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公开(公告)号:US06263004B1
公开(公告)日:2001-07-17
申请号:US09230862
申请日:1999-02-02
CPC分类号: H01S3/0627 , H01S3/0602 , H01S3/09415 , H01S3/113 , H01S3/115 , H01S3/127
摘要: A Q-switched laser, which is pumped by at least one pump source (8), providing pulses. The laser comprises two mirrors (3,5) providing a laser cavity, in which a gain medium (2), a saturable absorber (4) and a controllable active modulator (6) is situated. Loss can be introduced in the modulator (6) by a control device (10). In a first phase, said control device (10) introduces loss in the active modulator, setting a threshold inversion density band to a level (B) high enough to be above the actual inversion density in the gain medium means. In a second phase, the control device lowers said loss instantly, which will lower the threshold inversion density band to a level (A) lower than the actual inversion density in order to activate emission of said Q-switched pulse.
摘要翻译: 由至少一个泵浦源(8)泵送的Q开关激光器,提供脉冲。 激光器包括提供激光腔的两个反射镜(3,5),其中设置增益介质(2),可饱和吸收器(4)和可控有源调制器(6)。 可以通过控制装置(10)在调制器(6)中引入损耗。 在第一阶段中,所述控制装置(10)在有源调制器中引入损耗,将阈值反转密度带设置为高于足够高于增益介质装置中的实际反转密度的电平(B)。 在第二阶段,控制装置立即降低所述损失,这将将阈值反转密度带降低到低于实际反转密度的电平(A),以激活所述Q开关脉冲的发射。