kHz-Resolution Frequency Measurement Based on Selective High-Order Modes in a Micro-Resonator

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-06-17 DOI:10.1109/LPT.2025.3580637

Yuwei Jian;Wufei Zhou;Wenping Zhong;Jinxin Li;Ruiqi Zheng;Jingxu Chen;Lingzhi Li;Jiejun Zhang;Jianping Yao

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引用次数: 0

Abstract

We propose a photonic microwave frequency measurement system with kHz resolution for the instantaneous measurement of the Doppler frequency shift (DFS)of a moving object. By joint use of an optical frequency comb (OFC) generator implemented by cascading an intensity modulator (IM) and a phase modulator (PM) and a high-Q metal-coated micro-disk resonator (MDR), an ultra-sensitive amplitude comparison function (ACF) for frequency-to-power mapping is established, which enables ultra-high sensitivity frequency measurement. The proposed technique is experimentally demonstrated. A Doppler signal is applied to the two modulators to generate multiple sidebands corresponding to an optical comb. By aligning the ±3-rd order sidebands with the steep slopes of two adjacent notches of the metal-coated MDR, an ACF is obtained. A frequency measurement sensitivity of 2.28 dB/MHz is experimentally achieved. With a power measurement resolution of 0.01 dB, the frequency measurement resolution is 4.37 kHz, which is the highest ever reported based on photonic techniques. It enables Doppler frequency shift measurement for an object moving at speeds between 40.34 to 1384 m/s.

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基于微谐振腔中选择性高阶模式的khz分辨率频率测量

提出了一种千赫分辨率的光子微波频率测量系统，用于瞬时测量运动物体的多普勒频移。通过级联强度调制器（IM）和相位调制器（PM）实现的光频梳（OFC）发生器和高q金属涂层微盘谐振器（MDR）的联合使用，建立了用于频率-功率映射的超灵敏幅度比较函数（ACF），实现了超高灵敏度的频率测量。实验证明了所提出的技术。将多普勒信号加到两个调制器上，产生对应于光梳的多个边带。通过将±3阶边带对准金属包覆MDR的两个相邻缺口的陡坡，得到了一个ACF。实验测频灵敏度为2.28 dB/MHz。功率测量分辨率为0.01 dB，频率测量分辨率为4.37 kHz，是目前报道的基于光子技术的最高分辨率。它可以对速度在40.34到1384米/秒之间的物体进行多普勒频移测量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.