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US 11,108,469 B2Granted
Mode demultiplexing hybrid apparatus, methods, and applications
AssigneeUniversity of Central Florida Research Foundation, Inc.
InventorsGuifang Li, He Wen
Life of this patent
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Abstract
A mode demultiplexing hybrid (MDH) that integrates mode demultiplexing, local oscillator power splitting, and optical 90-degree hybrid using multi-plane light conversion (MPLC). Reflective cavity and transmissive systems are disclosed. The MDH may fine advantageous application as the optical front end for a coherent receiver in a space-division multiplexing (SDM) system.
Claims6
A mode demultiplexing hybrid (MDH) apparatus, comprising:
- an entrance plane adapted to receive inputs including a mode-multiplexed signal having M greater than 1 number of spatial modes and a single-mode reference, wherein the signal and reference inputs are spatially separated, occupy non-overlapped areas, and can coherently interfere;
- a multi-plane light converter (MPLC) having an input optically coupled to the signal and reference inputs, and a series of phase plates separated by free space propagation paths;
- and
- an exit plane optically coupled to an output of the MPLC, wherein exit plane of the MDH contains spatially non-overlapping interferences between every mode of the input signal and a common reference with 0, 90, 180, and 270 degree relative phase shifts.
1 more element
Dependencies are inferred from the claim text.