为得到不添加额外吸收剂的透明聚碳酸酯（PC）焊接试样，使用波长1710 nm和1910 nm的激光对PC进行了透射焊接研究，通过观察焊缝外观和测试焊缝强度以确定焊接试样的质量。试验结果表明：1710 nm和1910 nm的激光可以得到强度接近、焊接效果较好的PC试样；使用1710 nm的激光，在功率为20 W、焊接速度为6.5 mm/s、离焦量为-6 mm时，得到了最大拉断力为1334.4 N、焊接外观效果较好的PC试样，试样的强度达到了PC本体的60.9%。

To obtain transparent polycarbonate (PC) welding samples without adding additional absorbents, 1710 nm and 1910 nm lasers were used to study the transmission welding of PC. The qualities of obtained welding samples were verified by the corresponding weld appearance and the strength of each sample. The experimental results show that the PC welding samples obtained by 1710 nm laser and 1910 nm laser have close strength and desired welding effect. The maximum tensile force of 1334.4 N was obtained by the 1710 nm laser with parameters as follows: 20 W power, 6.5 mm/s welding speed, and -6 mm defocusing amount, and the strength of the welding sample reached 60.9% of the PC substrate.