The thermal effect analysis in the high power frequency-doubled Nd:YAG Laser |
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| Authors: | Yao Jian-quan Xu De-gang and Wang Yu-ye |
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| Institution: | (1) College of Precision Instrument and Opto-Electronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin, 300072, China;(2) Key Lab. of Optoelectric Information Science and Technology, Ministry of Education, Tianjin University, Tianjin, 300072, China |
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| Abstract: | In the high power frequency-doubled Nd:YAG Laser, the temperature inside a nonlinear crystal will become non-uniform due to
the absorbtion of the fundamental and second harmonic waves, leading to phase mismatch, conversion efficiency reduction and
output power instability. This phenomenon appears severe in the high-power high-repetition rate laser system. In this paper,
temperature distribution inside a KTP crystal was analyzed by solving the thermal conductivity equation. According to the
temperature distribution of the KTP, we have theoretically calculated the optimal phase matching angles, tolerance angles
and walk-off angles of type II KTP crystal as a function of temperature.
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Translated from Chinese Journal of Quantum Electronics, 2005,22 (4) (in Chinese) |
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| Keywords: | high power frequency doubled crystal thermal effect phase matched tolerance angles walk-off angles |
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