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作 者:KE TIAN JIBO YU FUCHUAN LEI JONATHAN WARD ANGZHEN LI PENGFEI WANG SÍLE NIC CHORMAIC
机构地区:[1]Okinawa Institute of Science and Technology Graduate University,Onna,Okinawa 904-0495,Japan [2]Key Laboratory of In-Fiber Integrated Optics of Ministry of Education,College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China [3]Department of Microtechnology and Nanoscience,Chalmers University of Technology,SE-41296 Gothenburg,Sweden [4]Physics Department,University College Cork,Cork,Ireland [5]Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China
出 处:《Photonics Research》2022年第9期2073-2080,共8页光子学研究(英文版)
基 金:Okinawa Institute of Science and Technology Graduate University;China Scholarship Council(201906680);Harbin Engineering University Scholarship Fund;JSPS Grant-in-Aid for Early-Career Scientists(Kakenhi)(22K14621)。
摘 要:There are extensive studies to date on optical nonlinearities in microcavities at the near and mid-IR wavelengths.Pushing this research into the visible region is equally valuable.Here,we demonstrate a directly pumped,blue band Kerr frequency comb and stimulated Raman scattering(SRS)at 462 nm in a silica nanofiber-coupled whispering gallery microcavity system.Notably,due to the high optical intensities achieved,photodarkening is unavoidable and can quickly degrade the optical quality of both the coupling optical nanofiber and the microcavity,even at very low pump powers.Nonetheless,stable hyperparametric oscillation and SRS are demonstrated in the presence of photodarkening by taking advantage of in-situ thermal bleaching.This work highlights the challenges of silica-based,short wavelength nonlinear optics in high-quality,small mode volume devices and gives an effective method to overcome this apparent limitation,thus providing a baseline for optics research in the blue region for any optical devices fabricated from silica.
关 键 词:PUMPED PUMP scattering
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