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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Ultra-compact waveguide crossing for a mode-division multiplexing optical network.

Chunlei Sun, Yu Yu, Xinliang Zhang

|December 8, 2017

Summary

This summary is machine-generated.

We developed a compact waveguide crossing capable of processing two modes simultaneously. This device features a symmetric Y-junction for efficient mode splitting and achieves low insertion loss and crosstalk for integrated photonic circuits.

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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Area of Science:

Photonics
Integrated Optics
Waveguide Devices

Background:

Multimode waveguides are crucial for advanced photonic integrated circuits.
Efficiently processing multiple modes within a compact footprint remains a significant challenge.

Purpose of the Study:

To propose and experimentally demonstrate an ultra-compact multimode waveguide crossing.
To enable simultaneous processing of two modes with minimal loss and crosstalk.

Main Methods:

Utilizing a symmetric Y-junction to split high-order modes into fundamental ones.
Fabricating and characterizing an ultra-compact waveguide crossing with a footprint of 21 μm × 21 μm.

Main Results:

Achieved simultaneous processing of TE0 and TE1 modes.
Measured insertion loss of ~1.82 dB for TE0 and ~0.46 dB for TE1 at 1550 nm.
Demonstrated crosstalk below -18 dB across a wavelength range of 1510–1600 nm.

Conclusions:

The proposed waveguide crossing offers a highly compact and efficient solution for multimode signal processing.
This technology has potential applications in advanced optical communication and computing systems.