一种混合电光聚合物与二氧化钛双槽波导调制器。

A hybrid electro-optic polymer and TiO2 double-slot waveguide modulator.

作者信息

Qiu Feng, Spring Andrew M, Maeda Daisuke, Ozawa Masa-aki, Odoi Keisuke, Otomo Akira, Aoki Isao, Yokoyama Shiyoshi

机构信息

Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen Kasuga-city, Fukuoka, 816-8580 Japan.

Nissan Chemical Industries, LTD, 2-10-1 Tuboi Nishi, Funabashi, Chiba 274-8507, Japan.

出版信息

Sci Rep. 2015 Feb 24;5:8561. doi: 10.1038/srep08561.

DOI:10.1038/srep08561

PMID:25708425

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4338480/

Abstract

An electro-optic (EO) modulator using a TiO2 slot hybrid waveguide has been designed and fabricated. Optical mode calculations revealed that the mode was primarily confined within the slots when using a double-slot configuration, thus achieving a high EO activity experimentally. The TiO2 slots also acted as an important barrier to induce an enhanced DC field during the poling of the EO polymer and the driving of the EO modulator. The hybrid phase modulator exhibited a driving voltage (Vπ) of 1.6 V at 1550 nm, which can be further reduced to 0.8 V in a 1 cm-long push-pull Mach-Zehnder interferometer (MZI) structure. The modulator demonstrated a low propagation loss of 5 dB/cm and a relatively high end-fire coupling efficiency.

摘要

一种采用二氧化钛槽型混合波导的电光（EO）调制器已被设计并制造出来。光学模式计算表明，当采用双槽配置时，模式主要限制在槽内，从而在实验中实现了高电光活性。二氧化钛槽在电光聚合物极化和电光调制器驱动过程中还起到了诱导增强直流电场的重要屏障作用。该混合相位调制器在1550 nm波长下的驱动电压（Vπ）为1.6 V，在1 cm长的推挽马赫-曾德尔干涉仪（MZI）结构中可进一步降至0.8 V。该调制器表现出5 dB/cm的低传播损耗和相对较高的端射耦合效率。