摘要
为提高激光点火的可靠性,检测光路中存在光纤的弯曲、端面污染、划痕或烧蚀等失效因素造成的损耗,经过双向色膜和双光纤探测器的结构设计,建立了一套双光纤、双光源的自检系统,使检测光的接收率达到6%以上.实验结果表明,获得的光纤损耗在650nm检测光和808nm发火光下损耗半经验公式,从检测光路损耗能推导出发火光路损耗,解决了激光点火技术在工程实际应用中自检测难题.
To ensure the reliability of laser firing, detection of all kinds of losses is necessary, such as the bend loss, dirty loss, nick loss, and ablation loss. A built-in-test （BIT） system with dual fiber optics and two lasers was founded by designing a dichroic coating and a dual-optical- fiber detector. The detected beam receiving rate of BIT system could reach above 6~. Further, the 808 nm firing optical path loss could be deduced from the 650 nm BIT path loss by transform of empirical formulae gotten by experimental study. Research results above could provide a built- in test method to laser ignition in engineering practice.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2012年第8期833-837,共5页
Transactions of Beijing Institute of Technology
