Abstract: A diode-pumped single-frequency Nd: YVO₄/KTP intracavity frequency-doublingcw laser has been demonstrated by the precise temperature control of the Nd: YVO₄, KTP and diode Laser. The single-frequency output power of 40.4mW at 532nm was obtained for an incident power of 515mW. The reasons of the single-frequency operation of the intracavity frequency-doubling Nd: YVO₄/KTP laser are analyzed. It is derived in theory and verified in experiment that the frequency drift of free-running laser can be decreased by increasing the cavity length. The new I₂ absorption lines besides which were recommended by CCDM in 1997 have been observed using the single-frequency Nd: YVO₄/KTP laser at 532nm.

Key words: Nd: YVO₄ crystal, KTP crystal, single-frequency, 532nm laser, I₂ absorption lines

摘要： 用Nd: YVO₄/KTP内腔倍频激光器在515mW抽运时，获得了40.4mW的单频532nm绿光。分析了获得单频运转的原因，并从理论上分析、实验中验证了用增加腔长的办法，可减小自由运转激光器的频率漂移。用其单频输出观测到1997年国际米定义咨询委员会(CCDM)推荐谱线以外的一些新的I₂ 吸收谱线。

关键词: Nd:YVO4晶体, KTP晶体, 单频运转, 532nm激光, 碘吸收谱线