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Updated: May 10, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Broadband on-chip optical non-reciprocity using phase modulators.

Christophe Galland¹, Ran Ding, Nicholas C Harris

¹Department of Electrical & Computer Engineering, University of Delaware, Newark, DE 19716, USA. galland@alumni.ethz.ch

|June 22, 2013

Summary

This summary is machine-generated.

Researchers developed a new non-reciprocal photonic circuit for silicon photonics. This broadband device, using time-dependent index modulation, offers a practical solution for optical isolators and circulators in complementary metal-oxide-semiconductor technology.

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Area of Science:

Photonics
Integrated Optics
Materials Science

Background:

Breaking light propagation reciprocity is crucial for optical circuits.
Silicon photonics integrated circuits (PICs) are compatible with complementary metal-oxide-semiconductor (CMOS) technology.
Integrating optical isolators and circulators into CMOS remains a challenge.

Purpose of the Study:

Introduce a novel non-reciprocal photonic circuit.
Provide a practical solution for optical isolation and circulation in silicon PICs.
Enable broadband operation without resonant structures.

Main Methods:

Utilized time-dependent index modulation via conventional phase modulators.
Designed a fully balanced interferometer configuration.
Operates with standard single-mode waveguides and optical fibers.

Main Results:

Achieved an extinction ratio exceeding 20dB.
Demonstrated insertion loss below 3dB.
The design is intrinsically broadband due to the absence of resonant structures.

Conclusions:

The proposed non-reciprocal photonic circuit offers a viable solution for CMOS-compatible optical isolators and circulators.
The broadband and efficient performance makes it suitable for telecommunications and optical computing.
This advancement paves the way for more sophisticated photonic integrated circuits.