Optical igniter with graded index glass rod

摘要

An optical igniter includes a pyrotechnic substance and an optical fiber, one end of which is connected to a source of laser radiation and the other end of which is inserted in a connector. A removable mechanical connection is provided between the optical fiber connector and the pyrotechnic substance. A glass rod between the optical fiber connector and the pyrotechnic substance has its axis aligned with the axis of the optical fiber and is made of graded index glass in one part or two coaxial parts. It is in contact with the pyrotechnic substance and with the end of the optical fiber. Laser radiation from the end of the optical fiber passes through the glass rod and is focused onto the face of the glass rod in contact with the pyrotechnic substance.