Fibre-optic communication based on dual-rail and polarization encoding
AssigneeNokia Technologies Oy
InventorsDavid Bitauld, Hongwei Li, Antti Niskanen
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Abstract
According to an example aspect, there is provided an apparatus comprising a first optical converter coupled to a fibre interface and to two waveguides, a dual rail encoder configured to encode dual rail form light from the two waveguides with payload information, and wherein the dual rail encoder is coupled to the first optical converter or to a second optical converter disposed between the dual rail encoder and the fibre interface, and wherein the first optical converter or the second optical converter is coupled so as to provide polarization encoded light into the fibre interface.
Claims26
1-35. (canceled)
An apparatus comprising:
- a first optical converter arranged to receive polarization encoded light from a fibre interface, to convert the polarization encoded light into dual rail form light and to output the dual rail form light into two waveguides;
- a dual rail encoder configured to encode the dual rail form light from the two waveguides with payload information and to modify the dual rail form light to correct, based on adjustment information concerning a fibre, for polarization rotation caused by the fibre, and
- wherein an output of the dual rail encoder is coupled to the first optical converter or to a second optical converter disposed between the dual rail encoder and the fibre interface, and wherein the first optical converter or the second optical converter is coupled so as to convert the dual rail form light from the dual rail encoder into polarization encoded light and to provide this polarization encoded light into the fibre interface.
An apparatus comprising:
- a fibre interface configured to provide light from a light source to the fibre;
- a detector configured receive light from the fibre interface and to measure at least one quantity of the received light, and
- at least one processing core configured to communicate adjustment information concerning polarization rotation caused by the fibre via an interface distinct from the fibre interface.
A method comprising:
- converting polarization encoded light incoming via a fibre into an apparatus into dual rail form light;
- encoding, with a dual rail encoder, the dual rail form light with payload information and modifying, with the dual rail encoder, the dual rail form light to correct, based on adjustment information concerning the fibre, for polarization rotation caused by the fibre;
- converting the dual rail encoded light to polarization encoded light, and
- providing the polarization encoded light into the fibre.
A method, comprising:
- providing light from a light source to a fibre via a fibre interface;
- receiving light from the fibre interface and measuring at least one quantity of the received light, and
- communicating adjustment information concerning polarization rotation caused by the fibre via an interface distinct from the fibre interface.
Dependencies are inferred from the claim text.