Abstract

The evolution of the intensity profile of transversely excited atmospheric CO2 laser pulses is investigated within the intensity moment formalism. The beam quality factor M2 is used to study the mode evolution. Attention is focused on the influence of both the gas mixture (N2:CO2: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 M2 parameter.

© 2001 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Complete spatial characterization of a pulsed doughnut-type beam by use of spherical optics and a cylindrical lens

Julio Serna, Fernando Encinas-Sanz, and George Nemeş
J. Opt. Soc. Am. A 18(7) 1726-1733 (2001)

Beam propagation through uniaxial anisotropic media: global changes in the spatial profile

R. Martı́nez-Herrero, J. M. Movilla, and P. M. Mejı́as
J. Opt. Soc. Am. A 18(8) 2009-2014 (2001)

Generalized M2 factor of hard-edged diffracted flattened Gaussian beams

Baida Lü and Shirong Luo
J. Opt. Soc. Am. A 18(9) 2098-2101 (2001)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (34)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription