焦耳量级光抽运XeF蓝绿激光器

阐述了焦耳量级XeF(C-A)激光器的总体设计及抽运源辐射能力的测试方法,分析了XeF(C-A)激光特性参量与XeF2初始浓度、输出透过率以及气体成分之间的关系。抽运源采用紧凑型结构,有效地减小了放电回路面积,使回路电感降低到330nH,从而使放电沉积效率达到74%,抽运源平均沉积功率密度达到12MW/cm。利用分幅相机拍摄了XeF2光解离波并对抽运源辐射能力进行了诊断,抽运源辐射在140~170nm波段的光子出射通量达到5×1023s-1.cm-2,辐射亮度温度高于25kK。激光器有效激活长度80cm,采用平凹谐振腔,激光器获得了稳定的焦耳级能量输出,最大输出能量2.5J,总转换效率0.1%,激光脉宽约为700ns。

Joule Level XeF Laser Operating in the Blue-Green Region

The design of XeF(C-A) laser and measuremant of the pumping source radiation ability are given. The results of experimental study on XeF(C-A) laser properties under different conditions of initial XeF_2 concentration, output transmissivity and gas components are reported and analyzed in detail. The area of discharge circuit is reduced efficiently by using the compact pumping source, and the equivalent inductance of discharge circuit is decreased to about 330 nH, so that the deposited efficiency is up to 74% and the average deposited power density of the pumping source is about 12 MW/cm. Radiative intensity of pumping source is diagnosed by calculating XeF_2 photodissociation wave evolvement which is photographed by framing camera. The photon flux in the wavelength of 140170 nm is about 510~(23) s~(-1)cm~(-2) of which the radiative brightness temperature is more than 25 kK. The effective gain length of laser is 80 cm and a plane-spherical stable resonator is used. A laser energy output in joule level is stably obtained. The maximum output energy is 2.5 J with the total conversion efficiency of 0.1%, and the laser pulse width is about (700 ns.)