Mid-infrared chalcogenide microfiber knot resonators

查看全文 作　　者：YU [1]XIE;DAWEI [1]CAI;HAO [1]WU;JING [1]PAN;NING [1]ZHOU;CHENGUANG [1]XIN;SHAOLIANG [1]YU;PAN [1]WANG;XIAOSHUN [2]JIANG;JIANRONG [1]QIU;XIN [1]GUO;LIMIN [1,3,4]TONG

机构地区：[1]State Key Laboratory of Modern Optical Instrumentation,College of Optical Science and Engineering,Zhejiang University;[2]National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,Nanjing University;[3]Collaborative Innovation Center of Extreme Optics,Shanxi University

出　　处：《Photonics Research》索引2020年第8卷第4期,共6页

基　　金：National Natural Science Foundation of China(11527901,61635009,61922040);Fundamental Research Funds for the Central Universities。 摘　　要：A novel type of mid-IR microresonator,the chalcogenide glass(ChG)microfiber knot resonator(MKR),is demonstrated,showing easy fabrication,fiber-compatible features,resonance tunability,and high robustness.ChG micro fibers with typical diameters around 3μm are taper-drawn from As2S3 glass fibers and assembled into MKRs in liquid without surface damage.The measured Q factor of a typical 824μm diameter ChG MKR is about 2.84×104 at the wavelength of 4469.14 nm.The free spectral range(FSR)of the MKR can be tuned from2.0 nm(28.4 GHz)to 9.6 nm(135.9 GHz)by tightening the knot structure in liquid.Benefitting from the high thermal expansion coefficient of As2S3 glass,the MKR exhibits a thermal tuning rate of 110 pm·℃^-1 at the resonance peak.When embedded in polymethyl methacrylate(PMMA)film,a 551μm diameter MKR retains a Q factor of 1.1×10^4.The ChG MKRs demonstrated here are highly promising for resonator-based optical technologies and applications in the mid-IR spectral range. 关键词：MID-INFRARED CHALCOGENIDE microfiber knot resonators

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Mid-infrared chalcogenide microfiber knot resonators

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