小型多功能CO_2激光器

Compact multifunctional CO_2 laser

研制了一种小型多功能CO2激光器。该激光器可以单脉冲、重复频率或连续方式输出,并可实现输出脉冲频率的编码及波长调谐。激光器谐振腔采用光栅一级振荡,零级输出的工作方式,分别利用声光调Q技术和脉冲放电技术实现了百纳秒至亚毫秒量级的脉冲激光输出。介绍了该激光器中基于光学角反射器原理设计的光栅调谐定向输出装置,并对其进行了理论计算和论证,实现了不同波长激光的定向、定位输出,获得调谐激光输出谱线超过60条,谱线分辨率优于0.01μm。激光器脉冲重复频率1Hz～10kHz连续可调,输出波长9.2～10.8μm,激光器连续输出最大功率8W,重复频率1kHz时最小激光脉宽180ns,峰值功率4062W。该激光器在激光与物质相互作用研究领域,特别是在激光对物质作用与破坏机理的研究方面具有重要的应用价值。

A compact multifunctional CO2 laser is constructed. This laser can work at behaviors of single pulse, repetition frequency or continuous operation and also can realize pulse frequency coding and wavelength tuning. The resonator in the laser adopts an operation mode of zero-level output and first-order oscillation to achieve pulsed laser output time from a hundreds nanosecond level to a sub-millisecond level by using the technologies of acousto-optical Q-switch and pulse discharge. A grating tuned directional output device consisting of a rotating platform, a infrared grating and a plane mirror is introduced based on an optical angle reflector to realize the directional and positional outputs of different wavelengths, which has obtained 60 laser spectral lines with a resolution of 0.01 μm. From experiments it shows the laser can provide the pulse repetition rate continuously from 1 Hz to 10 kHz and the tuning ranges of output wavelength from 9.2 μm to 10. 8 μm, also a maximal continuous output power of 8 W, a minimal pulse width of 180 ns and a maximal peak power of d 062 W. The laser has great applied values in the scientific fields of laser interacting with materials, especially in the mechanism investigation on the damage effect of lasers on materials.