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Influence of collisions on radiative saturation and Lamb dip formation in CO2molecular lasers

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2 Author(s)
Kan, Tehmau ; Naval Research Laboratory, Washington DC, USA ; Wolga, George J.

Saturated gain profile measurements in CO2at pressures where a Lamb dip appears in the laser intensity reveal that individual rotation-vibration transitions saturate with a strong Doppler component in addition to the Lorentzian holes expected for a Doppler broadened line. This mixed inhomogeneous-homogeneous behavior represents cross-relaxation effects induced by collisions that change the molecule's velocity. A rate equation formulation of collision effects elucidates the role of elastic and rotational thermalizing collisions on saturation and Lamb dip formation in molecular lasers.

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Quantum Electronics, IEEE Journal of  (Volume:7 ,  Issue: 4 )