Transverse closed-loop resonator
First Claim
1. A transverse closed-loop waveguide resonator comprising:
- an inner cladding having a surface peripherally forming a closed-loop shape for confining light to the surface, the inner cladding having a first diameter thickness and a first index of refraction profile in a cross-sectional portion of the transverse closed-loop resonator; and
a ringed-core corresponding to the closed-loop shape disposed on the corresponding surface of the inner cladding, the ringed-core having a second thickness of material thinner than the first diameter thickness, and a second index of refraction profile greater than the first index of the inner cladding by an index delta in the cross-sectional portion of the transverse closed-loop resonator such that the ringed-core can guide light within the ringed-core traversely around the closed-loop shape.
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Abstract
A transverse closed-loop fiber resonator (10) includes an inner cladding (102) having a surface (300) peripherally forming a closed-loop shape for confining light to the surface (300). The inner cladding has a first diameter thickness (104) and a first index of refraction profile in a cross-sectional portion of the transverse closed-loop fiber resonator (10). A ringed-core (120) corresponding to the closed-loop shape is disposed on the corresponding surface of the inner cladding (102). The ringed-core (120) has a second thickness (124) of material thinner than the first diameter thickness (104), and a second index of refraction profile greater than the first index of the inner cladding by an index delta in the cross-sectional portion of the transverse closed-loop fiber resonator such that the ringed-core can guide light within the ringed-core traversely around the closed-loop shape.
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Citations
32 Claims
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1. A transverse closed-loop waveguide resonator comprising:
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an inner cladding having a surface peripherally forming a closed-loop shape for confining light to the surface, the inner cladding having a first diameter thickness and a first index of refraction profile in a cross-sectional portion of the transverse closed-loop resonator; and
a ringed-core corresponding to the closed-loop shape disposed on the corresponding surface of the inner cladding, the ringed-core having a second thickness of material thinner than the first diameter thickness, and a second index of refraction profile greater than the first index of the inner cladding by an index delta in the cross-sectional portion of the transverse closed-loop resonator such that the ringed-core can guide light within the ringed-core traversely around the closed-loop shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An orthogonal resonating coupler, comprising:
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a transmission waveguide having a propagation direction parallel to an optical axis and having a guided longitudinal mode with a first external evanescent field;
a resonating fiber having a propagation direction circumferential to a longitudinal axis and having a guided circumferential mode with a second external evanescent field; and
an interaction region closely spaced between the transmission waveguide and the resonating fiber for orthogonally coupling the first and second evanescent fields. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method of orthogonally resonating evanescent fields, comprising:
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providing an optical transmission in a propagation direction parallel to an optical axis and having a single guided longitudinal mode with a first external evanescent field;
providing a recursive path in an optical fiber having a propagation direction circumferential to a longitudinal axis and having a single guided circumferential mode with a second external evanescent field; and
orthogonally coupling the first and second evanescent fields.
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Specification