化学强化玻璃被广泛应用于电子产品屏幕,但很难被切割加工。利用皮秒激光高峰值功率、超短脉冲及贝塞尔光束长焦深的特点,在化学强化玻璃内加工出一个狭长的改性截面,利用强化玻璃本身的应力与皮秒激光诱导的应力,使强化玻璃精准地沿着改性截面自动断开,并获得了切割速度高达400 mm/s,切割面粗糙度为395 nm的切割分离效果。实验结果表明,影响切割速度和质量的主要参数是单脉冲能量和脉冲改性间距。

Chemically strengthened glass is widely used in electronic device display screens; however, they are difficult to cut. With the high peak power of a picosecond laser and long focal depth of a Bessel beam, a narrow-modified plane is machined inside the chemical glass. Owing to its original stress and stress induced by the picosecond laser, chemically strengthened glass accurately self-breaks along the modified plane with cutting speed of 400 mm/s and surface roughness of 395 nm. Experimental results show that pulse energy and pulse modification spacing are the main parameters affecting cutting speed and quality.