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Ring resonator based electro-optic polymer modulators for microwave photonics applications.

机译：基于环形谐振器的电光聚合物调制器，用于微波光子学。

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摘要

This dissertation presents the study of ring resonator based electro-optic polymer optical modulators for microwave photonics applications. Particularly, the work focuses on two important requirements for external modulators in analog optical links: high sensitivity at a high frequency and the linearity of a modulator.; The first portion of this work addresses the analysis of ring modulators in terms of the modulation sensitivity and the modulation bandwidth. The general expression to analyze the modulation frequency response of a ring modulator is derived and applied to traveling-wave ring modulators. The modulators show high modulation efficiency at frequencies around all multiples of the free spectral range, and have better tolerance for the optical/microwave velocity mismatch and microwave loss of the electrode than traveling-wave Mach-Zehnder modulators.; Second, the band operation in an electro-optic polymer ring modulator with a traveling-wave electrode is experimentally demonstrated. The Q of the ring resonator is 45,000 at 1.31 mum, and the electro-optic tuning sensitivity is 1 GHz/V. The modulator shows efficient modulation in a 7 GHz band centered at 28 GHz. This modulation enhancement is due to optical resonance. The device design, fabrication, and characterization are described in detail.; Finally, the linearity of a ring modulator is theoretically analyzed and experimentally studied. It is shown that ring modulators have the potential to obtain a high intermodulation-free dynamic range in sub-octave bandpass optical links, because they have a bias point at which the third derivative of the transfer function is zero; eliminating third-order distortion. The scheme to expand the dynamic range using dual parallel ring modulator is proposed. The experimental result of an electro-optic polymer ring modulator clearly shows a suppression of third-order distortion at a certain bias point, verifying the theory. A linearized ring resonator assisted Mach-Zehnder electro-optic modulator is also analyzed. It is shown that the linearization bandwidth of the modulator is limited by the resonant nature of a ring resonator.
机译：本文提出了基于环形谐振腔的用于微波光子学的电光聚合物光调制器的研究。特别地，工作集中在模拟光链路中对外部调制器的两个重要要求：高频下的高灵敏度和调制器的线性度；以及这项工作的第一部分针对环形调制器的调制灵敏度和调制带宽进行了分析。推导了用于分析环形调制器的调制频率响应的一般表达式，并将其应用于行波环形调制器。与行波马赫曾德尔调制器相比，调制器在自由光谱范围的所有倍数附近的频率上均显示出高调制效率，并且对电极的光/微波速度失配和微波损耗具有更好的容忍度。其次，实验证明了在具有行波电极的电光聚合物环形调制器中的频带操作。环形谐振器的Q在1.31μm时为45,000，电光调谐灵敏度为1 GHz / V。调制器在以28 GHz为中心的7 GHz频带中显示出有效的调制。这种调制增强是由于光学共振。详细描述了器件的设计，制造和表征。最后，对环形调制器的线性进行了理论分析和实验研究。结果表明，环形调制器在亚倍频程带通光学链路中具有获得高互调动态范围的潜力，因为它们具有一个偏置点，传递函数的三阶导数为零。消除三阶失真。提出了使用双并行环形调制器扩展动态范围的方案。电光聚合物环形调制器的实验结果清楚地表明了在某个偏置点上对三阶失真的抑制，从而证明了这一理论。还分析了线性化环形谐振器辅助的Mach-Zehnder电光调制器。示出了调制器的线性化带宽受到环形谐振器的谐振特性的限制。

著录项

  • 作者

    Tazawa, Hidehisa.;

  • 作者单位

    University of Southern California.;

  • 授予单位 University of Southern California.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 99 p.
  • 总页数 99
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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