用于3D打印的高功率蓝紫光半导体激光器及光场匀化技术的研究

High power blue violet laser diode and optical field homogenization technology for 3D printing

摘要:

摘要：本文研究了用于高精度3D打印的高功率蓝紫光半导体激光器，及激光整形匀化光学系统的设计。采用非球面透镜将28个输出功率为350 mW的蓝紫光半导体激光器，分别耦合进纤芯直径400 μm、数值孔径0.22的光纤，光纤经捆绑合束进行功率扩展，输出功率达8.1 W。输出功率6.9W时对激光稳定性进行测试，2个小时内RMS功率不稳定性为±0.3%。利用Zemax软件设计了一组复眼透镜对激光光场进行整形匀化，模拟结果为均匀度从48%提高到86%，实验测量光场均匀度达到84.4%，获得了用于3D打印以及激光医疗等领域的高功率、高光场均匀度的蓝紫光半导体激光光源。

Abstract:

Abstract: In this paper, a high-power blue violet laser diode was studied and a homogenization system was designed for high precision 3D printing. Every blue violet diode laser with output power of 350 mW was coupled into the fiber with a core diameter of 400 μm and numerical aperture of 0.22 using an aspherical lens. 28 fibers were mechanically bundled for power expansion. The laser output power of 8.1 W was achieved. When the output power was 6.9 W, the stability of the laser was measured. The RMS power instability was ±0.3% within 2 h. A set of fly eye lenses were designed to homogenize the laser field using Zemax software. The simulation result was that the uniformity of laser field was increased from 48% to 86%. After laser homogenization experiment, the uniformity of the laser field reached 84.4%. Blue violet laser source with high power and high field uniformity was successfully obtained for 3D printing and laser medical treatment.