百赫兹百毫焦全固态纳秒激光器技术研究

Hundred hertz and hundred millijoules all-solid-state nanosecond laser technology

  • 摘要: 针对多目标和伪随机编码激光半主动末制导,以及快速目标测距等应用环境的需求,设计了百赫兹百毫焦全固态纳秒激光器,旨在实现一体化、小型化和实用化样机要求。基于模块分时泵浦方式,有效降低单位体积激光工作物质及其泵浦源的散热压力,同时采用非稳激光谐振腔技术,提升出射激光光束质量,最后将2路谐振激光通过偏振控制合为1束,实现了1束高光束质量的百赫兹百毫焦纳秒脉冲激光输出,一体化样机质量仅15.5 kg。在工作频率100 Hz时,输出激光平均能量112 mJ,能量稳定性优于±9%,脉冲宽度10.8 ns,光束质量达到了11 mm·mrad,满足多目标和伪随机编码激光半主动末制导,以及快速目标测距对激光光源的需求。

     

    Abstract: According to the requirements of multi-target and pseudo-random coded laser semi-active terminal guidance, as well as the fast target ranging and other application environments, a hundred hertz and hundred millijoules all-solid-state nanosecond laser was designed to meet the requirements of integrated, miniaturized and practical prototype. Based on the modular time-sharing pump mode, the heat dissipation pressure of the unit volume laser working material and its pump source was effectively reduced. At the same time, the unstable laser resonator technology was adopted to improve the quality of the outgoing laser beam. Finally, the two resonant lasers were combined into one beam through polarization control to realize the output of a high beam quality hundred hertz and hundred millijoules nanosecond pulse laser. The weight of the integrated prototype is only 15.5 kg. At the operating frequency of 100 Hz, the average output laser energy is 112 mJ, the energy stability is better than 8%, the pulse width is 10.8 ns, and the beam quality reaches 11 mm·mrad. This results can basically meet the requirements of multi-target and pseudo-random coded laser semi-active terminal guidance and fast target ranging for laser source excitation.

     

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