Ml. Sundheimer et al., LARGE NONLINEAR PHASE MODULATION IN QUASI-PHASE-MATCHED KTP WAVE-GUIDES AS A RESULT OF CASCADED 2ND-ORDER PROCESSES, Optics letters, 18(17), 1993, pp. 1397-1399
Nonlinear spectral modulation and broadening have been observed in qua
si-phase-matched KTP waveguides near 850 nm, indicative of self-phase
modulation that is due to cascaded second-order processes. Numerical b
eam-propagation simulations indicate nonlinear peak phase shifts large
r than pi for 600 W of peak power in a 2.8-mm-long guide.