Yn. Korkishko et Va. Fedorov, STRUCTURAL PHASE-DIAGRAM OF HXLI1-XNBO3 WAVE-GUIDES - THE CORRELATIONBETWEEN OPTICAL AND STRUCTURAL-PROPERTIES, IEEE journal of selected topics in quantum electronics, 2(2), 1996, pp. 187-196
We show that proton exchanged HxLi1-xNbO3 single-crystalline solid sol
utions exhibit very complex structural chemistry, which is different f
rom those known for powders, Seven crystallographic phases have been i
dentified in HxLi1-xNbO3 layers, Correlation between the crystal struc
ture and the ordinary and extraordinary refractive indices has been ex
perimentally determined which allows us to explain some of the observe
d optical phenomena and to predict the characteristics of the great va
riety of proton exchanged waveguides.