• Generation of 13.9 𝜇m radiation from CO2 by cascade lasing or externally applied CO2 laser

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/075/05/0895-0899

    • Keywords

       

      CO2 laser; Q-switching; generation of 14 𝜇m radiation from CO2; cascade lasing; E-beam-controlled discharge.

    • Abstract

       

      13.9 𝜇m radiation from the $10^{0}0–01^{1}0$ transition can be obtained from a CO2 laser by saturating the 00$^{0}1–10^{0}0$, 10.6 𝜇m transition with an internally generated q-switched pulse or by the application of an external 10.6 𝜇m pulse. Because of Fermi resonance between the symmetric stretch and the bending modes, decay of population from the $10^{0}0$ level is fast, and such lasers operate at low power and energies. A theoretical model was developed to study such lasers. The results of the calculations indicate that a large-aperture E-beam-sustained discharge is effective for excitation of the cryogenically cooled gain medium, which uses He rich mixture at low pressure. The system is scalable and capable of generating large powers and energies.

    • Author Affiliations

       

      Utpal Nundy1

      1. BH-2-76, Kendriya Vihar, Kharghar, Sector-11, Navi Mumbai 410 210, India
    • Dates

       
  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.