KIEE International Transactions on Electrophysics and Applications

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Long Pulse Generation Technology of an Alexandrite Laser System for Hair Removal

  • Published : 2003.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, an Alexandrite laser system for hair removal adopting a multi-discharge method in which three flash lamps are turned on consecutively was designed and fabricated to examine the pulse width and the pulse shape of the laser beams depending upon the changes in the lamp turn-on time. Specifically, this study demonstrates a technology that makes it possible to formulate various pulse shapes by turning on three flashlamps consecutively on a real-time basis with the aid of a PIC (program integrated circuit) one-chip microprocessor. With this technique, the lamp turn-on delay time can be varied more diversely from 0 to 10 ms and real-time control is possible with an external keyboard, enabling an assortment of pulse shapes. In addition, longer pulses can be more widely used for industrial processing as well as for numerous medical purposes.

Keywords

References

  1. Orazio Svelto, Principles of Lasers (New York: Plenum), Chap. 9, 1982
  2. A. L. Petrov et al., New Advances in Industry Application of YAG Pulse Lasers, Proceeding of Lamp '92, Nagaoka, pp. 993-997, 1992
  3. H.N. Bransch, Sep., Photonics Spectra, pp. 107, 1991
  4. Yasutomo Fujimori, Laser Material Processing in Electric Industries, Proceeding of Lamp '92, Nagaoka, pp. 981-986, 1992
  5. Kenichi Iga et al., Fundamentals of Laser Optics (New York and London: Plenum), pp. 318-337, 1994
  6. Wheeland RG., Laser-assisted hair removal. Dermatol Clin, 15, pp. 469-477, 1997
  7. Finkel B et al., Pulsed alexandrite laser technology for noninvasive hair removal. J Clin Laser Med Surg, 15, pp.225-9, 1997
  8. Nanni C et al., Long-pulsed alexandrite laser-assisted hair removal at 5, 10, and 20 millisecond pulse durations. Laser Surg Med, 24, pp. 332-7, 1999
  9. Kayukov S. V. et al., The influence of Laser Radiation Pulse shape on the Spot weld Parameters, Proc. Int. Conf. New Advance in Welding and Allied Processes, May, Beijing, China, pp. 187-191, 1990
  10. W. Koechner, Solid-State Laser Engineering (New York, Heidelberg: Springer-Verlag), pp. 318-340, 1995
  11. Albright. C., Laser Welding, Machining and Materials Processing (IFS Publication), pp. 8-12, 1996
  12. Hee-Je Kim, Eun-Soo Kim, Dong-Hoon Lee, The development of a high repetitive and high power Nd:YAG laser by using a zero-current switching resonant converter. Optics & Laser Technology, 30, pp. 199-203, 1998
  13. Hee-Je Kim, et al., Active two-pulse superposition technique of a pulsed Nd:YAG laser. Optical Engineering, Vol. 37, Issue 6, pp. 1780-1784, 1998