基于多波长阵列的无温控侧泵Nd∶YAG固体激光器

Non-temperature controlled side pumpe Nd∶YAG solid state laser based on multi-wavelength array

随着半导体阵列泵浦的Nd∶YAG固体激光器迅速发展,应用范围逐渐拓宽,其体积、能量、环境适应性逐渐成为衡量激光器性能的重要指标。为了满足激光照射领域使用需求,研制了一种在宽温(-40~60℃)范围内正常工作的小型化、大能量、无温控的侧泵Nd∶YAG电光调Q激光器。该激光器采用多个多波长(3-λ)半导体阵列为泵浦源,Φ5mm×64mm的Nd∶YAG晶体为工作物质,LN晶体为电光调Q晶体[1]。在宽温范围(-40~60℃)内,该激光器可正常工作,单脉冲输出能量20Hz时可保持在55mJ以上、1Hz时可保持在60mJ以上。整机尺寸为140mm×60mm×39.5mm,满足激光器小型化、轻量化发展要求。

With the rapid development of semiconductor array pumped Nd∶YAG solid laser, the application range is gradually widened.Its volume、energy and environmental adaptability have gradually become import indicators to measure the performance of laser.In order to meet the requirements of laser irradiation field, a miniaturized, high-energy, non-temperatuer controlled side-pump Nd∶YAG electro-optic Q-switched laser was developed in a wide temperature range-40~60℃.Multiple multi-wavelength(3-λ) arrays are used as pump sources, 5 mm×64 mmNd∶YAG crystal round rod is used as working material, and LN crystal is used as electro-optic Q-switch.In the wide temperature range, the laser works normally, and the laser energy can be kept above 55 mJ at 20 Hz and 60 mJ at 1 Hz when the single pulse output.The size of the whole machine is 140 mm×60 mm×39.5 mm, which can meet the development requirements of laser miniaturization, light weight and strong environmental adaptability.