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Accession Number:
ADA289147
Title:
Growth and Evaluation of Nonlinear Optical Crystals for Laser Applications: Lithium Borate, Barium Borate and Silver Gallium Selenide.
Descriptive Note:
Final technical rept. 1 Aug 90-30 Jun 94,
Corporate Author:
STANFORD UNIV CA CENTER FOR MATERIALS RESEARCH
Report Date:
1994-12-08
Pagination or Media Count:
96.0
Abstract:
This report summarizes a four year program on the development of high efficiency nonlinear optical materials. Major achievements were the development of effective top-seeded solution growth techniques for beta-barium borate BBO and lithium triborate LBO. BBO crystals were also grown for the first time in the US by the direct melt growth technique, a metastable method that leads to significantly higher growth rates than the commercial solution-growth technique. High quality crystals were made available for optical property determinations and nonlinear optical device development at government and commercial laboratories. Additional accomplishments involved development of an optimum heat-treatment technology for eliminating optical scattering centers from as-grown crystals of silver gallium selenide. Cooperative programs were carried out with NRL to quantify the effects of intrinsic and extrinsic defects on residual absorption. It was discovered that silver gallium selenide and silver gallium sulfide crystals grown from silver-rich solutions are free of anomolous absorption in the 2 micron waveband which is currently the major problem limiting generation of high intensity, tunable 3-5 micron radiation by OPO methods using these materials. A new nonlinear optical material, La,GdSc3BO34 has been identified for future study.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
