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372-mJ long pulse pyrotechnically pumped laser 总被引:2,自引:0,他引:2
A pyrotechnically pumped Nd glass laser is demonstrated by the use of pyrotechnic flashlamps composed of several chemical materials arranged in a stable plane concave resonator cavity. The flashlamp was made of chemical mixture with oxidant, fuel, and binder. The emission spectrum of pyrotechnic flame covered most of the absorption bands of Nda+ in phosphate glass. Under 4.56-g chemical mixture pumping, long pulse output power of about 5.5 W was achieved. 相似文献
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加工了射流式水冷铜镜模型,采用红外热像仪测量了冷却过程中镜面温度分布云图,证明了射流式水冷镜冷却的均匀性。采用热电偶较精确地测量了铜镜冷却过程中镜面温度的变化,实验结果与数值模拟吻合较好,验证了射流式水冷镜数值模型的可靠性。结合高能化学激光器中水冷镜实际情况,对直线沟槽型水冷镜和射流式水冷镜的形变特性进行了分析。计算结果表明,高能化学激光器水冷镜必须承压加工才能使用,射流式水冷镜可以很好地应用于高能化学激光器。此外,进一步分析了冷却孔直径和数量这两个参数对大口径射流式水冷镜形变的影响,结果表明:在孔数一定的情况下,采用更大口径的冷却孔,镜面冷却速度快、镜面最大温度低,可以获得更小的镜面形变;采用更多的冷却孔可以获得更好的冷却效果。 相似文献
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We propose a continuous-wave(CW)middle infrared(MIR)and long infrared(LIR)dual-band laser for the calibration and effect research of infrared detecting and imaging systems.A total output power of 18 W is achieved by the proposed dual-band laser through one DF gain medium module and one parallel placed CO2 gain medium module using a common stable resonator and output mirror with nominal transmissivities of ~5%in the MIR band and~10%in the LIR band.Spectra of dual-band laser are acquired.The power extracting efficiency of this dual-band laser can be significantly improved,as validated by a single-band test of optimized parameters. 相似文献
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对一台小型电激励连续波DF化学激光器进行了实验研究,在光轴位于喷管阵列出口平面下游10mm处和15mm处分别进行了出光实验,得到188.4W和205.8W的DF激光输出,输出激光波长为3.6~4.1μm,激光器的电效率分别为2.3%和2.5%。该小型电激励连续波DF化学激光器长时间(100s)运行的功率稳定性峰谷值和均方根值分别为±1.04%和0.49%,工作状态较为稳定,实验可重复性好,操作方便,是强光条件下镜片膜层吸收系数测量的适用红外激光光源。 相似文献
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