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Prediction of CO2laser signatures

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1 Author(s)
Schiffner, G. ; Institut für Hochfrequenztechnik, Technische Hochschule Wien, Wien, Austria

Based on previous work, a method is presented to predict the signature of a CO2laser, i.e., the output power as a function of the cavity length. For that purpose the normalized laser intensity curve versus cavity length is determined for a single line. The calculation is based on a homogeneously broadened line (Lorentzian shape) and takes into account the line dispersion. The curve is a parabola and its shape is assumed as being the same for all lines considered. From calculated positions of line centers and small-signal-gain data the signature can be drawn with the help of a parabolic French curve. The transition from one line to the next is assumed to occur at crossings of the normalized intensity curves. The theory agrees well with the experiment.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:8 ,  Issue: 12 )