Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1994.07b
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- Pages.1210-1212
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- 1994
Metal Drilling using Amplitude Modulated Laser Pulse
AM 변조된 레이저 펄스를 이용한 금속 Drilling
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Kim, Ho-Seong
(Department of Electrical Engineering, Chung-Ang University)
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김호성
(중앙대학교 전기공학과)
- Published : 1994.07.21
Abstract
An amplitude modulation technique for increasing the laser penetration efficiency for metals has been studied. By chopping electro-optically Nd:YAG laser pulse, the threshold energy for reliable hole drilling was decreased significantly and the penetration depth was increased. It was observed that the effect of chopping was optimal at 8-12 kHz with 60% duty cycle. It is believed that this improvement is due to an increase in the vapor recoil pressure and reduced plasma screening.
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