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    • 8. 发明授权
    • Rapid pulsed Er:YAG laser
    • 快速脉冲Er:YAG激光
    • US06193711B1
    • 2001-02-27
    • US08991217
    • 1997-12-12
    • Kevin ConnorsGreg SpoonerRalph Saunders
    • Kevin ConnorsGreg SpoonerRalph Saunders
    • A61N506
    • H01S3/092A61B18/203A61B2017/00172A61B2018/00452A61B2018/0047H01S3/08072H01S3/1022Y10S372/705
    • An Er:YAG laser system has a resonant cavity including an Er:YAG rod pulse-pumped by a pulsed flashlamp. The pump-pulse repetition rate and average power is selected to provide a known essentially constant thermal-lensing power in the Er:YAG rod. Design parameters of the Er:YAG rod and the resonant cavity are selected to compensate for this thermal-lensing power. A shutter in the resonant cavity, when closed or open, respectively prevents or allows a laser output-pulse to be generated in response to a pump-pulse. Laser output-pulse duration is continuously variable and is controlled by controlling the duration of flashlamp-pulses. A sequence of laser output-pulses is controlled by opening and closing the shutter. This arrangement has the advantage that the laser output-pulse repetition rate can be selected to be the flashlamp-pulse repetition rate or some sub-multiple thereof while maintaining thermal-lensing power in the rod essentially constant and compensated for.
    • Er:YAG激光系统具有包括由脉冲闪光灯脉冲泵浦的Er:YAG棒的谐振腔。 选择泵浦脉冲重复率和平均功率以在Er:YAG棒中提供已知的基本恒定的热透镜功率。 选择Er:YAG棒和谐振腔的设计参数来补偿这种热透镜功率。 谐振腔中的快门在闭合或打开时分别防止或允许响应于泵浦脉冲而产生激光输出脉冲。 激光输出脉冲持续时间是连续可变的,并且通过控制闪光灯脉冲的持续时间来控制。 通过打开和关闭快门来控制一系列激光输出脉冲。 这种布置的优点在于,可以将激光输出脉冲重复率选择为闪光灯脉冲重复率或其一些子倍数,同时保持棒中的热透镜功率基本上恒定并被补偿。