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Opt Express. 2014 Apr 7;22(7):7544-9. doi: 10.1364/OE.22.007544.

Backward frequency doubling of near infrared picosecond pulses.

Abstract

We report on backward second-harmonic generation using ps laser pulses in congruent lithium niobate with 3.2 ┬Ám periodic poling. Three resonant peaks were measured between 1530 and 1730 nm, corresponding to 16th, 17th and 18th quasi-phase-matching orders in the backward configuration, with a conversion efficiency of 4.75 x 10(-5%)/W for the 16th order. We could also discriminate the contributions from inverted domains randomized in duty-cycle.

PMID:
24718128
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