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Position-dependent coupling between a channel waveguide and a distorted microsphere resonator
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10.1063/1.3327418
/content/aip/journal/jap/107/5/10.1063/1.3327418
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/5/10.1063/1.3327418

Figures

Image of FIG. 1.
FIG. 1.

Images of microsphere attached to fiber taper from the (a) top view and (b) side view in the plane normal to the direction of propagation of light in the waveguide.

Image of FIG. 2.
FIG. 2.

Measurement setup used for the optical coupling from planar waveguide to microsphere resonator and resonance characterization.

Image of FIG. 3.
FIG. 3.

Resonance spectra of a microsphere coupled to a planar waveguide at various Teflon (x) separations.

Image of FIG. 4.
FIG. 4.

Measured (a) Q-factor, (b) peak (scattered) power, and (c) resonance peak wavelength shift of microsphere at various Teflon thicknesses for the , 2, and 3 resonances closest to 1465 nm.

Image of FIG. 5.
FIG. 5.

Resonance spectra of a microsphere at various distances from the center of the waveguide (on both sides) at Teflon thickness of 460 nm.

Image of FIG. 6.
FIG. 6.

Q-factor of the microsphere at various distances from the center of the waveguide for three different Teflon thicknesses at a wavelength of 1550 nm.

Image of FIG. 7.
FIG. 7.

Experimentally measured resonance spectrum and theoretically fitted curves for the microsphere at 330 nm Teflon thickness and from the waveguide center. The figure also shows the assigned radial and azimuthal mode numbers of various resonance peaks for the TM polarization.

Image of FIG. 8.
FIG. 8.

Coupling factor estimated as a result of the overlap integration for various radial modes at about 1445 nm at various Teflon separations.

Image of FIG. 9.
FIG. 9.

Calculated normalized circulating power and averaged scattered peak power for various radial modes at various Teflon separations.

Image of FIG. 10.
FIG. 10.

Image of the microsphere resonator showing ellipticity and angular misalignment.

Image of FIG. 11.
FIG. 11.

Detail of the resonance spectrum for resonances near 1455 nm with the sphere separated from the waveguide by 70 nm Teflon, and for lateral positions between . (a) mode, (b) mode, and (c) mode.

Image of FIG. 12.
FIG. 12.

Detail of the resonance spectrum for resonances near 1455 nm with the sphere centered above the waveguide for separations of 0–740 nm. (a) mode, (b) mode, and (c) mode.

Tables

Generic image for table
Table I.

Experimental and theoretical resonant wavelengths and assigned microsphere mode numbers ( and ).

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/content/aip/journal/jap/107/5/10.1063/1.3327418
2010-03-04
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Position-dependent coupling between a channel waveguide and a distorted microsphere resonator
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/5/10.1063/1.3327418
10.1063/1.3327418
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