双端泵浦Nd^(3+)掺杂MgO:LiNbO_(3)正交偏振双波长连续激光调控  

Regulation of orthogonally polarized dualwavelength continuous wave laser based on double-end pumped Nd^(3+) doped MgO:LiNbO^(3)

作　　者：刘鸿志 王宇恒 郑浩 赵云峰 于永吉 金光勇 Liu Hong-Zhi;Wang Yu-Heng;Zheng Hao;Zhao Yun-Feng;Yu Yong-Ji;Jin Guang-Yong(Jilin Provincial Key Laboratory of Solid Laser Technology and Application,School of Science,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学理学院,吉林省固体激光技术与应用重点实验室,长春130022

出　　处：《物理学报》2021年第18期146-153,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11974060,U20A20214);吉林省科技厅中青年科技创新领军人才及团队项目(批准号:20190101004JH)资助的课题.

摘　　要：报道了一种采用双端泵浦的Nd^(3+)离子掺杂MgO:LiNbO_(3)正交偏振双波长激光器,并对正交偏振双波长激光输出进行调控.基于晶体的偏振荧光光谱,对1084与1093 nm的双波长激光振荡机理进行分析,建立晶体热透镜焦距与受激发射截面比之间的关系,并推导出1084及1093 nm双波长共振区间,给出通过改变谐振腔腔型结构调控双波长激光输出的方法.在实验中采用813 nm的半导体激光器双端泵浦a切的Nd:MgO:LiNbO_(3)晶体,测量了1084与1093 nm两种波长的输出规律,并对输出波长进行调控.最终得到了6.02 W的1093 nm和3.02 W的1084 nm单波长激光输出,在X,Y方向上的光束质量分别为M_(X)^(2)=1.70和M_(Y)^(2)=1.81.在28 W泵浦注入功率下获得了4.58 W的双波长激光输出,实验结果与理论分析相符合.为正交偏振双波长的可控输出及应用奠定了理论和实验基础.In this paper,an orthogonally polarized dual-wavelength laser based on dual-end pumped Nd^(3+)doped MgO:LiNbO_(3) is reported.Besides,the output wavelength of the orthogonally polarized dual-wavelength is regulated.According to the crystal character,the polarized fluorescence spectrum of the crystal is chosen as the starting point.The oscillation mechanism of the dual-wavelength Nd^(3+)doped MgO:LiNbO_(3) laser at 1084 nm and 1093 nm is analyzed theoretically.The relationship between the focal length of the crystal thermal lens and the stimulated emission cross-sectional ratio is established,and the effects of different temperatures on the output of single-wavelength Nd^(3+)doped MgO:LiNbO_(3) laser and on the output of dual-wavelength Nd^(3+)doped MgO:LiNbO_(3) laser are analyzed.In addition,The single-wavelength output region of 1084 nm and 1093 nm are derived respectively,and the mixed dual-wavelength working area at 1084 nm and 1093 nm are also given.The influences of different resonator parameters on the output dual-wavelength Nd^(3+)doped MgO:LiNbO_(3) laser are analyzed.It is worth mentioning that a method of adjusting the output of dual-wavelength laser by changing the resonant cavity structure is given.In the experiment,a-cut Nd:MgO:LiNbO_(3) crystal is double-end pumped by an semiconductor laser,of which the output wavelength is 813 nm.The output law of the two wavelengths of 1084 nm and 1093 nm is summarized.The output wavelength is regulated.When the laser cavity is not inserted by other optical elements,the maximum output power of 4.58 W at 1084 nm/1093 nm dual-wavelength laser under the pump power is 28 W and the pure single-wavelength laser maximum output power of 3.02 W at 1084 nm and 6.02 W at 1093 nm are obtained.The beam quality factor in the X-and Y-direction are M_(X)^(2)=1.70 and M_(Y)^(2)=1.81, respectively. The experimental results are in agreement with the theoretical analysis results. According to the change of the resonator parameters, the 1084 nm and 1093 nm pure single-wavelength lase

关 键 词：1084/1093 NM 双波长 ND:MGO:LINBO3 正交偏振 波长调控 

分 类 号：TB34[一般工业技术—材料科学与工程] TN248[电子电信—物理电子学]