定时中断对飞秒激光脉冲调制的研究

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1 kHz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,成功地在熔融石英玻璃内写入了二进制数据.

Research on Modulation of Regular Interruption to Femtosecond Laser Pulse

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.