Abstract
Either α- or β-phase guides of high quality were obtained by proton exchange of x- and z-cut substrates in benzoic acid vapor. The second-harmonic-generation efficiency of z-cut samples was found to be similar to that of the substrate for x-cut samples show second-harmonic-generation efficiency that is good for and negligible for All cuts exhibit low optical losses (<0.35 dB cm-1) for and and a high optical damage threshold for
© 1999 Optical Society of America
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