Abstract.
The characteristics of intracavity second-harmonic generation (SHG) at 1.06 μm in GdCa4O(BO3)3 (GdCOB) crystals cut for different type I phase-matching (PM) directions of (θ,φ)=(66.8°, 132.3°); (19.4°, 0°); (90°, 46°) have been investigated. It was found that the intracavity SHG was significantly efficient in the PM direction of (66.8°, 132.3°), and that the intrinsic lower effective nonlinear coefficient (deff) was responsible for the less-efficient SHG in the other two directions. A maximum CW SHG output power of 2.81 W was obtained with an optical conversion efficiency of 18.7%, while the corresponding effective intracavity SHG efficiency was determined to be 41.3%. The intracavity SHG efficiency of GdCOB has been found to reach two-thirds of that obtained with type II phase-matching KTiOPO4 (KTP).
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Received: 26 April 2000 / Revised version: 3 July 2000 / Published online: 5 October 2000
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Liu, J., Xu, X., Wang, C. et al. Intracavity second-harmonic generation of 1.06 μm in GdCa4O(BO3)3 crystals . Appl Phys B 72, 163–166 (2001). https://doi.org/10.1007/s003400000432
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DOI: https://doi.org/10.1007/s003400000432