摘要
为了用简单、紧凑的谐振腔获得稳定的激光输出,大的调谐范围和转换效率,设计了信号光单共振V型光学参量振荡(OPO)腔,采用内腔式抽运周期极化掺镁铌酸锂晶体(PPMgLN)的光学参量振荡技术获得了连续中红外宽波段调谐激光的输出。用808nm半导体激光抽运Nd∶YVO4晶体产生的1 064nm激光作为光参量振荡的基频光,通过V型腔灵活控制激光光斑并改变PPMgLN的极化周期和控制温度实现了2 249～3 706nm中红外的连续宽波段调谐激光输出。在半导体激光抽运功率为10.5W,极化周期为29.98μm,控制温度为411K的情况下获得了最高650mW的中红外激光输出,对应的中心波长为3 466nm,线宽为2.6nm,具有较好的单色性。在7.5W的入射功率下,最高808nm抽运光到闲频光的转化效率达7.73%,对应输出功率为580mW。
To obtain stable laser outputs, bigger turning ranges and higher transfer efficiencies by a simple and compact resonance cavity, a V-type Optical Parametric Oscillator （OPO） pumped by a 1 064 nm Nd ＂ YVO4 laser is designed, and broadband wavelength-tunable, continuous-wave （CW） mid-infrared laser sources are obtained. The Nd YVO4 laser crystal is pumped by a 808 nm semicon- ductor laser to generate a 1 064 nm laser as the fundamental frequency light ,and the V-type cavity is used to control laser spots and to change the grating period and temperature of the PPMgL.N to obtain the 2 249 to 3 706 nm tunable idler output. With an 808-nm pump power o{ 10.5 W and a polarized period o{ 29.98/~m, a maximum idler output power up to 650 mW at 3 466 nm is achieved under the PPMgLN to be set at 411 K, which shows a better monochromaticity and is corresponding to a center wavelength of 3 466 nm and line width of 2.6 nm. Moreover, when 80gnm pump power is 7.5 W, the maximum optical-to-optical conversion efficiency can be up to 7.73% and the corresponding output power is 580 mW.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2013年第6期1404-1409,共6页
Optics and Precision Engineering
基金
中国科学院百人计划资助项目
福建省重点研究项目(No.2011HZ001-3)
浙江省自然科学基金资助项目(No.LY12F05003
LQ13F050004)
温州市科技计划资助项目(No.G20110002)
中科院光电材料化学与物理重点实验室资助项目(No.2008DP173016)
关键词
镁掺杂周期极化铌酸锂晶体
光学参量振荡器
内腔单共振
温度调谐
magnesium-doped periodically poled lithium niobate crystal
Optical Parametric Oscillator （OPO）
intra-cavity single resonant
temperature-tuning
