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Variable linewidth high-power TEA CO2 laser.

F J Duarte1

  • 1University of Alabama, Department of Physics & Astronomy, P.O. Box 1921, University, Alabama 35486, USA.

Applied Optics
|January 1, 1985
PubMed
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This study presents a high-power transversely excited atmospheric (TEA) CO2 laser with adjustable linewidths. The laser achieves narrow linewidths and tunable output energy, offering potential for higher-power applications.

Area of Science:

  • Optics and Photonics
  • Laser Physics

Background:

  • High-power lasers are crucial for various scientific and industrial applications.
  • Controlling laser linewidth is essential for applications requiring precise frequency selection.

Purpose of the Study:

  • To describe a variable linewidth, high-power transversely excited atmospheric (TEA) carbon dioxide (CO2) laser.
  • To demonstrate a method for tuning laser linewidth and output energy.

Main Methods:

  • Utilized a multiple-prism beam expander and a Littrow-mounted grating for frequency selectivity.
  • Employed Zinc Selenide (ZnSe) prisms for continuous linewidth variation.

Main Results:

  • Achieved linewidths of approximately 250 MHz (full width at half maximum) with output energy exceeding 250 mJ at the P20 line (lambda = 10.59 microm).

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  • Demonstrated continuous tuning of laser linewidth from 250 to 650 MHz, with corresponding output energy changes from 250 to 400 mJ.

    • Conclusions:

    • The developed frequency selectivity method using ZnSe prisms is effective for linewidth control in high-power TEA CO2 lasers.
    • This technique is applicable to significantly higher-power CO2 laser systems.