光子学报, 2017, 46 (3): 0314003, 网络出版: 2017-04-10
基于光反馈半导体激光器的多开关状态检测系统
Multi-switch States Detection System Based on Semiconductor Laser with Optical Feedbacks
非线性光学 检测 半导体激光器 光反馈 开关网络 混沌 自相关 Nonlinear optics Detection Semiconductor lasers Optical feedback Switching networks Chaos Autocorrelation
摘要
为了能够同时检测多个开关的状态, 提出了一种基于光反馈半导体激光器的多开关状态检测系统.该系统由半导体激光器、多开关传感网络和数据采集与处理单元组成.多开关传感网络包括多个反馈光路, 每个光路由耦合器、光纤和强度反射式光开关构成.所有开关都闭合时, 系统没有反馈, 激光器输出连续光.当有开关被打开时, 光反馈使系统工作在混沌状态.根据系统输出信号的自相关曲线中与各开关位置对应处的峰值是否大于预设阈值来判断开关的状态, 通过编程令其它位置处的峰值为零来消除干扰峰.搭建了3个开关的实验系统, 分别对不同开关状态下的系统进行检测, 结果表明该系统可以准确检测单个或多个开关的状态.
Abstract
In order to detect the states of multiple switches simultaneously, a multi-switch states detection system based on a semiconductor laser with optical feedbacks is presented. The system consists of a semiconductor laser, multi-switch sensing network, data acquisition and processing unit. The sensing network includes multiple feedback optical circuits made of couplers, optical fibers and intensity reflection optical switches. When all switches are in ‘off’ state, the system has no feedback. Hence the laser outputs continuous light. Once some a switch is in ‘on’ state the feedback light makes the system work at chaotic state. By comparing the sub-peak values, corresponding to each switch position, of the autocorrelation curve of the signal out of the system with a preset threshold value, the switch state can be determined. The interference sub-peaks are eliminated by programing to set the values of sub-peaks in other locations as zero. An experimental system is constructed in which the sensing network is composed of three switches in series. The system is detected in different switch states respectively. The results confirm that the system can accurately detect the states of single or multiple switches.
熊小志, 方捻, 王陆唐, 黄肇明. 基于光反馈半导体激光器的多开关状态检测系统[J]. 光子学报, 2017, 46(3): 0314003. XIONG Xiao-zhi, FANG Nian, WANG Lu-tang, HUANG Zhao-ming. Multi-switch States Detection System Based on Semiconductor Laser with Optical Feedbacks[J]. ACTA PHOTONICA SINICA, 2017, 46(3): 0314003.