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Amplification and saturation in a CO2 waveguide amplifier

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Abstract

An ir CO2, dc current pumped, optical waveguide (WG) amplifier has been built, and its active medium optical parameters measured for several CO2 emission lines, and their dependence from active medium total pressure, discharge current and temperature was investigated.

High gain is found which, coupled with relatively high saturation power in the WG fundamental mode and ease of fabrication with this technology in long (up to 1.5 m) lengths, indicates promising use to efficiently amplify high spectral and spatial purity output of a short, highly tunable WG laser up to power levels suited for nonlinear spectroscopy and optical pumping. The dependence of the small signal gain coefficient and of the saturation parameter for individual rotational lines on the radiation intensity was computed using experimentally known parameters of the discharge plasma. The computation was carried out using the two mode rate equation approach for CO2−N2−He gas mixtures. A satisfactory agreement between theoretical and experimental results was obtained.

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Author notes

  1. V. Panchenko

    Present address: Physics Department, M. N. Lomonosov State University, Moscow, USSR

  2. M. Pellegrino

    Present address: CERN, 23, Genève, Switzerland

Authors and Affiliations

  1. Dipartimento di Fisica della Università di Pisa, P. Torricelli 2, I-56100, Pisa, Italy

    N. Ioli, V. Panchenko, M. Pellegrino & F. Strumia

Authors
  1. N. Ioli
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  2. V. Panchenko
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  3. M. Pellegrino
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  4. F. Strumia
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Additional information

Work supported by G.N.S.M.-C.N.R. and M.P.I.

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Ioli, N., Panchenko, V., Pellegrino, M. et al. Amplification and saturation in a CO2 waveguide amplifier. Appl. Phys. B 38, 23–30 (1985). https://doi.org/10.1007/BF00691766

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  • DOI: https://doi.org/10.1007/BF00691766

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