1.2W中红外ZnGeP_2光参量振荡器(英文)  

1.2 W ZnGeP_2 optical parametric oscillator

作　　者：王月珠[1] 姚宝权[1] 鞠有伦[1] 贺万骏[1] 

机构地区：[1]哈尔滨工业大学可调谐激光技术国家重点实验室,黑龙江哈尔滨150001

出　　处：《强激光与粒子束》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)

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.

关 键 词：光参量振荡器 ZNGEP2 Tm Ho:GdVO4激光器 

分 类 号：TN248[电子电信—物理电子学]