LD pumped Q-CW Nd:YAG/KTP red laser

Wu Qi Wen, Xin-Ding, Zhi Qiang Cai, Jia Ning Zhou, Lei Zou, Meng Zhu, Yi Zhong Yu, Peng Wang, Jian Quan Yao

Research output: Contribution to journalConference articlepeer-review


High-power red laser are of great interest in the fields of medical application, laser display and also as a pumping source for tunable lasers such as Cr:LiSAF. This letter reports the generation of a 12W Q-CW red laser beam by intracavity frequency-doubling of a Nd:YAG laser operating at 1.3μm with a KTP crystal. A laser module that consisting of a Nd:YAG rod side-pumped by thirty 20W LDs of a triangle radial pump geometry, a acousto-optic Q switch and a KTP crystal were used in the experiment. Because the efficiency of SHG is sensitive to the type II phase-matching angles of KTP, we calculate the value of phase-matching angles according to several of Sellemier equations of KTP, and modify the phase-matching angles to θ=59.9° and φ=0° by experiment. The maximum average power of 12W of red laser is achieved at 10KHz when the pump power of LDs is about 470 W.

Original languageEnglish
Article number91
Pages (from-to)449-452
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2005
EventHigh-Power Lasers and Applications III - Beijing, China
Duration: 8 Nov 200411 Nov 2004


  • Frequency-doubling
  • KTP crystal
  • Ld pumped laser
  • Nd:YAG
  • Red laser


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