Dual rail compensation in phase encoded communication
AssigneeNokia Technologies Oy
InventorDavid BITAULD
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Abstract
According to an example aspect of the present invention, there is provided an apparatus comprising a phase modulator configured to modify a phase of light incoming into the phase modulator, to generate phase-encoded light, a dual rail encoder configured to modify the phase-encoded light in dependence of a control signal, to thereby impart a polarization rotation compensation into the phase-encoded light, and a polarization rotator combiner coupled to the dual rail encoder, configured to convert dual rail light from the dual rail encoder into polarization encoded light, wherein the apparatus is arranged to transmit the polarization encoded light.
Claims21
1-31. (canceled)
An apparatus comprising:
- a phase modulator configured to modify a phase of light incoming into the phase modulator, to generate phase-encoded light;
- a dual rail encoder configured to modify the phase-encoded light in dependence of a control signal, to thereby impart a polarization rotation compensation into the phase-encoded light, and
- a polarization rotator combiner coupled to the dual rail encoder, configured to convert dual rail light from the dual rail encoder into polarization encoded light, wherein the apparatus is arranged to transmit the polarization encoded light.
An apparatus, comprising:
- a polarization splitter rotator configured to convert polarization encoded light incoming into the apparatus into dual rail light, and
- an optical receiver configured to receive the dual rail light, at least in part, and to determine a bit sequence phase encoded into the dual rail light, wherein the apparatus is configured to generate feedback data relating to polarization rotation based on the dual rail light.
A method comprising:
- modifying a phase of light in a phase modulator, to generate phase-encoded light;
- modifying, in dual rail form, the phase-encoded light in dependence of a control signal, to thereby impart a polarization rotation compensation into the phase-encoded light;
- converting the dual rail light into polarization encoded light, and
- transmitting the polarization encoded light.
A method, comprising:
- converting polarization encoded light incoming into an apparatus into dual rail light;
- receiving the dual rail light, at least in part, and determining a bit sequence phase encoded into the dual rail light, and
- generating feedback data relating to polarization rotation based on the dual rail light.
A non-transitory computer readable medium having stored thereon a set of computer readable instructions that, when executed by at least one processor, cause an apparatus to at least:
- modify a phase of light in a phase modulator, to generate phase-encoded light;
- modify the phase-encoded light in dependence of a control signal, to thereby impart a polarization rotation compensation into the phase-encoded light and to obtain dual rail light from the phase-encoded light;
- convert the dual rail light into polarization encoded light, and
- transmit the polarization encoded light.
Dependencies are inferred from the claim text.