title: Negative-branch unstable-resonator copper-vapor laser.
abstract: Copper-vapor lasers (CVL's) with positive-branch unstable resonators have been used extensively for reducing output-beam divergence. In contrast, the negative-branch unstable resonator has not been applied to CVL's. Here we study the performance of a negative-branch unstable-resonator CVL with various magnifications. A divergence of approximately 3.25 times the diffraction limit was obtained.
authors.affiliation: Centre for Advanced Technology, Rajendra, Nagar, Indore 452012, India.
authors.forename: S K
authors.initials: SK
authors.lastname: Dixit
authors.forename: B
authors.initials: B
authors.lastname: Singh
authors.forename: S V
authors.initials: SV
authors.lastname: Nakhe
authors.forename: J K
authors.initials: JK
authors.lastname: Mittal
authors.forename: R
authors.initials: R
authors.lastname: Bhatnagar