Characterization of a subpicosecond XeF (C->A) excimer laser

Thomas Hofmann; Tracy S. Sharp; C. Brent Dane; P. Jeffrey Wisoff; William L. Wilson Jr.; Frank K. Tittel; Gabor Szabo

doi:10.1117/12.43638

1 May 1991 Characterization of a subpicosecond XeF (C->A) excimer laser

Thomas Hofmann, Tracy S. Sharp, C. Brent Dane, P. Jeffrey Wisoff, William L. Wilson Jr., Frank K. Tittel, Gabor Szabo

Proceedings Volume 1412, Gas and Metal Vapor Lasers and Applications; (1991) https://doi.org/10.1117/12.43638
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

The electron-beam pumped XeF(C yields A) excimer has been investigated as a novel gain medium for ultrashort pulse, high power amplification in the visible spectral region over a wide range of laser pulse durations. Gain measurements for 100 ps and 800 fs pulses resulted in a small signal gain coefficient of 3%/cm and a saturation energy density of 80 mJ/cm². For 250 fs pulses, a saturation energy density of 50 mJ/cm² was observed. Narrowband absorbers in the XeF(C yields A) spectrum could be bleached out, yielding a smooth gain profile of 60 nm bandwidth. An unstable resonator was designed with particular consideration of the small XeF(C yields A) gain coefficient and optimized energy extraction in a single pulse output. A maximum pulse energy of 275 mJ was obtained by amplification of 250 fs pulses at 490 nm wavelength, generating laser powers in the terawatt range. The beam quality of the amplified pulses was within 1.3 times the diffraction limit, making possible focused intensities in the 10¹⁸ W/cm² range.

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Thomas Hofmann, Tracy S. Sharp, C. Brent Dane, P. Jeffrey Wisoff, William L. Wilson Jr., Frank K. Tittel, and Gabor Szabo "Characterization of a subpicosecond XeF (C->A) excimer laser", Proc. SPIE 1412, Gas and Metal Vapor Lasers and Applications, (1 May 1991); https://doi.org/10.1117/12.43638

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KEYWORDS

Excimers

Picosecond phenomena

Resonators

Amplifiers

Excimer lasers

Optical amplifiers

Dye lasers

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