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Related Experiment Video

Updated: Mar 2, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Integrated tunable green light source on silicon nitride.

Gang Wang¹, Ozan Yakar¹, Xinru Ji²

¹École Polytechnique Fédérale de Lausanne, Photonic Systems Laboratory (PHOSL), Lausanne, Switzerland.

Light, Science & Applications

|March 1, 2026

Summary

This summary is machine-generated.

Researchers developed on-chip green light sources using silicon nitride microresonators. This breakthrough offers high power and tunability for telecommunications and quantum applications.

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Area of Science:

Photonics and Optical Engineering
Materials Science
Quantum Technologies

Background:

On-chip green light sources are crucial for telecommunications and quantum applications.
Current integrated green light generators face limitations in power output and tunability.

Purpose of the Study:

To demonstrate efficient and tunable on-chip green light generation using silicon nitride microresonators.
To explore photo-induced nonlinearities for enhanced light source performance.

Main Methods:

Utilizing silicon nitride microresonators to achieve second-harmonic generation (SHG).
Employing photo-induced second-order nonlinearities for light generation.
Implementing all-optical poling (AOP) with a milliwatt-level threshold.
Demonstrating non-cascaded sum-frequency generation (SFG) assisted by coherent frequency combs.

Main Results:

Achieved up to 3.5 mW of green power via SHG.
Demonstrated densely tunable green light generation over a 29 nm range.
Reported milliwatt-level AOP threshold enabling amplifier-free continuous-wave AOP.
Showcased comb-assisted AOP for switching green light generation over an 11 nm range.

Conclusions:

The developed silicon nitride microresonators provide a low-threshold, high-power, and widely-tunable on-chip green light source.
The combination of efficient photo-induced nonlinearity and multi-wavelength AOP overcomes previous performance limitations.
This technology is promising for advancing integrated photonics for telecommunications and quantum applications.