Microwave photonic approaches for the generation of microwave signals have attracted substantial attention in recent years, thanks to the significant advantages brought by photonics technology, such as high frequency, large bandwidth, and immunity to electromagnetic interference. An optoelectronic oscillator (OEO) is a paradigmatic microwave photonic oscillator that produces microwave signals with ultra-low phase noise, thanks to the high-quality-factor of the OEO cavity that is achieved with the help of optical energy storage elements, such as low-loss optical fiber or a high-quality-factor optical resonator. Different OEO architectures have been proposed to generate spectrally pure single-frequency microwave signals with ultra-low phase noise. Multiple oscillation mode control methods have been proposed in recent years to obtain different kinds of microwave signals. With the rapid development of photonic integration technologies, prototypes of integrated OEOs have been demonstrated with compact size and low power consumption. Moreover, OEOs have also been used for sensing, computing, and signal processing. This Tutorial aims to provide a comprehensive introduction to the developments of OEOs. We first discuss the basic principle and the key phase noise property of OEOs and then focus on its developments in spectrally pure low phase noise signal generation and mode control methods, its chip-scale integration, and its applications in various fields.

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光电振荡器教程

近年来，由于光子技术带来的高频、大带宽和抗电磁干扰等显着优势，用于产生微波信号的微波光子方法引起了广泛关注。光电振荡器 (OEO) 是一种典型的微波光子振荡器，可产生具有超低相位噪声的微波信号，这要归功于在光学能量存储元件的帮助下实现的 OEO 腔的高品质因数，例如低-损耗光纤或高品质因数的光谐振器。已经提出了不同的 OEO 架构来生成具有超低相位噪声的纯频谱单频微波信号。近年来提出了多种振荡模式控制方法来获得不同种类的微波信号。随着光子集成技术的快速发展，集成OEO的原型已经被证明具有紧凑的尺寸和低功耗。此外，OEO 还用于传感、计算和信号处理。本教程旨在全面介绍 OEO 的发展。我们首先讨论OEO的基本原理和关键相位噪声特性，然后重点讨论其在频谱纯低相位噪声信号生成和模式控制方法、芯片级集成及其在各个领域的应用方面的发展。集成 OEO 的原型已被证明具有紧凑的尺寸和低功耗。此外，OEO 还用于传感、计算和信号处理。本教程旨在全面介绍 OEO 的发展。我们首先讨论OEO的基本原理和关键相位噪声特性，然后重点讨论其在频谱纯低相位噪声信号生成和模式控制方法、芯片级集成及其在各个领域的应用方面的发展。集成 OEO 的原型已被证明具有紧凑的尺寸和低功耗。此外，OEO 还用于传感、计算和信号处理。本教程旨在全面介绍 OEO 的发展。我们首先讨论OEO的基本原理和关键相位噪声特性，然后重点讨论其在频谱纯低相位噪声信号生成和模式控制方法、芯片级集成及其在各个领域的应用方面的发展。