Multibit NOT logic gate enabled by a function programmable optical waveguide

被引:11
|
作者
Chen, Tao [1 ,2 ]
Dang, Zhangqi [1 ,2 ]
Ding, Zhenming [1 ,2 ]
Liu, Zexu [1 ,2 ]
Zhang, Ziyang [2 ]
机构
[1] Zhejiang Univ, Coll Informat Sci & Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China
[2] Westlake Univ, Sch Engn, Lab Photon Integrat, Hangzhou 310024, Zhejiang, Peoples R China
关键词
DESIGN;
D O I
10.1364/OL.458516
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Multibit logic gates are of great importance in optical switching and photonic computing. A 4-bit parallel optical NOT logic gate is demonstrated by an optical switching/computing engine based on a multimode waveguide. The multimode interference (MMI) patterns can be altered by thermal electrodes because the number of guided modes, their profiles, and propagation constants can all be altered via the thermooptic effect. Instead of conventional forward design based on time-consuming simulations, the proposed engine can update the thermal electrodes automatically and monitor the change of the interference in a synchronized and rapid way until the desired function is reached, all experimentally. We name the system "function programmable waveguide engine" (UWE). As opposed to solutions where the phase or amplitude of light is taken as the signal, the input stays in the electronic domain, and the output is converted into optical intensity variations, calculated from a truth table. This simple, low-cost yet powerful engine may lead to the development of a new set of devices for on-chip photonic computing and signal switching. (C) 2022 Optica Publishing Group
引用
收藏
页码:3519 / 3522
页数:4
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