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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

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Published on: August 6, 2018

Picosecond pulse amplification in isotopic CO2 active medium.

Mikhail N Polyanskiy¹, Igor V Pogorelsky, Vitaly Yakimenko

¹Brookhaven National Laboratory, Bldg. 820M, Upton, NY 11973, USA. polyanskiy@bnl.gov

|April 20, 2011

Summary

Researchers developed a high-pressure carbon dioxide (CO(2)) laser amplifier using oxygen-18. This innovation produced a 1 TW peak power pulse without spectral splitting, overcoming a common limitation in CO(2) laser amplification.

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Area of Science:

Laser physics
Quantum optics
Isotope enrichment

Background:

Carbon dioxide (CO(2)) lasers are crucial for various scientific applications.
Spectral modulation due to rotational structure limits peak power in CO(2) laser amplifiers.
Isotopic enrichment is a potential method to alter laser properties.

Purpose of the Study:

To investigate the effect of oxygen-18 enrichment on a high-pressure CO(2) laser amplifier.
To achieve high peak power pulses without spectral splitting.
To overcome limitations imposed by the CO(2) amplification band's rotational structure.

Main Methods:

Utilized a high-pressure carbon dioxide laser amplifier.
Enriched the amplifier medium with the oxygen-18 isotope.
Characterized the output pulse properties, including duration, wavelength, and peak power.

Main Results:

Successfully produced a 5-picosecond (ps) pulse at a 10-micrometer (µm) wavelength.
Achieved a peak power of 1 terawatt (TW).
Demonstrated pulse generation without the typical spectral splitting caused by rotational modulation.

Conclusions:

Oxygen-18 enrichment in CO(2) laser amplifiers can mitigate spectral modulation.
This technique enables the generation of high-energy, high-power laser pulses.
Opens new possibilities for advanced laser applications requiring high peak power.