Optical fibers with tubular optical cores
AssigneeAlcatel Lucent
InventorsPeter J. Winzer, Christopher Richard Doerr
Life of this patent
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Abstract
An embodiment of an apparatus includes an optical fiber for which a complete orthogonal basis of propagating modes at an optical telecommunication frequency includes ones of the propagating modes with different angular momenta. The optical fiber has a tubular optical core and an outer optical cladding in contact with and surrounding the tubular optical core. The tubular optical core has a larger refractive index than the optical cladding. The tubular optical core is configured such that those of the propagating modes whose angular momenta have the lowest magnitude for the propagating modes have substantially the same radial intensity profile.
Claims22
An apparatus, comprising:
- an optical fiber having a tubular optical core for which a complete orthogonal basis of propagating modes at an optical telecommunication frequency includes ones of the propagating modes with different angular momenta, the optical fiber having an outer optical cladding in contact with and surrounding the tubular optical core, the tubular optical core having a larger refractive index than the optical cladding;
- and
- wherein the tubular optical core is configured such that those of the propagating modes with angular momenta of the lowest magnitude have a single group velocity, those of the propagating modes with angular momenta of the second lowest magnitude have a single group velocity, and those of the propagating modes with angular momenta of the third lowest magnitude have a single group velocity.
An apparatus, comprising:
- an optical fiber having a tubular optical core and for which a complete orthogonal basis of propagating modes around the core at an optical telecommunication frequency includes ones of the propagating modes with different angular momenta, the optical fiber having an outer optical cladding in contact with and surrounding the tubular optical core, the tubular optical core having a larger refractive index than the optical cladding;
- and
- wherein the tubular optical core is configured such that those of the propagating modes whose angular momenta have the lowest magnitude for the propagating modes have substantially the same radial intensity profile.
An apparatus, comprising:
- a multi-mode optical fiber having a tubular optical core and an outer optical cladding in contact with and surrounding the tubular optical core, the tubular optical core having a larger refractive index than the optical cladding;
- and
- wherein the tubular core has an average refractive index nc and the refractive index of the optical cladding has a value nOC;
- and
- wherein a value of the outer radius of the tubular optical core minus the inner radius of the tubular optical core is less than a wavelength in the optical fiber telecommunication L-band over [2([nc]2−[nOC]2)1/2].
Dependencies are inferred from the claim text.