激光火工品单光纤光路检测技术

Light Path Checking Technology of Laser Ignited Initiators with Single Optical Fiber

针对目前激光火工品的光路检测问题,在激光火工品与药剂接触的光纤端面蒸镀能透过点火激光而反射检测激光的短波通滤光膜片,利用光路环行器,建立了一种单光纤激光火工品光路检测系统.研究表明,在基本不改变原激光火工品结构的情况下,该单光纤光路检测系统能够实现激光火工品光路连续性检测,光路完整时的检测激光反射电流可以达到200 ～300 μA,高于光路折断时的30 μA;检测激光反射电流与点火激光能量传输效率基本成二次函数递增关系,能够反映点火激光能量传输效率的相对大小.

A checking system with single optical fiber was established, which was mainly constituted of a light circulator and a optical film reflecting checking laser and transfering ignition laser between initiators and optical linker. Results show that the system can check the light path continuity of laser ignited initiators without changing the structure of laser ignited initiator. The reflected chec- king laser current is up to 200-300 μA when light path is perfectly continuous, which is only 30 μA when the light path is not con- tinuous, and the laser energy transfer efficiency is approximatively quadratic function with the reflected checking laser current.