Abstract
The lasing dynamics of a pulsed atmospheric-pressure (TEA) CO2 laser with a nonlinear medium (semiconductor InAs or InSb) inside the cavity is experimentally investigated. It is observed that introduction into the CO2 cavity of nonlinear media having high nonlinear-absorption and a nonlinear refractive index leads, on the one hand, to a limitation of the emission intensity in the cavity and to an increase of the pulse duration (FWHM) from ∼0.1 μsec to ∼2 μsec, and on the other to appearance, on the output-power pulse envelope, of spikes having irregular amplitudes and durations, and separated by irregular intervals. It is established that the transition from the intermode-beat-induced regular pulsations to chaos has an emission-intensity threshold.
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Additional information
Quantum Radiophysics Division, Lebedev Physics Institute. Translated from Preprint No. 136 of the Lebedev Physics Institute, Academy of Sciences of the USSR, 1989.
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Kovalev, V.I., Suvorov, M.B. & Tasmuratov, O.S. Regular and random output-power pulsations of a TEA CO2 laser with an intracavity nonlinear medium. J Russ Laser Res 11, 33–43 (1990). https://doi.org/10.1007/BF01124730
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DOI: https://doi.org/10.1007/BF01124730