Temperature effects in rf-excited CO2 lasers with unstable resonators

Edward F. Plinski; Jerzy S. Witkowski; Bartosz W. Majewski; Krzysztof M. Abramski

doi:10.1117/12.472931

25 June 2003 Temperature effects in rf-excited CO₂ lasers with unstable resonators

Edward F. Plinski, Jerzy S. Witkowski, Bartosz W. Majewski, Krzysztof M. Abramski

Proceedings Volume 4969, Laser Resonators and Beam Control VI; (2003) https://doi.org/10.1117/12.472931
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States

Abstract

The qualitative and quantitative description of the laser tuning effect during a pulse forming has been described. The mechanism of the line hopping in the CO laser has been presented. A simple arrangement enabled observing the pulse evolution of all oscillating spectral transitions contributing in the total shape of the output pulse. As shown in the experiment, the jumps from line to line over the pulse duration give the sequence of lines, which is the subsequence of the static laser signature. Thus, the changes of the refractive index can be estimated by setting the static signature against the line hopping during the pulse operation of the laser. On the other hand, the changes of the refractive index during the pulse evolution have been measured directly with a Mach-Zehnder interferometer. The experiment has been performed on the slab-waveguide laser with an unstable positive branch optical resonator. The experiment allowed observing the dynamic evolution of the pulse in time and spectrum. The method of the investigations allows estimating the changes of a pressure and temperature during the pulse evolution, and can explain the effect of bulges observed at the output pulse shape.

Citation Download Citation

Edward F. Plinski, Jerzy S. Witkowski, Bartosz W. Majewski, and Krzysztof M. Abramski "Temperature effects in rf-excited CO₂ lasers with unstable resonators", Proc. SPIE 4969, Laser Resonators and Beam Control VI, (25 June 2003); https://doi.org/10.1117/12.472931

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