标题： 基于电光聚合物的高线性宽带光调制器 显示英文标题

标题： Highly Linear, Broadband Optical Modulator Based on Electro-optic Polymer

摘要： 本文中，我们介绍了基于电光聚合物的行波定向耦合调制器的设计、制作和表征，该调制器能够提供高线性和宽频带。 通过在双域定向耦合器中引入畴反转技术实现了高线性度。 设计了行波电极，以实现302GHz cm的带宽-长度乘积，通过实现低微波损耗、优异的阻抗匹配和速度匹配以及平滑的电场分布变换。 该器件的3-dB带宽测量为10GHz。 在调制频率范围2-8GHz内，测得无杂散动态范围约为110dB Hz^(2/3)。 据我们所知，这种高线性度是在高达8GHz的频率下首次测量得到的。 此外，使用了1到2的多模干涉3dB分束器、光漂白折射率锥形结构和准垂直锥形结构来降低器件的光学插入损耗。 显示英文摘要

摘要： In this paper, we present the design, fabrication and characterization of a traveling wave directional coupler modulator based on electro-optic polymer, which is able to provide both high linearity and broad bandwidth. The high linearity is realized by introducing domain-inversion technique in the two-domain directional coupler. A travelling wave electrode is designed to function with bandwidth-length product of 302GHz cm, by achieving low microwave loss, excellent impedance matching and velocity matching, as well as smooth electric field profile transformation. The 3-dB bandwidth of the device is measured to be 10GHz. The spurious free dynamic range of about 110dB Hz^(2/3) is measured over the modulation frequency range 2-8GHz. To the best of our knowledge, such high linearity is first measured at the frequency up to 8GHz. In addition, a 1-to-2 multi-mode interference 3dB-splitter, a photobleached refractive index taper and a quasi-vertical taper are used to reduce the optical insertion loss of the device.