D. Eger et al., OPTICAL CHARACTERIZATION OF KTIOPO4 PERIODICALLY SEGMENTED WAVE-GUIDES FOR 2ND-HARMONIC GENERATION OF BLUE-LIGHT, Journal of applied physics, 74(7), 1993, pp. 4298-4302
Periodically segmented waveguides were fabricated by the ion exchange
process in KTiOPO4. The waveguides were characterized by measuring the
spectra of the transmitted and reflected guided infrared light and of
the second-harmonic-generated power. The near-field distribution of t
he fundamental and second-harmonic wave was also investigated. Infrare
d to blue light conversion efficiency up to 250% W-1 cm-2 was obtained
. Waveguide characteristics were calculated by replacing the segmented
structure with an equivalent continuous waveguide. Good agreement bet
ween the calculated and measured values was obtained.