A simple multipass configuration (MPC) is designed using twin crystals that substantially enhances the conversion efficiency of extra cavity SHG by simultaneous employment of focusing and compensation of double refraction. A newly developed crystal lithium tetraborate (Li/sub 2/B/sub 4/O/sub 7/ or LB4) to demonstrate the feasibility of the scheme since the crystal has effective nonlinearity which is only 1/6th times that of KDP. The configuration improves the conversion efficiency of SHG in this crystal from 4.7 to 21% at the same level of fundamental intensity. Thus the designed MPC can be used for any other nonlinear crystals with higher nonlinearity as well.
Large enhancement of second harmonic generation in Li/sub 2/B/sub 4/O/sub 7/ crystals
2004-01-01
71134 byte
Conference paper
Electronic Resource
English
Large Enhancement of Second Harmonic Generation in Li~2B~4O~7 Crystals
British Library Conference Proceedings | 2004
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