材料科学
光学
光学参量振荡器
皮秒
激光器
紫外线
光纤激光器
激光束质量
栅栏
光电子学
能量转换效率
物理
激光束
作者
Kavita Devi,S. Chaitanya Kumar,M. Ebrahim-Zadeh
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2016-10-11
卷期号:41 (20): 4799-4799
被引量:3
摘要
We report a compact, fiber-laser-based, high-repetition-rate picosecond source for the ultraviolet (UV), providing multi-tens of milliwatt of average power across 329-348 nm. The source is based on internal sum-frequency-generation (SFG) in a singly resonant optical parametric oscillator (OPO), synchronously pumped at 532 nm by the second harmonic of a picosecond Yb-fiber laser at 80 MHz repetition rate. Using a 30-mm-long single-grating MgO:sPPLT crystal for the OPO and a 5-mm-long BiB3O6 crystal for intracavity SFG, we generate up to 115 mW of average UV power at 339.9 nm, with >50 mW over 73% of the tuning range, for 1.6 W of input pump power. The UV output exhibits a passive rms power stability of ∼2.9% rms over 1 min and 6.5% rms over 2 h in high beam quality. Angular acceptance bandwidth and cavity detuning effects have also been studied.
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