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US 2011/0085802 A1Published application
Polarization-multiplexed optical transmission
OwnerPietro Bernasconiinventor
Life of this patent
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Abstract
In optical signal transmission, multiple sets of optical signals which contain data and are associated with at least two polarization states are multiplexed using a single arrayed waveguide grating (AWG). The resulting multiplexed signals are then polarization-multiplexed for transmission. In one embodiment, the AWG is provisioned in a unidirectional mode to multiplex the multiple sets of optical signals. In another embodiment, the AWG is provisioned in a bidirectional mode to multiplex the multiple sets of optical signals.
Claims20
An optical transmission system, comprising:
- a plurality of elements for modulating at least first set and second set of optical signals with data, the optical signals in the first set being associated with a first polarization state, and the optical signals in the second set being associated with a second polarization state;
- a single passive optical device for multiplexing the modulated optical signals in the first set to form a first multiplexed signal, and for multiplexing the modulated optical signals in the second set to form a second multiplexed signal;
- and
- an optical processing unit for transforming the first multiplexed signal to be in the first polarization state, and for transforming the second multiplexed signal to be in the second polarization state, the first and second transformed multiplexed signals being combined to form a combined signal for transmission.
1 more element
An optical transmission system, comprising:
- a passive optical device having first and second sides thereof for receiving at least first and second sets of optical signals, respectively, the first and second sets of optical signals containing data, the optical signals in the first set converging onto a first output on the second side of the device, thereby providing a first multiplexed signal at the first output, and the optical signals in the second set converging onto a second output on the first side of the device, thereby forming a second multiplexed signal at the second output;
- and
- an optical processor for transforming the first and second multiplexed signals to be in first and second polarization states, respectively, the respective transformed signals being combined to form a combined signal for transmission.
An optical transmission system, comprising:
- a passive optical device having a first set of input ports for receiving a first set of optical signals containing data, respectively, the optical signals in the first set being associated with a first polarization state, the first set of input ports being disposed on a first side of the device and being optically coupled to a first output port disposed on a second side of the device, thereby multiplexing the optical signals in the first set to provide a first multiplexed signal at the first output port, the passive optical device also having a second set of input ports for receiving a second set of optical signals containing data, the signals in the second set being associated with a second polarization state, the second set of input ports being disposed on the second side of the device and being optically coupled to a second output port disposed on the first side of the device, thereby multiplexing the optical signals in the second set to provide a second multiplexed signal at the second output port;
- and
- an optical processor for transforming the first multiplexed signal to be in the first polarization state, and the second multiplexed signal to be in the second polarization state, the first and second transformed signals being combined to form a combined signal for transmission.
Dependencies are inferred from the claim text.