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Thermal Effect in KTP Crystals During High Power Laser Operation |
| YAO Jian-Quan;YU Yi-Zhong;CHEN Jin;ZHANG Fan;WANG Peng;WANG Tao;ZHANG Bai-Gang |
| Institute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronics Engineering, Optoelectronic Information Science and Technology Laboratory, Tianjin University, Tianjin 300072
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| Cite this article: |
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YAO Jian-Quan, YU Yi-Zhong, CHEN Jin et al 2001 Chin. Phys. Lett. 18 1356-1359 |
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Abstract We report the theoretical and experimental studies of the thermal effect of the KTP crystal during high power operation. From the dependence of the refractive index temperature coefficients on wavelength, the dependence of the optimum phase-matching angles on temperature is derived. In the experiment, the angle of the frequency-doubled KTP crystal is tilted to compensate for the thermal effect and to obtain ΔФ = 0.7°when the green laser output power is 30W and the KTP crystal temperature about 80°C. We obtained the highest stable output power greater than 40W with an L-shape flat-flat intracavity frequency-doubled Nd:YAG laser. The experimental results are very consistent with the theoretical analysis.
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| Keywords:
42.65.Ky
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Published: 01 October 2001
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| PACS: |
42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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