新型高重复频率脉冲CO_2激光器  

Novel high repetition-rate pulse CO_2 laser

作　　者：郑义军[1] 谭荣清[1] 王东雷[1] 张阔海[1] 黄文武[1] 刘世明[1] 李能文[1] 孙科[1] 卢远添[1] 刁伟伦[1] 

机构地区：[1]中国科学院电子学研究所,北京100190

出　　处：《红外与激光工程》2013年第10期2697-2701,共5页Infrared and Laser Engineering

摘　　要：报道了一种新型高重复频率的脉冲CO2激光器。该型激光器结构紧凑,激光器外型尺寸为300 mm×300 mm×300 mm,工作气体放电增益体积为12×103mm3,谐振腔的长度为310 mm。为了获得大体积均匀稳定的气体放电,激光器采用了紫外电晕预电离方式。在激光器自由运转时,单脉冲激光的输出能量达到15 mJ,输出脉冲的半高全宽为70 ns。激光器采用紧凑型高速涡轮增压风机,在一个大气压的条件下,气流循环速度超过100 m/s,激光脉冲重复频率为1.5 kHz,采用大体积强迫冷却和气体主动置换技术,可以获得较长时间激光稳定输出。在已有的实验基础上,采用光栅调谐,可快速准确地实现高重复频率脉冲CO2激光器的谱线选支输出。A novel transversely excited atmospheric （TEA） CO2 laser with high repetition- rate was reported. The size of laser is 300 mmí300 mmí300 mm. The discharge volume is 12í103 mm3, the length of cavity is 310 mm. The ultraviolet preionization makes the discharge even and stable, the output energy can be as high as 15 mJ under the circumstance of free oscillation, and the full width at half maximum of the light pulse is 70 ns. To acquire the high wind velocity, a turbocharger was used in the system of the fast- gas flow cycle. When the pressure in the cavity is 100 kPa, the wind speed is 100 m/s, and the repetition rate of the TEA CO2 laser is up to 1.5 kHz. On the basis of preliminary experiment, the system of the grating tuning line selection can be applied to the high repetition- rate pulse laser to abtain the output of grating line selection accurately and fast.

关 键 词：脉冲CO2激光器 高重复频率 紫外预电离 

分 类 号：TN248.2[电子电信—物理电子学]