Generation of 7.8 W at 355 nm from an efficient and compact intracavity frequency-tripled Nd:YAG laser
Generation of 7.8 W at 355 nm from an efficient and compact intracavity frequency-tripled Nd:YAG laser
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DOI：
10.1016/j.optcom.2010.01.067
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发表时间：
2010-06
影响因子：
2.4
通讯作者：
Baitao Zhang;Hai-tao Huang;J. Yang;Jingliang He;C. Zuo;Jin-long Xu;X. Yang;Shuang Zhao
中科院分区：
文献类型：
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作者：
Baitao Zhang;Hai-tao Huang;J. Yang;Jingliang He;C. Zuo;Jin-long Xu;X. Yang;Shuang Zhao
采用二极管侧面泵浦声光调Q Nd：YAG激光器，经腔内三倍频，获得了355 nm高功率准连续紫外激光输出。第二类临界相位匹配的KTP和LBO晶体分别用于二次谐波产生和三次谐波产生。在抽运功率为180 W、脉宽为50 ns、频率为8 kHz的条件下，获得了平均功率为7.8W的355 nm激光输出，抽运光-紫外光转换效率为4.3%。峰值功率和单脉冲能量分别为18.8kW和938μJ。它的远场发散度约为2.1mrad。355 nm激光器在6.3W输出功率下工作2小时不稳定性小于1%。
A high power, quasi-continuous wave ultraviolet laser at 355nm was obtained by intracavity frequency tripling of a diode side-pumped acousto-optic (AO) Q-switched Nd:YAG laser. Type II critical phase-matched KTP and LBO crystals were used for the second harmonic generation and the third harmonic generation, respectively. Under the pump power of 180W, 7.8W average output power at 355nm was obtained at 8kHz with the pulse width of 50ns, corresponding to the pump-to-ultraviolet conversion efficiency of 4.3%. The peak power and single pulse energies were estimated to be 18.8kW and 938μJ. Its far-field divergence was measured to be about 2.1mrad. The instability of the 355nm laser was less than 1% at an output power of 6.3W for 2 operation hours.