窄带
中心频率
相位噪声
宽带
滤波器(信号处理)
信号(编程语言)
带通滤波器
中频
本振子
无线电频率
噪音(视频)
光学
物理
声学
电信
计算机科学
电气工程
工程类
图像(数学)
人工智能
程序设计语言
作者
Zeev Tamir,Asher Meltzer,Moshe Horowitz
出处
期刊:Optics Letters
[The Optical Society]
日期:2017-06-30
卷期号:42 (14): 2671-2671
被引量:7
摘要
We demonstrate a new method to obtain a widely tunable low phase-noise opto-electronic oscillator (OEO), based on translating the OEO signal into a lower intermediate frequency (IF) signal. The OEO signal is downconverted to IF by using a local oscillator (LO) signal, filtered by a high-Q filter; its frequency is then upconverted back into the high OEO frequency. The combination of a narrowband filter at a fixed central frequency with a tunable LO forms a tunable high-Q bandpass filter (BPF) that can be used to change the OEO frequency over a broad frequency region. The effect of the LO phase noise on the OEO is suppressed by the dual frequency conversions. Hence, a tunable LO with a high phase noise can be used to control the frequency of a very low phase-noise OEO. The use of a BPF with a lower center frequency than that of the OEO signal also enables increasing the effective Q-factor of the OEO filter.
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