Walk-off Compensated 266-nm Generation with Two β-BaB2O4 Crystals |
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| Authors: | Corinne DROZ Hikaru KOUTA Yasuhiko KUWANO |
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| Affiliation: | (1) Functional Materials Research Laboratory, NEC Corporation, Kawasaki 216-8555, Japan;(2) Present address: Institute of Microtechnology, University of Neuchatel, 2000 Neuchatel, Switzerland |
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| Abstract: | A walk-off compensation arrangement of two β-BaB2O4 (BBO) crystals is used to generate 266-nm (4ω) light from 532-nm (2ω) light that is produced by an intracavity frequency-doubled Nd:YAG laser. While this arrangement is effective in terms of conversion efficiency, back conversion from 4ω to 2ω can easily occur in the second BBO when the phase difference between the 2ω and 4ω in the air gap between the two crystals shifts to ϖ. Performance characteristics are discussed here with particular reference to the angular bandwidth of the second BBO. |
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| Keywords: | β -BaB2O4 crystal (BBO) walk-off compensation 266-nm generation back conversion angular bandwidth |
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