Precise mode control of laser-written waveguides for broadband,low-dispersion 3D integrated opticsOACSTPCD
Precise mode control of laser-written waveguides for broadband,low-dispersion 3D integrated optics
Three-dimensional(3D)glass chips are promising waveguide platforms for building hybrid 3D photonic circuits due to their 3D topological capabilities,large transparent windows,and low coupling dispersion.At present,the key challenge in scaling down a benchtop optical system to a glass chip is the lack of precise methods for controlling the mode field and optical coupling of 3D waveguide circuits.Here,we propose an overlap-controlled multi-scan(OCMS)method based on laser-direct lithography that allows customizing the refractive index profile of 3D waveguides with high spatial precision in a variety of glasses.On the basis of this method,we achieve variable mode-field distribution,robust and broadband coupling,and thereby demonstrate dispersionless LP21-mode conversion of supercontinuum pulses with the largest deviation of＜0.1 dB in coupling ratios on 210 nm broadband.This approach provides a route to achieve ultra-broadband and low-dispersion coupling in 3D photonic circuits,with overwhelming advantages over conventional planar waveguide-optic platforms for on-chip transmission and manipulation of ultrashort laser pulses and broadband supercontinuum.
Yuying Wang;Limin Tong;Kin Seng Chiang;Dezhi Tan;Jianrong Qiu;Lijing Zhong;Kuen Yao Lau;Xuhu Han;Yi Yang;Jiacheng Hu;Sergei Firstov;Zhi Chen;Zhijun Ma
College of Optical Science and Engineering,Zhejiang University,310027 Hangzhou,ChinaDepartment of Electrical Engineering,City University of Hong Kong,83 Tat Chee Avenue,Kowloon,Hong Kong SAR,ChinaZhejiang Lab,311121 Hangzhou,China||School of Materials Science and Engineering,Zhejiang University,310027 Hangzhou,ChinaCollege of Optical Science and Engineering,Zhejiang University,310027 Hangzhou,China||Institute of Light+X Science and Technology,College of Information Science and Engineering,Ningbo University,315211 Ningbo,ChinaInstitute of Light+X Science and Technology,College of Information Science and Engineering,Ningbo University,315211 Ningbo,ChinaSchool of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,215006 Suzhou,ChinaProkhorov General Physics Institute of the Russian Academy of Sciences,Dianov Fiber Optics Research Center,38 Vavilov str.,Moscow 119333,RussiaZhejiang Lab,311121 Hangzhou,China||College of Materials Science and Engineering,Key Laboratory of Advanced Materials of Yunnan Province,Kunming University of Science and Technology,650093 Kunming,Yunnan,ChinaZhejiang Lab,311121 Hangzhou,China
《光：科学与应用（英文版）》 2024 (006)
1186-1195 / 10
This work was supported by the National Key R&D Program of China(No.2021YFB2802000),National Natural Science Foundation of China(Nos.U20A20211,62275233,62005164,62375246,and 62105297),"Pioneer"and"Leading Goose"R&D Program of Zhejiang(2023C03089),and Zhejiang Provincial Natural Science Foundation(Nos.LZ23F050002 and LQ22F050022).
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