半导体抽运铷蒸气输出2.8W线偏振铷激光  

2.8 W Linearly Polarized Output of Rubidium Vapor Laser with Diode Pumping

作　　者：徐程[1,2] 谭荣清[1] 李志永[1,2] 李琳[1,2] 

机构地区：[1]中国科学院电子学研究所高功率气体激光技术部,北京100190 [2]中国科学院大学,北京100049

出　　处：《中国激光》2013年第1期71-75,共5页Chinese Journal of Lasers

摘　　要：半导体抽运碱金属蒸气激光器(DPAL)是一种具有广阔应用前景的激光器,近年来发展迅速。使用碱金属铷所需要的中心波长为780nm的半导体激光器线阵作抽运源,采用平面衍射光栅搭建Littrow外腔将线宽压窄至0.13nm,并使用斩波器将半导体激光变为脉冲输出形式。采用透镜组合对窄线宽半导体激光进行光束扭转整形,整形后光斑近似为方形。半导体激光经线宽压窄和光束整形后,被聚焦进铷蒸气泡,泡内充入79kPa甲烷作为缓冲气体。控制铷蒸气泡温度为145℃,注入谐振腔的抽运光峰值功率为最高13W时,获得了峰值功率2.8W的线偏振铷激光输出,光-光转换效率达21%。Diode pumped alkali vapor laser（DPAL） has applications in many areas and is developed rapidly in recent years.A diode laser array with center wavelength of 780 nm is used as the pump source for the Rb laser,and a Littrow external cavity is built with a plane diffraction grating to narrow the linewidth of the diode laser to 0.13 nm.A chopper is used to change the continuous diode laser to pulsed laser.The diode laser is beam shaped,a lens group is used to twist the beam to nearly square shape.After linewidth narrowing and beam shaping,the diode laser is focused on a Rb vapor cell which is filled with Methane as buffer gas at the pressure of 79 kPa.With the maximum peak power of 13 W injected into the Rb laser resonator and the temperature of the cell kept at about 145 ℃,the linearly polarized Rb laser with peak power of 2.8 W is obtained,and the optical to optical efficiency is 21%.

关 键 词：激光器 半导体抽运碱金属蒸气激光器 铷激光 Littrow外腔 

分 类 号：TN248.2[电子电信—物理电子学]