H. Kiriyama et al., Highly efficient second-harmonic generation in novel four-pass quadrature frequency conversion, NUCL INST A, 455(1), 2000, pp. 236-238
A four-pass quadrature frequency conversion scheme was developed for achiev
ing high conversion efficiency. With this scheme, an efficiency in excess o
f 80% was achieved for frequency doubling of 1064 nm in KTP with a low inpu
t fundamental laser intensity of 76 MW/cm(2). A second-harmonic output of 4
86 mJ was obtained with 607 mJ of the input 1064 nm fundamental laser at 10
Hz. (C) 2000 Elsevier Science B.V. All rights reserved.