解调
椭圆
光学
干扰(通信)
噪音(视频)
干涉测量
相(物质)
信号(编程语言)
强度(物理)
物理
相位噪声
光强度
降噪
计算机科学
电信
声学
人工智能
频道(广播)
图像(数学)
程序设计语言
量子力学
天文
作者
Chongxu Fang,Jinhui Shi,Zhenyu Fu,Wen Zhou,Jihao Zhang,Yuanfei Gong,Dong Guang,Shengquan Mu,Cheng Zuo,Xuqiang Wu,Mingyuan Zhou,Benli Yu
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-03-22
卷期号:48 (7): 1690-1690
被引量:2
摘要
An improved ellipse-fitting algorithm phase demodulation (EFAPD) technique is proposed to reduce the influence of light source intensity noise on a system. In the original EFAPD, the sum of the intensities of coherent light (ICLS) is an important part of the interference signal noise, which makes the demodulation results suffer. The improved EFAPD corrects the ICLS and fringe contrast quantity of the interference signal by an ellipse-fitting algorithm, and then calculates the ICLS based on the structure of pull-cone 3 × 3 coupler, so as to remove it in the algorithm. Experimental results show that the noise of the improved EFAPD system is significantly reduced compared with that of the original EFAPD, with a maximum reduction of 35.57 dB. The improved EFAPD makes up for the deficiency of the original EFAPD in suppressing light source intensity noise, and promotes the application and popularization of EFAPD.
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