Long distance all-optical logic operations through a single multimode fiber empowered by wavefront shaping  

作　　者：ZHIPENG YU TIANTING ZHONG HUANHAO LI HAORAN LI CHI MAN WOO SHENGFU CHENG SHUMING JIAO HONGLIN LIU CHAO LU PUXIANG LAI 

机构地区：[1]Department of Biomedical Engineering,The Hong Kong Polytechnic University,Hong Kong SAR,China [2]Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen 518000,China [3]Peng Cheng Laboratory,Shenzhen 518055,China [4]Key Laboratory for Quantum Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [5]Department of Electronic and Information Engineering,The Hong Kong Polytechnic University,Hong Kong SAR,China [6]Photonics Research Institute,The Hong Kong Polytechnic University,Hong Kong SAR,China

出　　处：《Photonics Research》2024年第3期587-597,共11页光子学研究（英文版）

基　　金：The Hong Kong Polytechnic University(P0038180,P0039517,P0043485,P0045762);Shenzhen Science and Technology Innovation Program(JCYJ20220818100202005);Guangdong Science and Technology Department(2019BT02X105);Hong Kong Research Grant Council(15217721,C7074-21GF,R5029-19);Innovation and Technology Commission(GHP/043/19SZ,GHP/044/19GD);National Natural Science Foundation of China(81930048)。

摘　　要：Multimode fibers(MMFs)are a promising solution for high-throughput signal transmission in the time domain.However,crosstalk among different optical modes within the MMF scrambles input information and creates seemingly random speckle patterns at the output.To characterize this process,a transmission matrix(TM)can be used to relate input and output fields.Recent innovations use TMs to manipulate the output field by shaping the input wavefront for exciting advances in deep-brain imaging,neuron stimulation,quantum networks,and analog operators.However,these approaches consider input/output segments as independent,limiting their use for separate signal processing,such as logic operations.Our proposed method,which makes input/output segments as interdependent,adjusts the phase of corresponding output fields using phase bias maps superimposed on input segments.Coherent superposition enables signal logic operations through a 15-m-long MMF.In experiments,a single optical logic gate containing three basic logic functions and cascading multiple logic gates to handle binary operands is demonstrated.Bitwise operations are performed for multi-bit logic operations,and multiple optical logic gates are reconstructed simultaneously in a single logic gate with polarization multiplexing.The proposed method may open new avenues for long-range logic signal processing and transmission via MMFs.

关 键 词：optical POLARIZATION FIBER 

分 类 号：TN929.11[电子电信—通信与信息系统]