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首页> 外文会议>Laser Source Technology for Defense and Security III; Proceedings of SPIE-The International Society for Optical Engineering; vol.6552 >Two-Micron Thulium-Pumped-Holmium Laser Source for DIRCM Applications
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Two-Micron Thulium-Pumped-Holmium Laser Source for DIRCM Applications

机译：用于DIRCM应用的两微米Th泵浦Ho激光源

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摘要

There is an increasing need for the generation of mid-infrared radiation in the 3 to 5-micron region especially in the absorption minima of the atmospheric windows. Recent progress in heat seeking detector technology, operating in these atmospheric windows, make it necessary to develop compact and reliable mid-infrared laser systems that can be installed in airborne platforms. Future DIRCM systems will be equipped with high repetition rate/low energy per pulse lasers as well as low repetition rate/high energy per pulse lasers. We report on the development of a Tm:YLF-fiber laser (1.908 μm) pumped Ho:YAG (2.09 μm) high energy laser system with pulse energies up to 90 mJ at pulse lengths close to 20 ns and operating at 100 Hz. Using single mode fiber lasers as end-pumped sources for the master-oscillator-power-amplifier (MOPA) system almost diffraction limited beam quality resulted. The frequency conversion into the 3 to 5-micron region is performed with a zinc germanium phosphide (ZGP) crystal in a linear or ring resonator. Propagation of the mid-infrared laser beam through moderate turbulent atmosphere will be simulated numerically using phase screens and Fresnel transformation.
机译：越来越需要在3至5微米范围内产生中红外辐射，特别是在大气窗口的吸收最小值方面。在这些大气窗口中运行的热探测器技术的最新进展使得有必要开发可安装在机载平台上的紧凑而可靠的中红外激光系统。未来的DIRCM系统将配备高重复频率/低能量/脉冲激光器，以及低重复频率/高能量/脉冲激光器。我们报告了Tm：YLF光纤激光器（1.908μm）泵浦的Ho：YAG（2.09μm）高能激光器系统的发展情况，该系统在脉冲长度接近20 ns时工作于100 Hz，脉冲能量高达90 mJ。使用单模光纤激光器作为主振荡器-功率放大器（MOPA）系统的端泵浦光源，几乎可以得到衍射限制的光束质量。使用线性或环形谐振器中的磷化锌锗（ZGP）晶体将频率转换为3至5微米区域。中红外激光束在中等湍流大气中的传播将使用相位屏蔽和菲涅耳变换进行数值模拟。

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