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Related Experiment Video

Updated: May 29, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

A quantum pulse gate based on spectrally engineered sum frequency generation.

Andreas Eckstein¹, Benjamin Brecht, Christine Silberhorn

¹1Max Planck Institute for the Science of Light, Günther-Scharowsky-Strasse 1, 91054 Erlangen, Germany. andreas.eckstein@mpl.mpg.de

|September 22, 2011

Summary

This summary is machine-generated.

We introduce the quantum pulse gate (QPG) to access ultrafast quantum light modes for quantum information processing. This method uses engineered sum frequency generation to selectively extract broadband spectral modes with high fidelity.

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Area of Science:

Quantum Optics
Quantum Information Science

Background:

Ultrafast quantum states of light possess intrinsic broadband spectral mode structures.
Harnessing these complex modes is crucial for advancing quantum information processing.

Purpose of the Study:

To introduce a novel method, the quantum pulse gate (QPG), for accessing and manipulating these spectral modes.
To enable the use of broadband spectral modes in quantum information applications.

Main Methods:

Proposed implementation of the QPG using a periodically poled lithium niobate (PPLN) waveguide.
Utilized spectrally engineered sum frequency generation (SFG) for mode interconversion.
Employed pulse-shaping of the SFG pump beam to address individual spectral modes.

Main Results:

Demonstrated the ability to pick well-defined spectral broadband modes from ultrafast multi-mode states.
Achieved interconversion to a broadband mode at a different frequency.
Showcased individual addressing and high-fidelity extraction of orthogonal broadband modes.

Conclusions:

The quantum pulse gate provides a viable method for controlling and utilizing spectral modes of quantum light.
This technique opens new avenues for quantum information processing by leveraging complex light states.