INTRA-PULSE DECREASE OF M(2) OF A COPPER-VAPOR LASER-BEAM

Authors
OMATSU T TAKASE T KURODA K
Citation
T. Omatsu et al., INTRA-PULSE DECREASE OF M(2) OF A COPPER-VAPOR LASER-BEAM, Optics communications, 101(3-4), 1993, pp. 199-204
Citations number
10
Categorie Soggetti
Optics
Journal title
Optics communications → ACNP
ISSN journal
00304018
Volume
101
Issue
3-4
Year of publication
1993
Pages
199 - 204
Database
ISI
SICI code
0030-4018(1993)101:3-4<199:IDOMOA>2.0.ZU;2-2
Abstract
The temporal behavior of the beam divergence of a copper vapor laser ( CVL) equipped with on- or off-axis unstable resonators at 510.6 nm has been investigated experimentally and theoretically. The temporal chan ge of the beam divergence is measured using a streak camera and is eva luated by the M2 factor. Narrowing of the beam divergence during the p ulse is observed. Also is found that the difference of the narrowing r atio between the on-axis and off-axis unstable resonators resulted fro m the near-field pattern of the laser beam.