长脉冲医用Nd:YAG激光器斩波技术的研究  

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

作　　者：叶志生[1] 徐锡强[1] 撒昱[1] 王升平[1] 高慧敏[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院

出　　处：《光电子．激光》2005年第3期380-384,共5页Journal of Optoelectronics·Laser

摘　　要：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1 064 nm、最大能量可达50 J和脉冲持续时间在9～99 ms内可调的激光脉冲.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, and 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 removal treatment. So a long phase laser with wavelength of 1064 nm, energy of 50 J, pulse duration from 9 ms to 99 ms, was obtained.

关 键 词：绝缘栅双极型晶体管 间歇式长脉冲 斩波技术 安全工作区 热灼伤 医用Nd 皮肤 

分 类 号：TN248.1[电子电信—物理电子学] R75[医药卫生—皮肤病学与性病学]