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US 6,807,350 B2Granted
Optical fiber with a radially varying index of refraction and related methods
AssigneeVerrillon, Inc.
InventorsAbdelouahed Soufiane, Musa Awaleh, John MacDonald, Paula Fournier
Life of this patent
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Abstract
An optical fiber has a core with a diameter dc and a reflective index nc; a primary cladding concentrically surrounding the core and having an outer diameter dpc and a refractive index npc less than the core refractive index nc; and a secondary cladding concentrically surrounding the primary cladding and having an outer diameter dsc and a refractive index nsc less than the primary cladding refractive index npc.
Claims14
An optical fiber comprising:
- a core having a diameter dc and a refractive index nc;
- a primary cladding concentrically surrounding the core and having an outer diameter dpc and a refractive index npc less than the core refractive index nc, wherein the refractive index npc is substantially constant through the primary cladding;
- and
- a secondary cladding concentrically surrounding the primary cladding and having an outer diameter dsc and a refractive index nsc less than the primary cladding refractive index npc, wherein the primary cladding outer diameter dpc is a fraction of the secondary cladding outer diameter dsc, and wherein a difference between the primary cladding refractive index npc and the secondary cladding refractive index nsc is greater than or equal to a constant and less than or equal to the core refractive index nc less the constant.
1 more element
A method of coupling a pair of optical fibers, comprising the steps of:
- providing a pair of fibers, each of the fibers having a longitudinal extent and at least one of the fibers comprising (i) a core having a diameter dc and a refractive index nc;
- (ii) a primary cladding concentrically surrounding the core and having an outer diameter dpc and a refractive index npc less than the core refractive index nc;
- and (iii) a secondary cladding concentrically surrounding the primary cladding and having an outer diameter dsc and a refractive index nsc less than the primary cladding refractive index npc wherein the primary cladding outer diameter dpc is a fraction of the secondary cladding outer diameter dsc, and wherein a difference between the primary cladding refractive index npc and the secondary cladding refractive index nsc is greater than or equal to a constant and less than or equal to the core refractive index nc less the constant;
- and
- fusing the fibers along a portion of their longitudinal extents to couple them.
2 more elements
Dependencies are inferred from the claim text.