论文部分内容阅读
研究全息干板的时间响应特性需要系列宽度的光脉冲,而微秒光脉冲需要通过外置开关来实现。目前广泛使用的电光开关、声光开关存在消光比低或光能利用率不够等缺点,为得到宽度合适、消光比高、光能利用率高的微秒光脉冲,设计了由快开快门和爆炸快门相结合的开关系统。该系统不受光偏振态和波长限制,抗干扰能力强,结构简单,适用范围广,脉冲前后沿均小于15μs;输出宽度可通过延时在一定范围内调节,消光比达50000倍,透射率大于90%。讨论了系统的工作原理及实现方法,测量了该开关输出光脉冲的典型波形,并对开启时间的漂移进行了讨论;此开关已在全息干板互易律失效规律的实验研究中得到了较好的结果,为快开快门和爆炸快门的使用提供了一个新的应用领域。
The time response of a holographic plate requires a series of pulses of light, and a microsecond pulse of light needs to be made through an external switch. Currently widely used electro-optical switches, acousto-optic switches exist low extinction ratio or insufficient utilization of light energy and other shortcomings, in order to get the appropriate width, high extinction ratio, high energy microsecond light pulse, designed by the fast open shutter and Explosion shutter combination switch system. The system is not limited by the polarization state of light and wavelength, strong anti-interference ability, simple structure, wide application range, less than 15μs pulse front and back; output width can be adjusted within a certain range by the delay, extinction ratio up to 50000 times, 90%. The working principle and realization method of the system are discussed. The typical waveform of the output light pulse of the switch is measured and the on-time drift is discussed. The switch has been tested in the experimental study of reciprocal law failure of holographic plate The good results provide a new field of application for the use of quick-opening shutters and explosion shutters.