光学
信号(编程语言)
材料科学
低语长廊波浪
带宽(计算)
谐振器
物理
微波食品加热
计算机科学
电信
程序设计语言
作者
Yangyang Wan,Xinyu Fan,Bingxin Xu,Zuyuan He
出处
期刊:Optics Letters
[The Optical Society]
日期:2021-09-13
卷期号:46 (19): 5008-5008
被引量:8
摘要
We propose and experimentally demonstrate a novel method for photonic-assisted microwave frequency measurement based on whispering-gallery mode (WGM) barcode, which is a dense spectrum generated by a micro-resonator that supports a large number of optical modes. The measurement relies on the relation between the microwave frequency and its unique barcode. The proposed system has the advantages of wide bandwidth, high accuracy, and multiple-frequency measurement capability. Microwave frequency measurement from 1 to 20 GHz is experimentally demonstrated with a measurement error of 40 kHz. For multi-tone signals, the frequency resolution is demonstrated to be less than 20 MHz. A dynamic multi-tone microwave signal consists of a 16–20 GHz linear frequency-modulated (LFM) signal, and a 10 GHz signal is measured to show the capability of multiple-frequency measurement. The system stability is also evaluated, and a self-reference method is proposed to maintain a long-term high-accuracy measurement.
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