooth phase-modulation is the optimal profile for grating assisted phase matching (GAPM). Perfect (sharp) sawtooth modulation fully corrects the phase-mismatch, exhibiting conversion equal to conventional phase matching, while smoothened, approximate sawtooth structures are more efficient than sinusoidal or square GAPM modulations that were previously studied. As an example, we demonstrate numerically optically-induced sawtooth GAPM for high harmonic generation. Sawtooth GAPM is the most efficient method for increasing the conversion efficiency of high harmonic generation through quasi-phase-matching, with an ultimate efficiency that closely matches the ideal phase-matching case. (C) Optical Society of America 2010
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