Microtaper fiber excitation effects in bottle microresonators

We have carried out a systematic study of the effect of microtaper diameter on the spectral characteristics of bottle microresonators. By increasing the microtaper-diameter (Dt) from 2μm to 10μm results in progressively cleaner spectra. The transmission depth at resonance varies from ~15dB (@Dt=2μm) to >3dB (@Dt=10μm). The loaded Q factors were measured to be >10+6 in all cases. However, with microtaper Dt=10μm clearly-resolved single resonance peaks could be observed and free-spectral ranges could be easily identified. At some transmission resonances, we have observed LP01→LP11 mode transformation at the excitation microtaper waist, for the first time, as the resonance is scanned.

[1]  K. Vahala,et al.  Ideality in a fiber-taper-coupled microresonator system for application to cavity quantum electrodynamics. , 2003, Physical review letters.

[2]  M. Sumetsky,et al.  Whispering-gallery-bottle microcavities: the three-dimensional etalon. , 2004, Optics letters.

[3]  D. Meschede,et al.  Tunable whispering-gallery-mode resonators for cavity quantum electrodynamics , 2005 .

[4]  J. Knight,et al.  Phase-matched excitation of whispering-gallery-mode resonances by a fiber taper. , 1997, Optics letters.

[5]  Michalis N. Zervas,et al.  Whispering gallery mode selection in optical bottle microresonators , 2012 .

[6]  A. Matsko,et al.  Optical resonators with whispering-gallery modes-part II: applications , 2006, IEEE Journal of Selected Topics in Quantum Electronics.

[7]  James S. Wilkinson,et al.  Optical microdiscus resonators by flattening microspheres , 2012 .

[8]  R. Chang,et al.  Laser diagnostics for droplet characterization: Application of morphology dependent resonances , 1996 .

[9]  James S. Wilkinson,et al.  Hollow-bottle optical microresonators , 2011, CLEO 2011.

[10]  J. Knight,et al.  High-resolution measurement of the fiber diameter variations using whispering gallery modes and no optical alignment , 2000, IEEE Photonics Technology Letters.

[11]  M. N. Zervas,et al.  Optical microdiscus resonators , 2012, 2012 Conference on Lasers and Electro-Optics (CLEO).

[12]  K. Vahala.  Optical microcavities , 2003, Nature.

[13]  E. R. Thoen,et al.  Ultra-compact Si-SiO2 microring resonator optical channel dropping filters , 1998, IEEE Photonics Technology Letters.

[14]  M.L. Gorodetsky,et al.  Geometrical theory of whispering-gallery modes , 2006, IEEE Journal of Selected Topics in Quantum Electronics.

[15]  N. Hodgson,et al.  Laser Resonators and Beam Propagation , 2005 .

[16]  James S Wilkinson,et al.  Selective excitation of whispering gallery modes in a novel bottle microresonator. , 2009, Optics express.

[17]  Vladimir S. Ilchenko,et al.  Ultimate Q of optical microsphere resonators , 1996, Other Conferences.

[18]  D. R. Hall,et al.  The Physics and Technology of Laser Resonators , 2020 .

[19]  David Carnegie,et al.  Fiber coupling to BaTiO3 glass microspheres in an aqueous environment. , 2011, Optics letters.