解调
光学
失真(音乐)
波形
相位调制
相位畸变
调制(音乐)
干涉测量
相(物质)
信号(编程语言)
噪音(视频)
物理
计算机科学
相位噪声
电信
声学
带宽(计算)
图像(数学)
频道(广播)
人工智能
放大器
量子力学
程序设计语言
雷达
作者
Yisbel E. Marin,Philippe Velha,Claudio J. Otón
出处
期刊:Optics Express
[The Optical Society]
日期:2020-11-19
卷期号:28 (24): 36849-36849
被引量:13
摘要
We present a novel phase generated carrier (PGC) demodulation technique for homodyne interferometers which is robust to modulation depth variations and source intensity fluctuations. By digitally mixing the waveform with a multitone synthetic function (a linear combination of harmonics of the modulating signal), distortion can become negligible even in presence of large variations of the modulation depth. The technique only requires two mixers and can also provide the DC component of the phase in real time, without needing any previously recorded data or ellipse-fitting algorithms. We validate the technique with simulated waveforms and with experimental data from a wavelength metering experiment using an integrated unbalanced interferometer on-chip, showing that the technique corrects distortion without increasing the noise with respect to the standard PGC technique.
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