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US 2018/0003897 A1Published application
Optimized 2x2 3db multi-mode interference coupler
AssigneeElenion Technologies, LLC
InventorYangjin MA
Life of this patent
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Abstract
An optimized SOI 2×2 multimode interference (MMI) coupler is designed by use of the particle swarm optimization (PSO) algorithm. Finite Difference Time Domain (FDTD) simulation shows that, within a footprint of 9.4×1.6 μm2, <0.1 dB power unbalance and <1 degree phase error are achieved across the entire C-band. The excess loss of the device is <0.2 dB.
Claims21
1-11. (canceled)
An optical coupler, comprising:
- a multi-mode region including:
- a length L between a first end and a second end;
- and a plurality of segments having widths, at least five of said segment widths from the first end to the second end being different one from the other;
- a plurality of first ports at the first end of the multi-mode region;
- and
- a plurality of second ports at the second end of the multi-mode region.
3 more elements
A method of manufacturing an optical coupler, comprising:
- a multi-mode region including:
- a length L between a first end and a second end;
- and a plurality of segments having widths, at least five of said segment widths from the first end to the second end being different one from the other;
- a plurality of first ports at the first end of the multi-mode region;
- and
- a plurality of second ports at the second end of the multi-mode region;
- said method comprising:
- determining each width for the plurality of segments for a predefined set of design parameters, using a computerized optimization algorithm;
- and
- fabricating the optical coupler with the widths.
7 more elements
Dependencies are inferred from the claim text.