8.1 W全固态准连续红光Nd∶YAG激光器
LD Pumped Nd∶YAG/KTP Quasi-Continuous Wave Red Light Laser with 8.1 W Output Power
温午麒 1,2,3,*姚建铨 1,2,3丁欣 1,2,3周建勇 1,2,3李君 1,2,3魏权夫 1,2,3徐德刚 1,2,3周睿 1,2,3张强 1,2,3于意仲 1,2,3王鹏 1,2,3
1 天津大学精密仪器与光电子工程学院激光与光电子研究所, 教育部光电信息技术科学重点实验室, 天津 300072
2 南开大学、天津大学联合研究院,天津 300072
3 华中科技大学激光技术国家重点实验室,湖北 武汉 430074
摘要
报道了利用Ⅱ类临界相位匹配的KTP晶体(相位匹配角选为θ=59.9°,φ=0°)对Nd∶YAG在1.3 μm附近的振荡进行腔内倍频,产生高功率准连续红光激光的实验结果。激光器使用了一个连续运转的高功率激光二极管(LD)侧面抽运组件(组件内由30个20 W的二极管阵列呈三角形阵列分布抽运一根Nd∶YAG圆棒),使用声光调Q技术实现高重复频率输出,并选用了平-凹直腔的腔体结构。对该激光器的基频(1.3 μm波长)调Q和倍频红光的功率输出特性及光谱特性进行了研究。在LD抽运功率453 W时产生了最大输出功率8.1 W的准连续红光激光,测量了此时的M2值并给出了光强分布图。
Abstract
This paper reports the generation of high power quasi-continuous wave (Q-CW) red laser radiation by frequency-doubling a Nd∶YAG (Nd∶Y3Al5O12) laser operating at wavelength near 1.3 μm with a KTP (KTiPO4) crystal (type Ⅱ phase match, θ=59.9°, φ=0°). The laser, with plane-concave cavity structure, is employing a high power CW pump module comprised a Nd∶YAG rod side-pumped by thirty 20 W laser diode arrays (LDAs) of a triangle radial geometry, and an acousto-optic Q-switch which results in the laser high repeated Q-CW output. The laser output characteristics of fundamental and frequency-doubled wavelengths involving powers and spectra have been studied. The highest power of the quasi-CW red laser is 8.1 W, achieved at 453 W pump power of LD. The value of M2 and the distribution figure of red beam at 8.1 W output power are given in the paper.
参考文献
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温午麒, 姚建铨, 丁欣, 周建勇, 李君, 魏权夫, 徐德刚, 周睿, 张强, 于意仲, 王鹏. 8.1 W全固态准连续红光Nd∶YAG激光器[J]. 中国激光, 2004, 31(11): 1281. 温午麒, 姚建铨, 丁欣, 周建勇, 李君, 魏权夫, 徐德刚, 周睿, 张强, 于意仲, 王鹏. LD Pumped Nd∶YAG/KTP Quasi-Continuous Wave Red Light Laser with 8.1 W Output Power[J]. Chinese Journal of Lasers, 2004, 31(11): 1281.
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