长脉冲医用Nd:YAG激光器斩波技术的研究

运用绝缘栅双极型晶体管(IGBT)对泵浦氙灯进行斩波放电，并采用间歇式长脉冲斩波技术。设计了一套能发射和控制长脉冲激光的Nd：YAG激光器。与传统连续式长脉冲斩波技术相比。该技术使IGBT在更大的安全工作区(SoA)内稳定工作；泵浦功率高，提高了激光器的电光转换效率；在不影响疗效的情况下，使输出激光对皮肤的热作用变缓，从而能有效防止正常皮肤的热灼伤。运用该技术得到了波长为1064nm、最大能量可达50J和脉冲持续时间在9～99ms内可调的激光脉冲。

Research on the Chopper Technology of a Long-pulsed Medical Nd:YAG Laser

By controlling the light wave-form of Xe lamp with insulated gate bipolar transistor(IGBT) and using the periodic long-pulse chopper technology,a long pulsed medical Nd:YAG laser was designed.it can enlarge the safe operating area(SOA) of the IGBT module,which can make the IGBT work more stably;it has higher electronic-optic efficiency because of its higher pumping power;it can reduce the skin thermal effect and prevent the skin from heat injury during the hair removel treatment.So a long phase laser with wavelength of 1 064 nm,energe of 50 J,pulse duration from 9 ms to 99 ms,was obtained.