Abstract
An optoelectronic oscillator (OEO) is an optoelectronic hybrid oscillator which utilizes ultra-low-loss fiber as an electro-magnetic energy storage element, overcoming the limits of traditional microwave oscillators in phase noise performance. Due to their ability to generate ultra-low phase noise microwave signal, optoelectronic oscillators have attracted considerable attentions and are becoming one of the most promising and powerful microwave signal sources. In this paper, we briefly introduce the operation principle and discuss current research on frequency stability and spurious suppression of optoelectronic oscillators.
Highlights
Oscillators, as energy conversion devices, can transform a continuous DC signal to a periodic analog signal [1,2], which is the core component of modern electronic systems, such as communication systems [3], radar [4], and electronic warfare [5]
In order to achieve the frequency stability of millimeter-wave (MMW) signal produced by optoelectronic oscillator (OEO), we proposed a novel frequency-de-multiplication shown in Figure 16 [53]
Low phase noise RF oscillators are required in multiple applications, ranging from radar and Global Position System (GPS) to high performance analog to digital converters to trans-oceanic data
Summary
Oscillators, as energy conversion devices, can transform a continuous DC signal to a periodic analog signal [1,2], which is the core component of modern electronic systems, such as communication systems [3], radar [4], and electronic warfare [5]. The energy storage of contemporary microwave oscillators, including dielectric oscillators [13] and crystal oscillators [14,15], are mostly based on electronic and acoustic resonators When these resonators operate at frequencies above. GHz, the energy storage characteristics will drop sharply, and the phase noise of generated high-frequency microwave signals will deteriorate. We will briefly introduce the fundamental structure and operation principle of optoelectronic oscillators and review current research on the enhancement of OEO performance, including spurious mode suppression and long-term frequency stability, which have not been summarized in detail before. This paper is organized as follows: Section two demonstrates the fundamental setup and the analyzes the improvement of OEOs, including spurious suppression and frequency stabilization; principle of an optoelectronic oscillator and briefly summaries the research status; section three.
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