Transmission adjustment for space division multiplexing of optical signals
AssigneeHuawei Technologies Co., Ltd.
InventorsMohammad Mehdi Mansouri Rad, Irfan Muhammad Fazal
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Abstract
Spatial division multiplexing (SDM) allows multiple optical signals to be multiplexed onto a single optical link. Performance of SDM systems may be improved by monitoring performance metrics indicative of crosstalk between the spatially multiplexed signals and adjusting at least one transmission characteristic of one or more of the multiplexed signals in order to reduce the impact of the intermodal crosstalk.
Claims24
A method for use in a spatial division multiplexed (SDM) optical network transmitting a plurality of optical signals over an optical link, wherein each one of the plurality of optical signals is transmitted in a respective one of a plurality of spatial modes of the optical link, the method comprising:
- monitoring a transmission performance metric of the optical link, the transmission performance metric indicative of crosstalk between two of the plurality of optical signals transmitted in different ones of the plurality of spatial modes;
- adjusting a transmission characteristic comprising a spectral profile of one of the two optical signals to reduce the crosstalk indicated by the monitored transmission performance metric;
- and
- adjusting at least one intervening optical component of the SDM network in coordination with the adjusted transmission characteristic;
- whereby the one of the two optical signals is properly received in accordance with a reduction in the crosstalk.
A controller in a spatial division multiplexed (SDM) optical network transmitting a plurality of optical signals over an optical link, wherein each one of the plurality of optical signals is transmitted in a respective one of a plurality of spatial modes of the optical link, the controller comprising:
- at least one processing unit for executing instructions;
- and
- at least one memory unit for storing instructions, which when executed by the at least one processing unit configure the controller to:
- monitor a transmission performance metric of the optical link, the transmission performance metric indicative of crosstalk between two of the plurality of optical signals transmitted in different ones of the plurality of spatial modes;
- adjust a transmission characteristic comprising a spectral profile of one of the two optical signals to reduce the crosstalk indicated by the monitored transmission performance metric;
- and
- adjust at least one intervening optical component of the SDM network in coordination with the adjusted transmission characteristic;
- whereby the one of the two optical signals is properly received in accordance with a reduction in the crosstalk.
Dependencies are inferred from the claim text.