Pulsed-laser with first-pulse control

专利名称：Pulsed-laser with first-pulse control发明人：Rudiger von Elm,Axel Kneip申请号：US09/145686申请日：19980902公开号：US06038241A公开日：20000314

摘要：A pulsed-laser includes a pump-light source, a gain-medium and a Q- switch. TheQ-switch has an on-mode in which it is substantially transparent, and an off-mode in whichit is normally substantially opaque. A gate-signal switches the laser between a ready-mode in which no pulses are delivered and a pulse-drive mode in which pulses aredelivered. A first-pulse controller is provided for controlling the energy in the first of aseries of pulses to be delivered by the laser. The first-pulse controller controls the firstpulse energy by operating one or more of the Q-switch and the pump-light source insuch a way that after switching from the ready-mode to the pulse drive mode the energyin the gain-medium at the instant of triggering the first pulse in the series of pulses isabout the same that which will be reached in the gain-medium prior to triggering ofsubsequent pulses in the series. In this way, all pulses in the series have the about thesame energy. Operation of the Q-switch may include raising its transmission value duringits off-mode to allow a relatively low level of laser action for depleting energy stored inthe gain-medium.

申请人：COHERENT, INC.

代理机构：Limbach & Limbach LP.

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