Lossless generation of a single-lobe symmetric beam from the output of a CO2 waveguide laser array

Year: 1996

Authors: Lapucci A., Lescroart G., Bourdet G.L.

Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy;
Laboratoire d’Optique Appliquée, Ecole Nationale Supérieure de Techniques Avancées, Ecole Polytechnique, Centre de l’Yvette, 91120, Palaiseau, France

Abstract: The undesired side lobes in the far field emission of a linear array of phase coupled lasers can be reduced by using a phase correcting mirror outside the laser array cavity. Even in that case the beam has strong asymmetry and astigmatism, that can be corrected by an off-axis spherical mirror. In this Letter we show the beam obtained experimentally with this kind of correction. The global optical set-up consists of three reflective optical elements producing a nearly lossless transforma-tion of the field distribution from a periodic repetition of small highly divergent sources to a quasi-Gaussian symmetric beam.

Journal/Review: OPTICS COMMUNICATIONS (PRINT)

Volume: 132 (1-2)      Pages from: 111  to: 115

KeyWords: Cavity resonators; Laser beams; Light propagation; Light reflection; Mirrors; Optical waveguides, Laser arrays; Phase correcting mirror; Quasi Gaussian symmetric laser beam, Carbon dioxide lasers
DOI: 10.1016/0030-4018(96)00330-6

Citations: 5
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