定时中断对飞秒激光脉冲调制的研究

Research on Modulation of Regular Interruption to Femtosecond Laser Pulse

提出了一种数字信号对腔倒空式激光脉冲的调制方法 具有腔倒空装置的激光脉冲在腔内放大 ,当增益开始衰减时 ,由电光晶体改变激光的偏振方向将激光脉冲从谐振腔中倒出 ;再由1kHz的脉冲信号向计算机发出定时中断请求 ,中断过程中用数字信号调制脉冲倒出的触发电平 ,从而调制激光脉冲 用该方法实现了对钛宝石飞秒激光再生放大器的调制 。

A method,modulation of digital signal to cavity-dumped laser pulse, is proposed. The laser pulse with cavity-dumped device is amplified in the cavity and will be pumped from resonant cavity by a electrooptic crystal which redirects the polarizing direction of the laser while the gain begins to reduce. Then a pulse signal with 1 kHz frequency gives out interrupt request to computer in regulate time . During the interruption the digital signal modulates the trigger lever pumped by pulse and thus modulates the laser pulse. This method makes the Ti∶sapphire femtosecond regenerative amplifier being modulated and successfully writes binary data in the melting quartz glass.