Optic multiplexer or demultiplexer
AssigneeCisco Technology, Inc.
InventorRoman BRUCK
Life of this patent
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Abstract
Certain embodiments of the present disclosure are directed towards an optical assembly such as a multiplexers/demultiplexers (MDM). One example optical assembly generally includes: a fiber array configured to provide an optical signal with a plurality of wavelengths; optical wavelength filters configured to separate the plurality of wavelengths into respective optical signals; a lens array configured to receive the respective optical signals from the optical wavelength filters and focus the respective optical signals before reaching an optical interface for a photonic chip; and a birefringent crystal disposed between the lens array and the optical interface.
Claims20
An optical assembly comprising:
- a lens array configured to receive one or more optical signals and to focus the one or more optical signals toward an optical interface;
- and
- a birefringent crystal disposed between the lens array and the optical interface and positioned within a converging region of the one or more optical signals,
- wherein the birefringent crystal is configured to provide, for each of the one or more optical signals, polarization components of different polarizations at the optical interface with a lateral offset that is smaller than a pitch of lenses in the lens array.
An optical system comprising:
- an optical element configured to direct an optical beam toward an optical interface;
- and
- a birefringent crystal disposed in a focused or converging portion of the optical beam between the optical element and the optical interface,
- wherein the birefringent crystal separates the optical beam into polarization components having a lateral separation at the optical interface that is less than a characteristic spacing associated with the optical element.
An optical apparatus comprising:
- a birefringent crystal positioned in a region of a converging or diverging optical beam proximate an optical interface,
- wherein the birefringent crystal is configured to generate first and second polarization components of an optical beam having a lateral separation at the optical interface that is smaller than a lateral extent of the optical beam incident on the birefringent crystal.
Dependencies are inferred from the claim text.