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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Compact spatial multiplexers for mode division multiplexing.

Haoshuo Chen, Roy van Uden, Chigo Okonkwo

|January 22, 2015

Summary

This summary is machine-generated.

Compact spatial multiplexers (SMUX) for mode division multiplexing (MDM) were implemented using three distinct approaches. These compact SMUX designs minimize loss and enable mass production for reliable optical communication systems.

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Published on: September 25, 2020

Area of Science:

Optical Engineering
Photonics
Integrated Optics

Background:

Mode division multiplexing (MDM) requires efficient spatial multiplexers (SMUX) to manage multiple light modes.
Existing SMUX solutions face challenges with mode-dependent loss (MDL) and coupler insertion loss (CIL).
Compact and mass-producible SMUX designs are crucial for practical MDM systems.

Purpose of the Study:

To implement and evaluate three compact SMUX solutions for MDM.
To minimize MDL and CIL in SMUX devices.
To demonstrate manufacturability and reliability for mass production.

Main Methods:

Implementation of mode-selective excitation (push-pull, center launch) on Silicon-on-insulator (SOI) and Indium Phosphide (InP) platforms.
Exploration of 2D top-coupling using vertical emitters (grating couplers on SOI, 45° mirrors on InP).
Realization of a 3-spot SMUX on InP and a 6-mode SMUX using laser-inscribed 3D waveguide (3DW) technology.

Main Results:

Demonstrated selective excitation of LP01 and LP11 modes on SOI and InP.
Successfully implemented 3-spot SMUX and a fully-packaged 6-mode SMUX using 3DW technology.
Achieved compact footprints and explored mass-producible designs.

Conclusions:

Compact SMUX implementations using diverse photonic integration platforms are feasible.
The developed SMUX solutions offer potential for reduced loss and enhanced reliability.
3DW technology presents a promising avenue for advanced, packaged multi-mode optical devices.