Back to results
US 2020/0403710 A1Published application
Mode demultiplexing hybrid apparatus, methods, and applications
AssigneeUniversity of Central Florida Research Foundation, Inc.
InventorsGuifang Li, He Wen
Life of this patent
Estimating the term…
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.
Claims18
A mode demultiplexing hybrid (MDH) apparatus, comprising:
- an entrance plane adapted to receive inputs including a signal having a specified phase/amplitude profile and a 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
- an exit plane optically coupled to an output of the MPLC, wherein the output of the MPLC comprises a plurality of spatially overlapping signal and reference spots, each spot having a different respective phase shift imposed by the MPLC such that all of the output spots are mutually orthogonal,
- wherein a single MDH enables mode demultiplexing and optical 90-degree mixing of the inputs.
2 more elements
A method for designing a MDH, comprising:
- a) choosing input parameters, including beam sizes, the positions of signals and LO, the size and resolution of an entrance plane;
- b) identifying an output spot array including the arrangement and shape of the output spot array to minimize a number of phase masks;
- c) estimating the number, size, resolution and spacing of the phase masks using iterative performance evaluations;
- d) computing the phase patterns on the phase masks;
- e) evaluating the performance of the MDH from the output spots;
- and
- f) if the performance is satisfactory, then ending;
- or
- g) if the performance is not satisfactory, then iterating N times where Nth is a threshold value,
- where, if N<Nth, then proceed to step (c), or
- if N>Nth, then proceed to step (b).
8 more elements
Dependencies are inferred from the claim text.