In a semiconductor laser wavelength conversion device comprising a semiconductor laser beam souce, a lens, a single crystal of a non-linear optical material and a filter, the non-linear optical material is represented by the general formula, A--(Cx)--B, where (Cx) is --(CH)--or --CH.dbd.CH--C(.dbd.CH)--, A and B are each atomic group comprising a .pi.-electron conjugated structure containing at least one electron withdrawing group or one electron donating group. The device can generate a second harmonic wave having an intensity of 4 or more stronger than that of urea and having a cutoff wavelength of 420 nm or less.
该半导体激光器波长转换器件包括半导体激光束源、透镜、非线性光学材料的单晶和滤光片。其中,非线性光学材料由一般式A-(Cx)-B表示,其中(Cx)为-(CH)-或-CH.dbd.CH-C(.dbd.CH)--,A和B分别是含有至少一个电子提取基团或一个电子捐赠基团的.pi.-电子共轭结构原子团。该器件能够产生第二谐波波长,其强度比
尿素强4倍以上,并且其截止波长为420纳米或更短。