TY - JOUR
T1 - Phase mismatch compensation of second harmonic generation with controlling boundary temperature of type-II KTP crystal in high power green laser
AU - Xu, De Gang
AU - Yao, Jian Quan
AU - Zhou, Rui
AU - Zhang, Bai Gang
AU - Wang, Peng
PY - 2005
Y1 - 2005
N2 - We reported phase mismatch compensation of second harmonic generation with controlling boundary temperature of type-II KTP crystal in high power intracavity frequency-doubled Nd:AG laser. Thermal induced phase mismatching of the KTP crystal was analyzed theoretically by numerical computations of temperature derivative of refractive indices. The temperature gradient of the KTP crystal, phase matching angles change with difference boundary temperature of the KTP crystal, and tolerance temperature was analyzed. In the experiment, when two KTP crystals of difference type n phase matching condition (Φ=23.6°,Θ=90° at 27°C temperature, Φ=24.7°, Θ=90° at 80°C temperature)were applied to compensate the phase mismatching of the type-n KTP crystals. The maximum average 532nm output power of 85 W and 110W were generated when the boundary temperature of KTP were kept in 4°C and 48.8°C respectively. The corresponding conversion efficiency is 9.03% and 11%. phase mismatching, second harmonic generation, conversion efficiency, temperature distribution, boundary temperature, KTP, temperature gradient.
AB - We reported phase mismatch compensation of second harmonic generation with controlling boundary temperature of type-II KTP crystal in high power intracavity frequency-doubled Nd:AG laser. Thermal induced phase mismatching of the KTP crystal was analyzed theoretically by numerical computations of temperature derivative of refractive indices. The temperature gradient of the KTP crystal, phase matching angles change with difference boundary temperature of the KTP crystal, and tolerance temperature was analyzed. In the experiment, when two KTP crystals of difference type n phase matching condition (Φ=23.6°,Θ=90° at 27°C temperature, Φ=24.7°, Θ=90° at 80°C temperature)were applied to compensate the phase mismatching of the type-n KTP crystals. The maximum average 532nm output power of 85 W and 110W were generated when the boundary temperature of KTP were kept in 4°C and 48.8°C respectively. The corresponding conversion efficiency is 9.03% and 11%. phase mismatching, second harmonic generation, conversion efficiency, temperature distribution, boundary temperature, KTP, temperature gradient.
UR - http://www.scopus.com/inward/record.url?scp=18944392889&partnerID=8YFLogxK
U2 - 10.1117/12.575039
DO - 10.1117/12.575039
M3 - Conference article
AN - SCOPUS:18944392889
SN - 0277-786X
VL - 5627
SP - 307
EP - 311
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
M1 - 32
T2 - High-Power Lasers and Applications III
Y2 - 8 November 2004 through 11 November 2004
ER -