Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Metal Drilling using Amplitude Modulated Laser Pulse

AM 변조된 레이저 펄스를 이용한 금속 Drilling

  • Kim, Ho-Seong (Department of Electrical Engineering, Chung-Ang University)
  • Published : 1994.07.21
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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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