Liu Bin, Ruan Yuxi, Yu Yanguang, Guo Qinghua, Xi Jiangtao, Tong Jun
Opt Express. 2019 Feb 18;27(4):4090-4104. doi: 10.1364/OE.27.004090.
An optical feedback laser diode (OFLD) operating in period-one oscillation (POO) with a moving external target is investigated by exploring its potential sensing capability. First, the modeling of an OFLD-POO sensing system is presented. An analytical expression is derived for OFLD-POO sensing signal, from which a new displacement measurement method is developed. The proposed sensing model is verified by the well-known Lang-Kobayashi equations used to describe the dynamic behavior of a laser with optical feedback. Then, an experimental OFLD-POO system is built in order to demonstrate an application example for displacement sensing. The measurement results show that the OFLD-POO sensing system can achieve displacement measurement with large measurement range, high sensitivity, and resolution.
通过探索其潜在的传感能力，研究了一种在周期一振荡（POO）模式下运行且带有移动外部目标的光反馈激光二极管（OFLD）。首先，给出了OFLD-POO传感系统的建模。推导了OFLD-POO传感信号的解析表达式，据此开发了一种新的位移测量方法。所提出的传感模型通过用于描述具有光反馈的激光器动态行为的著名朗-小林方程进行了验证。然后，构建了一个实验性的OFLD-POO系统，以展示位移传感的一个应用实例。测量结果表明，OFLD-POO传感系统能够实现大测量范围、高灵敏度和高分辨率的位移测量。
