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1Review of advanced progress ofχ^(2)-based all-optical devices on thin-film lithium niobate显示文摘The technological innovation of thin-film lithium niobate(TFLN)is supplanting the traditional lithium niobate industry and generating a vast array of ultra-compact and low-loss optical waveguide devices,providing an unprecedented prospect for chip-scale integrated optics.Because of its unique strong quadratic nonlinearity,TFLN is widely used to create new coherent light,which significantly promotes all-optical signal processes,especially in terms of speed.Herein,we review recent advances in TFLN,review the thorough optimization strategies of all-optical devices with unique characteristics based on TFLN,and discuss the challenges and perspectives of the developed nonlinear devices.石磊 宋元军 唐杰 秦妍妍 薛小枚 周桓立 陈泽贤 李选 钱广 张晓阳 张彤 2023Chinese Optics Letters2023,21,10:0
2Doubly resonant second-harmonic generation in a fiber-based tunable open microcavity显示文摘Microcavities constructed from materials with a second-order nonlinear coefficient have enabled efficient second-harmonic(SH)generation at a low power level.However,it is still technically challenging to realize double resonance with large nonlinear modal overlap in a microcavity.Here,we propose a design for a robust,tunable,and easy coupling double-resonance SH generation based on the combination of a newly developed fiber-based Fabry-Perot microcavity and a sandwich structure,whose numerical SH conversion efficiency is up to 3000%W^(-1).This proposal provides a feasible way to construct ultra-efficient nonlinear devices for generation of classical and quantum light sources.孔欣航 刘卓俊 宋丽军 邱贵鑫 王栩莹 马剑涛 魏敦钊 刘进 2023Chinese Optics Letters2023,21,11:0
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