Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

The high repetition operating characteristics of pulsed Nd:YAG laser by parallel mesh and alternating charge-discharge system

병렬 메쉬 및 교번 충.방전 방식에 의한 펄스형 Nd:YAG 레이저의 고반복 동작특성에 관한 연구

  • Park, K.R. (Dept. of Electrical Eng, Pusan National Univ.) ;
  • Kim, B.G. (Dept. of Electrical Eng, Pusan National Univ.) ;
  • Hong, J.H. (Dept. of Electrical Eng, Pusan National Univ.) ;
  • Kim, W.Y. (Dept. of Electrical Eng, Pusan National Univ.) ;
  • Kim, H.J. (Dept. of Electrical Eng, Pusan National Univ.) ;
  • Cho, J.S. (Dept. of Electrical Eng, Pusan National Univ.)
  • Published : 1999.11.20
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Abstract

Pulsed Nd:YAG laser is used widely for materials processing and instrumentation. It is very important to control the laser energy density in materials processing by a pulsed Nd:YAG laser. A pulse repetition rate and a pulse width are regarded as the most dominant factors to control the energy density of laser beam. In this study, the alternating charge-discharge system was designed to adjust a pulse repetition rate. And the parallel mesh is added to increase laser output power. This system is controlled by one chip microprocessor and allows to replace an expensive condenser for high frequency to a cheap condenser for low frequency. In addition, we have investigated the current pulse shape of flashlamp and the operating characteristics of a pulsed Nd:YAG laser. As a result, it is found that the laser output of the power supply using the parallel mesh and the alternating charge-discharge system is not less than that of typical power supply. As the pulse repetition rate rises from 10pps to 110pps by the step of 20pps at 1000V and 1200V, it is found that the laser efficiency decreases but the laser output power increases about 5W at each step.

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