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Published on: May 12, 2020

Polymer multimode waveguide bend based on a multilayered Eaton lens.

S Hadi Badri, H Rasooli Saghai, Hadi Soofi

|September 11, 2019

Summary

This summary is machine-generated.

This study presents a compact polymeric multimode waveguide bend using a truncated Eaton lens. The innovative design achieves low bend losses for TM modes, crucial for miniaturizing integrated optical devices.

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Area of Science:

Photonics
Materials Science
Optical Engineering

Background:

Reducing the size of integrated optical components requires smaller bending radii in waveguides.
Low-index-contrast waveguides present challenges in achieving tight bends without significant signal loss.

Purpose of the Study:

To design and implement a compact waveguide bend with a reduced bending radius.
To improve the performance and reduce the footprint of polymeric multimode waveguide bends.

Main Methods:

Utilizing an Eaton lens design for the waveguide bend.
Employing ray-tracing calculations to truncate the Eaton lens for optimized performance.
Implementing a concentric cylindrical multilayer structure for the waveguide bend.

Main Results:

A waveguide bend with an 18.4 μm radius was successfully designed and implemented.
Achieved average bend losses of 0.69 dB for TM₀ and 0.87 dB for TM₁ modes in the C-band.
Demonstrated bend loss below 1 dB across a broad bandwidth (1520-1675 nm) for both modes.

Conclusions:

The truncated Eaton lens effectively reduces the bending radius and footprint of polymeric multimode waveguides.
The designed waveguide bend offers low-loss performance, suitable for compact integrated optical circuits.
This approach is vital for advancing miniaturization in photonic integrated circuits.