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US 9,312,981 B2Granted
Distributed spatial mode processing for spatial-mode multiplexed communication systems
AssigneeAT&T Intellectual Property I, L.P.
InventorsXiang Zhou, Peter David Magill, Lynn Nelson
Life of this patent
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Abstract
A method and system for distributed spatial mode processing is disclosed where a plurality of optical signals is received via a plurality of spatial modes on a first optical link, spatial mode conversion is performed on the plurality of optical signals to switch the plurality of optical signals to different ones of the plurality of spatial modes and the plurality of optical signals is transmitted via the different ones of the plurality of spatial modes on a second optical link where spatial mode filtering may occur.
Claims20
A method, comprising:
- receiving a plurality of optical signals over an optical link, each optical signal received via a respective one of a plurality of spatial modes of the optical link, the optical link including a particular spatial mode not used for the receiving;
- switching each optical signal received from its respective one of the plurality of spatial modes to a respective different one of the plurality of spatial modes via the particular spatial mode;
- transmitting each optical signal via its respective different one of the plurality of spatial modes;
- and
- filtering the particular spatial mode to reduce a crosstalk signal on the particular spatial mode resulting from the switching.
2 more elements
A system, comprising:
- an optical link including a plurality of spatial modes and a particular spatial mode;
- a spatial mode converter configured to:
- receive a plurality of optical signals over the optical link, each optical signal received via a respective one of the plurality of spatial modes,
- switch each optical signal received from its respective one of the plurality of spatial modes to a respective different one of the plurality of spatial modes via the particular spatial mode, wherein the particular spatial mode is not used to receive the plurality of optical signals, and
- transmit each optical signal via its respective different one of the plurality of spatial modes;
- and
- a filter configured to filter the particular spatial mode to reduce a crosstalk signal on the particular spatial mode resulting from the switching.
4 more elements
A method, comprising:
- receiving a plurality of optical signals over an optical link, each optical signal received via a respective one of a plurality of spatial modes of the optical link, the optical link including a particular spatial mode not used for the receiving;
- transmitting each optical signal via a respective different one of the plurality of spatial modes;
- and
- filtering the particular spatial mode to reduce a crosstalk signal on the particular spatial mode, the crosstalk signal resulting from switching each optical signal received from its respective one of the plurality of spatial modes to its respective different one of the plurality of spatial modes via the particular spatial mode.
1 more element
Dependencies are inferred from the claim text.