Ml. Bortz et al., INCREASED ACCEPTANCE BANDWIDTH FOR QUASI-PHASEMATCHED 2ND-HARMONIC GENERATION IN LINBO(3) WAVE-GUIDES, Electronics Letters, 30(1), 1994, pp. 34-35
The authors demonstrate waveguide second harmonic generation using a v
ariable-spaced phase-reversed quasi-phasematched grating that has an a
cceptance bandwidth 15 times greater than a uniformly quasi-phasematch
ed interaction of the same length.