High Q-factor reconfigurable microresonators induced in side-coupled optical fibres  

作　　者：Victor Vassiliev Michael Sumetsky 

机构地区：[1]Aston Institute of Photonic Technologies,Aston University,Birmingham B47ET,UK

出　　处：《Light(Science & Applications)》2023年第9期1867-1876,共10页光（科学与应用)（英文版）

基　　金：The work on the paper was supported by the Engineering and Physical Sciences Research Council(EPSRC)(grants EP/P006183/1 and EP/W002868/1);Horizon 2020 MSCA-ITN-EID(grant 814147);Leverhulme Trust(grant RPG-2022-014).

摘　　要：High Q-factor monolithic optical microresonators found numerous applications in classical and quantum optical signal processing,microwave photonics,ultraprecise sensing,as well as fundamental optical and physical sciences.However,due to the solid structure of these microresonators,attaining the free spectral range tunability of most of them,critical for several of these applications,was,so far,unfeasible.To address this problem,here we experimentally demonstrate that the side-coupling of coplanar bent optical fibres can induce a high Q-factor whispering gallery mode optical microresonator.By changing the curvature radius of fibres from the centimetre order to the millimetre order,we demonstrate fully mechanically reconfigurable optical microresonators with dimensions varying from the millimetre order to 100-micron order and free spectral range varying from a picometre to ten picometre order.The developed theory describes the formation of the discovered microresonators and their major properties in a reasonable agreement with the experimental data.The new microresonators may find applications in cavity QED,microresonator optomechanics,frequency comb generation with tuneable repetition rate,tuneable lasing,and tuneable processing and delay of optical pulses.

关 键 词：RECONFIGURABLE RESONATOR REPETITION 

分 类 号：TN2[电子电信—物理电子学]