小型化高能量对称抽运热传导激光器

Miniature high-energy symmetrically-pumped conductive cooling laser

为了解决热传导散热激光器抽运和散热不均匀导致光束质量下降的问题,采用一种对称抽运和对称散热的激光抽运构型,结合激光棒端面直接镀膜技术,设计了一种小型化热传导激光器,并进行了试验验证。结果表明,激光器在5Hz重复频率下输出大于100mJ的能量,脉冲宽度为9.18ns,能量稳定度优于8%;且通过了高低温、振动试验,性能稳定。这种对称抽运热传导激光器具有结构简单、输出能量高和光束质量好的优点,特别适合用于小型化机载激光测距领域。

In order to solve the problem of beam quality decline induced by asymmetrical pumping and cooling of traditional conductive cooling lasers,one laser pumping structure with symmetrical pumping and cooling was adopted.Combined with direct coating film on laser rod end face,one miniature conductive cooling laser was designed and tested experimentally.The results show that,the output laser energy is more than100mJ,with the laser pulse repetition of5Hz.The laser pulse width is9.18ns,and the energy instability is better than8%.The laser works steadily under high and low temperature or vibration circumstance.The symmetrically-pumped conductive cooling laser has advantages of simple structure,high energy and good beam quality.It is very suitable for miniature airborne laser rangefinders.