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Time-resolved spatial profile of TEA CO_2 laser pulses: influence of the gas mixture and intracavity apertures

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Serna Galán, Julio and Encinas Sanz, Fernando and Martínez Herrero, Rosario and Martin Mejías, Pedro (2001) Time-resolved spatial profile of TEA CO_2 laser pulses: influence of the gas mixture and intracavity apertures. Journal of The Optical Society Of America A-Optics Image Science and Vision, 18 (7). pp. 1734-1740. ISSN 1084-7529

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Official URL: http://dx.doi.org/10.1364/JOSAA.18.001734


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Abstract

The evolution of the intensity profile of transversely excited atmospheric CO_2 laser pulses is investigated within the intensity moment formalism. The beam quality factor M_2 is used to study the mode evolution. Attention is focused on the influence of both the gas mixture (N_2:CO_2:He) and the diameter of an intracavity diaphragm placed to attenuate higher-order modes. The degree of accuracy that can be attained by approximating the laser field amplitude by means of the lower-order terms of a Hermite-Gauss expansion is also analyzed. In particular, a bound for the truncation error is given in terms of two time-resolved spatial parameters, namely the beam width and the M_2 parameter.


Item Type:Article
Additional Information:

© 2001 Optical Society of America.
This work was supported by the Comisión Interministerial de Ciencia y Tecnología of Spain under project PB97-0295.

Uncontrolled Keywords:Partially Coherent Beams, Parametric Characterization, Evolution, CO_2-Laser, Light
Subjects:Sciences > Physics > Optics
ID Code:21974
Deposited On:28 Jun 2013 10:43
Last Modified:07 Feb 2014 10:39

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