Abstract

Recent progress in guided-wave lasers and quasi-phase-matched (QPM) second harmonic generation (SHG) devices fabricated in lithium niobate and lithium tantalate will be reviewed. Significant new results from research carried out by us will also be presented. Relevant aspects of the proton exchange waveguide formation process will be examined. Because of the major limitations encountered so far with lithium niobate and tantalate, alternative materials with potentially superior properties should be considered and these are touched on at the end of the paper.

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