Form polarizing fibers and method of fabrication
First Claim
1. A polarizing fiber optic waveguide, comprising:
- a core formed of a plurality of alternating dielectric layers, each layer having a characteristic refractive index, said core being formed such that the dielectric layers provide a first core refractive index for light of a first polarization and a second core refractive index for light of a second polarization; and
a cladding surrounding said core, said cladding being formed of a dielectric material having a refractive index at least as large as said first core refractive index and less than said second core refractive index such that said core guides only light of said second polarization and light of all other polarizations propagate from said core into said cladding.
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Abstract
A polarizing optical fiber has a core formed of a plurality of layers of dielectrics having different refractive indices. The dielectric layers form a composite structure having different refractive indices for light of different polarizations. The differing refractive indices cause the polarization states of light guided by the fiber to be non-degenerate so that energy ordinarily will not couple from one polarization to the other. The fiber includes a cladding that may have a refractive index either less than both core indices to provide a polarization maintaining fiber or greater than or equal to one of the core indices to provide a polarizing fiber. The method of fabrication of the layered core form birefringent optical fiber includes forming a structure of a plurality of layers of the dielectrics, heating the structure to form a monolith, stretching the monolith to form the fiber core, and adding the cladding to the core.
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Citations
14 Claims
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1. A polarizing fiber optic waveguide, comprising:
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a core formed of a plurality of alternating dielectric layers, each layer having a characteristic refractive index, said core being formed such that the dielectric layers provide a first core refractive index for light of a first polarization and a second core refractive index for light of a second polarization; and a cladding surrounding said core, said cladding being formed of a dielectric material having a refractive index at least as large as said first core refractive index and less than said second core refractive index such that said core guides only light of said second polarization and light of all other polarizations propagate from said core into said cladding. - View Dependent Claims (2, 3)
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4. A method for forming a polarizing fiber optic waveguide, comprising the steps of:
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forming a core of a plurality of alternating dielectric layers, each layer having a characteristic refractive index, the alternating dielectric layers providing a first core refractive index for light of a first polarization and a second core refractive index for light of a second polarization; and surrounding the core with a cladding formed of a dielectric material having a refractive index at least as large as the first core refractive index and less than the second core refractive index such that the core guides only light of said second polarization and light of all other polarizations propagate from the core into the cladding. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification