Abstract
KTiOPO4 (KTP) has been a frequent choice for second harmonic generation (SHG) of Nd:YAG laser applications. However for high power intracavity frequency doubled Nd:YAG laser systems, we have found it is very difficult to use because of the low damage threshold, smaller acceptance angle and higher birefringence (larger walk-off angle). In order to achieve high power (more than 80 watts) of 532 nm laser light from a single Nd:YAG laser cavity, we have studied the intracavity SHG of lithium triborate (LiB3O5 or LBO), a relatively new nonlinear optical crystal discovered in 1989. Both theoretical and experimental results are discussed in terms of the damage threshold, SHG conversion efficiency, acceptance and walk- off angles, as well as the techniques for both critical and non-critical phase-matching.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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