Colorado State University Research Foundation

University of Colorado

Brendan A Reagan

Jorge J Rocca

Henry C Kapteyn

David M Gaudiosi

Tenio V Popmintchev

Margaret M Mumane

Michael E Grisham

Keith A Wernsing

Alden H Curtis

Federico J Furch

A cryogenic cooling apparatus for high average power laser oscillator or amplifier, wherein the oscillator or amplifier material is in direct contact with a flowing cryogenic liquid cooled to below its boiling point is described. This method of cooling overcomes the limit in heat flux due to the onset of film boiling, thereby allowing for increased laser average power.

Cooling system for high average power laser

A pre-ionized medium created by a capillary discharge results in more efficient use of laser energy in high-order harmonic generation (HHG) from ions. It extends the cutoff photon energy, and reduces the distortion of the laser pulse as it propagates down the waveguide. The observed enhancements result from a combination of reduced ionization energy loss and reduced ionization-induced defocusing of the driving laser as well as waveguiding of the driving laser pulse. The discharge plasma also provides a means to spectrally tune the harmonics by tailoring the initial level of ionization of the medium.

High-order harmonic generation in a capillary discharge

Growing community of inventors

Fort Collins, CO, United States of America

Brendan A Reagan