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Related Experiment Video

Updated: Jun 21, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Phase-controlled integrated photonic quantum circuits.

Brian J Smith¹, Dmytro Kundys, Nicholas Thomas-Peter

¹Centre for Quantum Technologies, National University of Singapore, Singapore. b.smith1@physics.ox.ac.uk

|August 6, 2009

Summary

This summary is machine-generated.

Researchers demonstrate a controllable photonic quantum circuit using UV-written waveguides. This integrated optical circuit shows non-classical interference of photon pairs in a Mach-Zehnder interferometer, a key step for scalable quantum technologies.

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Area of Science:

Quantum optics
Integrated photonics
Waveguide technology

Background:

Scalable photonic quantum technologies rely on complex nested interferometer architectures.
Realizing these architectures requires stable, controllable, and repeatable integrated optical structures.

Purpose of the Study:

To demonstrate a proof-of-principle for an externally controlled photonic quantum circuit.
To showcase the viability of UV-written waveguide technology for quantum applications.

Main Methods:

Fabrication of an integrated optical circuit using UV-written waveguide technology.
Construction of a Mach-Zehnder interferometer with X couplers.
Incorporation of a thermo-optic phase shifter for external control.

Main Results:

Demonstration of non-classical interference of photon pairs.
Successful operation of an externally controlled photonic quantum circuit.
Validation of UV-written waveguides for integrated quantum optics.

Conclusions:

UV-written waveguide technology is suitable for creating stable and controllable integrated photonic quantum circuits.
This work represents a significant step towards building scalable photonic quantum technologies.
The demonstrated Mach-Zehnder interferometer provides a foundational element for future quantum information processing.