基于光电振荡器的光学频率梳生成技术研究
发布时间：2019-06-14 09:28
【摘要】：光学频率梳是一种特殊的激光光源,其频谱表现为一系列等间隔梳状的频率分量。鉴于其频谱的特点,光学频率梳在密集波分复用、高精密测量、光谱分析及高精度标频等领域有着广泛的应用,如何产生平坦度好、边模抑制比高、频谱宽、稳定性好以及谱线条数多的光学频率梳一直是研究者追求的主要目标。而光电振荡器能够产生频谱纯度高、相位噪声低和稳定性高的微波射频信号,因此本文对基于光电振荡器的光学频率梳生成技术开展了系列研究,主要的工作内容如下:(1)综合概述了光学频率梳生成技术的研究背景和意义,回顾了国内外对光学频率梳生成技术和光电振荡器的研究现状。对光电振荡器的结构和基本原理进行了研究,并分析了双环结构对边模的抑制作用。(2)对光学频率梳生成技术进行了系统总结,并研究了基于单偏振/偏振复用双平行马赫曾德尔调制器产生光学频率梳的方案。研究结果表明,通过控制调制器的各个参数,可以产生可调谱线条数的高平坦度、高边模抑制比的光学频率梳。(3)采用偏振复用双平行马赫曾德尔调制器,设计了一种基于光电振荡器的光学频率梳生成新方案。其中一路光分支偏振态的偏转使得两路光信号处于相互正交的偏振状态,在合波时不会发生干涉。同时利用光电振荡器产生高频谱纯度的微波信号,并作为调制器的射频源,产生了平坦度好以及边模抑制比高的光学频率梳。并且通过灵活控制滤波器中心频率、调制器参数和光源波长得到了频率间隔可调、谱线数目可调以及工作中心频率可调的可重构频率梳。
[Abstract]:Optical frequency comb is a special laser light source, and its spectrum is a series of equal interval comb frequency components. In view of the characteristics of its spectrum, optical frequency comb has been widely used in dense wavelength division reuse, high precision measurement, spectral analysis and high precision frequency marking. How to produce optical frequency comb with good flatness, high edge mode rejection ratio, wide spectrum, good stability and large number of spectral lines has always been the main goal pursued by researchers. The photoelectric oscillator can generate microwave RF signals with high spectrum purity, low phase noise and high stability. Therefore, a series of research on optical frequency comb generation technology based on photoelectric oscillator is carried out in this paper. The main contents are as follows: (1) the research background and significance of optical frequency comb generation technology are summarized, and the research status of optical frequency comb generation technology and optoelectronic oscillator at home and abroad is reviewed. The structure and basic principle of photoelectric oscillator are studied, and the suppression effect of double loop structure on edge mode is analyzed. (2) the generation technology of optical frequency comb is systematically summarized, and the scheme of generating optical frequency comb based on single polarization / polarization combination with double parallel Mach Zendell modulator is studied. The results show that Gao Ping flatness with adjustable spectral line number and optical frequency comb with high edge mode rejection ratio can be generated by controlling the parameters of the modulator. (3) A new scheme of optical frequency comb generation based on optoelectronic oscillator is designed by using polarization reuse double parallel Mach Zendell modulator. The polarization state of one optical branch makes the two optical signals in the orthogonal polarization state, and there will be no interference in the combined wave. At the same time, the photoelectric oscillator is used to generate the microwave signal of high frequency spectrum purity, and as the radio frequency source of the modulator, the optical frequency comb with good flatness and high edge mode rejection ratio is produced. By flexibly controlling the central frequency of the filter, the modulator parameters and the wavelength of the light source, the reconfigurable frequency comb with adjustable frequency interval, adjustable number of spectral lines and adjustable working center frequency is obtained.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN752
[Abstract]:Optical frequency comb is a special laser light source, and its spectrum is a series of equal interval comb frequency components. In view of the characteristics of its spectrum, optical frequency comb has been widely used in dense wavelength division reuse, high precision measurement, spectral analysis and high precision frequency marking. How to produce optical frequency comb with good flatness, high edge mode rejection ratio, wide spectrum, good stability and large number of spectral lines has always been the main goal pursued by researchers. The photoelectric oscillator can generate microwave RF signals with high spectrum purity, low phase noise and high stability. Therefore, a series of research on optical frequency comb generation technology based on photoelectric oscillator is carried out in this paper. The main contents are as follows: (1) the research background and significance of optical frequency comb generation technology are summarized, and the research status of optical frequency comb generation technology and optoelectronic oscillator at home and abroad is reviewed. The structure and basic principle of photoelectric oscillator are studied, and the suppression effect of double loop structure on edge mode is analyzed. (2) the generation technology of optical frequency comb is systematically summarized, and the scheme of generating optical frequency comb based on single polarization / polarization combination with double parallel Mach Zendell modulator is studied. The results show that Gao Ping flatness with adjustable spectral line number and optical frequency comb with high edge mode rejection ratio can be generated by controlling the parameters of the modulator. (3) A new scheme of optical frequency comb generation based on optoelectronic oscillator is designed by using polarization reuse double parallel Mach Zendell modulator. The polarization state of one optical branch makes the two optical signals in the orthogonal polarization state, and there will be no interference in the combined wave. At the same time, the photoelectric oscillator is used to generate the microwave signal of high frequency spectrum purity, and as the radio frequency source of the modulator, the optical frequency comb with good flatness and high edge mode rejection ratio is produced. By flexibly controlling the central frequency of the filter, the modulator parameters and the wavelength of the light source, the reconfigurable frequency comb with adjustable frequency interval, adjustable number of spectral lines and adjustable working center frequency is obtained.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN752
【参考文献】
相关期刊论文 前7条
1 王建;蔡海文;陈迪俊;瞿荣辉;;Generation of ultra-flat optical frequency comb using a balanced driven dual parallel Mach Zehnder modulator[J];Chinese Optics Letters;2015年06期
2 李e，
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