Coupling system to a microsphere cavity
AssigneeCalifornia Institute of Technology
InventorsVladimir Iltchenko, Lute Maleki, Steve Yao, Chi Wu
Life of this patent
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Abstract
A system of coupling optical energy in a waveguide mode, into a resonator that operates in a whispering gallery mode. A first part of the operation uses a fiber in its waveguide mode to couple information into a resonator e.g. a microsphere. The fiber is cleaved at an angle Φ which causes total internal reflection within the fiber. The energy in the fiber then forms an evanescent field and a microsphere is placed in the area of the evanescent field. If the microsphere resonance is resonant with energy in the fiber, then the information in the fiber is effectively transferred to the microsphere.
Claims4
A method comprising:
- forming a cylindrical cavity preform with vertical walls;
- re-shaping said vertical walls in a way that removes a mode field from flat boundaries of the vertical walls;
- treating the resulting shape to form an ellipsoidal geometry;
- and
- rounding and smoothing edges of the ellipsoidal geometry to reduce radiation loss and to form a dielectric resonator body.
Dependencies are inferred from the claim text.