摘要
报导了利用Tm,Ho：GdVO4激光器抽运双谐振ZnGeP2光参量振荡器实验研究。Tm（5％），Ho（0．5％）：GdVO4晶体采用液氮制冷方式，工作在77K温度条件下。以25W波长为800nm的光纤耦合激光二极管抽运，2μm激光最大平均功率7W，脉冲宽度小于30ns．脉冲重复频率5kHz到20kHz可调。非线性频率转换晶体ZnGeP2长15mm．55°切割，OPO谐振腔为平平腔，腔长约25mm。在5W的2μm激光抽运下，脉冲重复频率10kHz。实现了信号光3．7μ及闲频光4．5μ中红外激光输出，参量光脉冲宽度为15～17ns，最大平均功率大于1．2W，光-光转换效率为20％。测量参量光输出光束全宽度远场发散角4mrad，光束质量M^2因子小于3。
A doubly resonant ZnGeP2 （ZGP） optical parametric oscillator pumped by a Tm, Ho.. GdVO4 laser is investigated. High pulse repetition frequency of 10 kHz cryogenic Tm（5%）, Ho（0.5%）：GdVO4 laser at 2.05μm was utilized as pumping source for ZnGeP2 OPO. The stable pulse train with duration of 23 ns was achieved from Tm, Ho：GdVO4 laser pumped by a continuous wave fiber-coupled laser diode at 801 nm. The GdVO4 host exhibited good thermo-optical property, experiencing greater than 12 kW/cm^2 pump density. The ZGP OPO generated a total combined output of 1.2 W at 3.75 μm and 4.52μm under pumping power of 5.3 W, corresponding eonversi0n efficiency of 23 % from incident 2 μm laser power to mid-IR output.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2005年第B04期163-166,共4页
High Power Laser and Particle Beams
基金
Supported by the Scientific Research Foundation of Harbin Institute of Technology(HIT200214)
