Dependences of the refractive indices on the proton concentration in H:LiNbO3 waveguides |
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Authors: | Yu N Korkishko V A Fedorov |
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Institution: | (1) Moscow Institute of Electronic Technology (Technical University), 103498 Moscow, Russia |
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Abstract: | Proton-exchanged optical waveguides in lithium niobate crystals exhibit a rich variety of structures and phases. It is established
that seven HxLi1−x
NbO3 crystalline phases with a lithium niobate structure may form under various conditions of proton exchange and post-exchange
annealing. A method is proposed to determine the proton concentration in the various phases identified. Relationships are
established between the structural parameters, the proton concentration, and the ordinary and extraordinary refractive indices
of various HxLi1−x
NbO3 crystalline phases. The results can explain various optical phenomena observed in proton-exchanged waveguides and permit
prediction of the characteristics of light-guide structures.
Zh. Tekh. Fiz. 69, 47–57 (March 1999) |
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