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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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On-Chip Strong Coupling and Efficient Frequency Conversion between Telecom and Visible Optical Modes.

Xiang Guo¹, Chang-Ling Zou¹, Hojoong Jung¹

¹Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA.

Physical Review Letters

|October 1, 2016

Summary

This summary is machine-generated.

Researchers achieved strong coupling between telecom and visible light modes on an aluminum nitride chip. This enables efficient, wideband, bidirectional frequency conversion for optical communication applications.

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Area of Science:

Photonics
Quantum Optics
Materials Science

Background:

Frequency conversion of photons is crucial for optical signal processing.
Strong coupling between optical modes of different colors has been a significant challenge.
Aluminum nitride (AlN) is a promising material for integrated photonic devices.

Purpose of the Study:

To experimentally demonstrate strong coupling between telecom (1550 nm) and visible (775 nm) optical modes.
To achieve nonreciprocal normal-mode splitting via coherent interference.
To demonstrate wideband, bidirectional frequency conversion on a photonic chip.

Main Methods:

Fabrication of an aluminum nitride photonic chip.
Experimental setup to couple telecom and visible optical modes.
Characterization of optical mode splitting and frequency conversion efficiency.

Main Results:

Successful demonstration of strong coupling between 1550 nm and 775 nm optical modes.
Observation of nonreciprocal normal-mode splitting due to coherent interference.
Achieved wideband (1.2 GHz) bidirectional frequency conversion with 0.14 on-chip efficiency.

Conclusions:

This work presents the first experimental realization of strong coupling between optical modes of different colors.
The demonstrated nonreciprocal coupling and frequency conversion pave the way for advanced photonic devices.
Aluminum nitride photonics offers a robust platform for efficient optical signal manipulation.