基于高温LDAs泵浦Zigzag Nd:YAG大能量脉冲激光器OA

To achieve simultaneous lightweight design and high-energy output under special environmental conditions,a compact,water-cooling-free high-energy pulsed laser system based on high-temperature laser diode array(LDAs)side-pumped zigzag Nd:YAG crystals is demonstrated for operation in demanding envir-onments.The zigzag beam propagation increases the effective gain length,while symmetric LDAs pumping of two Nd:YAG crystals improves gain uniformity.Thermal isolation between the crystals and LDAs is im-plemented,with independent temperature control achieved using thermoelectric coolers(TEC)for the Nd:YAG crystals and forced air cooling for the LDAs.A potassium dideuterium phosphate(DKDP)crystal is employed for electro-optic Q-switching.At a repetition rate of 100 Hz without water cooling,a maximum pulse energy of 129.2 mJ with a pulse duration of 9.0 ns is obtained,corresponding to an optical-to-optical efficiency of 9.6%and a slope efficiency of 13.1%,with energy stability better than 2.26%.An output en-ergy of 87.6 mJ is achieved at 150 Hz.This system provides a compact and environmentally robust light source for laser ranging and illumination applications.