By incorporating a commercial diode-laser-bar into a volume Bragg grating(VBG) based external cavity, we obtained 80 W CW output power with 0. 1 nm linewidth centered at 780. 2 ntn. To reduce the thermal effect, a chopper was used to convert the CW pump light into pulsed mode, with pulse duration of 440 ps and duty ratio of 1 : 5. The 5 mm long gain medium was filled with metallic Rb and buffer gases of 33 kPa ethane and 47 kPa helium at room temperature. At peak pump power of 35. 4 W and gain medium temperature of 120 'C , we obtained 600 mW peak power output of the 795 nm Rb laser with slope efficiency of 1.7%.%采用体光栅对商用线阵半导体激光器进行线宽压缩,得到线宽0.1 nm、中心波长780.2 nm、最高连续输出功率80 W的泵浦激光输出.为了降低热效应,通过外加斩波器将泵浦光转化为脉冲模式,脉宽440 μs,占空比为1∶5.采用长度为5 mm的铷金属饱和蒸气作为增益介质,并在常温下充入33 kPa乙烷和47 kPa氦气,进行了出光实验.在泵浦峰值功率35.4 W,铷吸收池温度120℃时,得到峰值功率600mW的795 nm铷激光输出,斜率效率为1.7％.
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