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Updated: May 27, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Optimizing intracavity high harmonic generation for XUV fs frequency combs.

Jane Lee¹, David R Carlson, R Jason Jones

¹College of Optical Science, University of Arizona, 1630 E University Blvd., Tucson, AZ 85721, USA.

|November 24, 2011

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Researchers developed a powerful extreme ultraviolet (XUV) frequency comb using high harmonic generation, achieving record power levels. This breakthrough enables new possibilities for precision spectroscopy and advanced measurements in the XUV region.

Area of Science:

Quantum optics
Nonlinear optics
Atomic and molecular physics

Background:

Ultrashort pulse frequency combs can be up-converted to the extreme ultraviolet (XUV) spectral region via high harmonic generation (HHG).
This method offers a coherent light source for spectroscopy but has been limited by low achieved powers and challenges in probing electronic transitions.
Previous efforts utilized passive enhancement cavities for XUV generation, but power limitations hindered widespread application.

Purpose of the Study:

To dramatically improve the power output of an XUV frequency comb source.
To enable new spectroscopic techniques, such as dual-comb spectroscopy, in the XUV region.
To investigate phase-matching and ionization dynamics in intracavity HHG.

Main Methods:

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Last Updated: May 27, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Development of an enhanced passive enhancement cavity for ultrashort pulses.

Intracavity high harmonic generation (HHG) for up-conversion of a frequency comb into the XUV.

Numerical simulations to analyze phase-matching, cavity design, and ionization dynamics.

Measurement of XUV power levels across various harmonic orders.

Main Results:

Achieved record power levels for an XUV frequency comb in the 50-150 nm range.
Measured up to 77 μW at the 11th harmonic (72 nm) and μW levels down to the 15th harmonic (53 nm).
Demonstrated that current power levels permit dual-comb spectroscopy in the XUV for the first time.

Conclusions:

The developed XUV frequency comb offers unprecedented power, overcoming previous limitations.
The high power levels open the door for advanced applications like XUV dual-comb spectroscopy.
This technology promises to significantly advance the study of atomic and molecular spectra with high precision.