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We report on an efficient blue light generation in periodically poled LiTa03 by the frequency tripling ofa quasi-continuous 1342 nm Nd:YVO4 laser. The period of the sample was 14.778um. Blue light with an average powerof 138 mW was generated from a 18 mm long crystal in a single-pass process under an average fundamental powerof 713mW. The inteal conversion efficiency was 19.3%.