VCSEL端面泵浦的全固体激光器  

VCSEL End-Pumped All-Solid-State Laser

作　　者：李溶涛 孟俊清[1] 陈晓 陈卫标[1] Li Rongtao;Meng Junqing;Chen Xiao;Chen Weibiao(Key Laboratory of Space Laser Commurication and Detect iow Techuology,Shanghai Inatitute of Optic and Fine Mechonics,Chinese Acndemy of Seiences,Shanghai 201800,China;University of Chinese Academy of Science,Beijing 100049,China)

机构地区：[1]中国科学院上海光学精密机械研究所空间激光传输与探测技术重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《中国激光》2022年第18期7-12,共6页Chinese Journal of Lasers

摘　　要：介绍了一种垂直腔表面发射激光器(VCSEL)端面泵浦的固体激光器。该激光器以VCSEL阵列端面泵浦Nd∶YAG晶体,使用二维微透镜阵列对VCSEL阵列进行准直整形,通过电光调Q方式,在100 Hz重复频率情况下,实现了脉宽为4.16 ns、能量为5.36 mJ、峰值功率为1.29 MW、光束质量为M^(2)_(x)=1.409和M^(2)_(y)=1.531的激光输出。Objective Semiconductor lasers are highly efficiency and have a small divergence angle,narrow pulse width,and good durability.They are widely used in material processing,industrial manufacturing,laser lighting,lidar,and laser communication.However,the output spot of the traditional edge-emitting semiconductor laser is elliptical and an additional beam shaping system is required.Further,it is sensitive to temperature change because the temperature drift coefficient at the central wavelength is 0.3 nm/℃.Therefore,for a wide temperature range and large temperature differences between day and night,an additional temperature control system is required,which increases the volume,cost,and complexity of the laser.Recently,vertical-cavity surface-emitting lasers(VCSELs)have been used increasingly as semiconductor laser pump sources.Compared with traditional edge-emitting semiconductor lasers,VCSELs have circular output spots with a small divergence angle,good beam quality,small temperature drift coefficient,high reliability,and low cost.A VCSEL chip contains hundreds or thousands of units in the two-dimensional(2D)array distribution.Its high-power output of hundreds of watts or even kilowatts can be realized through the 2D array arrangement.Therefore,it is a suitable pump source for compact high-power solid-state lasers.In this paper,we report a laser with a VCSEL array as the pump source.The laser has the advantages of high beam quality,small volume,compact structure,and insensitivity to temperature change.It can be used under large day-to-night temperature differences as well as rapid temperature changes.Additionally,it serves as an emission light source for applications in space.Methods The laser uses an 808-nm VCSEL array as the pump source to pump Nd∶YAG crystal via end pumping.However,directly using it to pump the Nd∶YAG crystal will lead to low power density and low pump efficiency because the VCSEL array is composed of many units and has a large luminous area.Therefore,collimating and shaping the output lase

关 键 词：激光器 固体激光器 垂直腔面发射激光器 端面泵浦 

分 类 号：TN248.1[电子电信—物理电子学]