Three-Wave Nonlinear Interactions in KTiOPO4 (KTP) and KTP Isomorphs
Abstract
This document reports an investigation of three-wave interactions in positive (nonlinear) biaxial crystals-specifically, the crystal KTiOPO4 (KTP) and its crystallographic isomorphs: RbTiOP04 (RTP), KTiOAs04 (KTA), RbTiOAs04 (RTA), and CsTiOAsO4 (CTA). The results are characterized in terms of phase matching angles, effective nonlinear coefficients, and walkoff angles for the optical beams. In phase matching angles, RTP and CTA showed larger variations in theta (i.e., were more birefringent) than the other isomorphs (which were more uniaxial-like). Where KTP did not have the largest d (eff) the difference from the isomorph which did was typically no more than 0.7 pm/V. Although overall walkoff was less than 3 deg for all isomorphs; the arsenates had around half the walkoff of the phosphates. Strictly from a performance characteristics basis, for uses at wavelengths less than 2.75 microns there is little reason to select one of the other isomorphs over KTP. RTP is acceptable for OPO usage to 3.17 microns, though an arsenate, CTA, is a better choice (higher d (eff) less walkoff, and negligible absorption). Above 3.2 microns, the arsenates, with their smaller walkoff angles and minimal absorption losses, are considerably better choices than the phosphates.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 14, 1993
- Accession Number
- ADA274079
Entities
People
- Dale L. Fenimore
- Kenneth L Schepler
Organizations
- Wright Laboratory