光学 精密工程, 2013, 21 (6): 1404, 网络出版: 2013-07-01
基于掺镁周期极化铌酸锂晶体的内腔单共振连续可调谐光参量振荡器
Intra-cavity singly resonant optical parametric oscillator based on magnesium-doped periodically poled lithium niobate
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 Optical Parametric Oscillator(OPO) intra-cavity single resonant temperature-tuning
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808 nm半导体激光抽运Nd∶YVO4晶体产生的1 064 nm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2 249~3 706 nm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10.5 W,极化周期为29.98 μm,控制温度为411 K的情况下获得了最高650 mW的中红外激光输出,对应的中心波长为3 466 nm,线宽为2.6 nm,具有较好的单色性。在7.5 W的入射功率下,最高808 nm抽运光到闲频光的转化效率达7.73%,对应输出功率为580 mW。
Abstract
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 semiconductor 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 PPMgLN to obtain the 2 249 to 3 706 nm tunable idler output. With an 808-nm pump power of 10.5 W and a polarized period of 29.98 μm, 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 808 nm 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.
苏辉, 李志平, 段延敏, 王小蕾, 朱海永. 基于掺镁周期极化铌酸锂晶体的内腔单共振连续可调谐光参量振荡器[J]. 光学 精密工程, 2013, 21(6): 1404. SU Hui, LI Zhi-ping, DUAN Yan-min, WANG Xiao-lei, ZHU Hai-yong. Intra-cavity singly resonant optical parametric oscillator based on magnesium-doped periodically poled lithium niobate[J]. Optics and Precision Engineering, 2013, 21(6): 1404.