Grating-Assisted Directional Coupler in Lithium Niobate for Tunable Mode Filtering

被引：4

作者：

Li, Jun Hui ^{[1
]}

Zhou, Mao Hui ^{[1
]}

Yao, Hao ^{[1
]}

Wang, Meng Ke ^{[1
]}

Wu, Jie Yun ^{[1
]}

Chen, Kai Xin ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, Chengdu 611731, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2021年 / 13卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Optical waveguides; Couplings; Resonator filters; Optical filters; Directional couplers; Gratings; Electrooptical waveguides; Grating-assisted directional coupler; lithium niobate; electro-optic tuning; mode filter; mode-division multiplexing;

D O I：

10.1109/JPHOT.2021.3061089

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We propose a long-period grating assisted directional coupler in lithium niobate (LN) for the realization of electro-optic tunable mode filtering functionality. Our typical device, fabricated with the annealed proton-exchange process and designed for filtering out the fundamental mode in a two-mode LN waveguide, achieves a maximum mode extinction ratio of 29 dB at 1551.7 nm wavelength and a -20 dB bandwidth of similar to 2.5 nm with an electrical wavelength tuning sensitivity of 0.182 nm/V.

引用

页数：8

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