1617 nm emission control of an Er:YAG laser by a corrugated single-layer resonant grating mirror

Abstract : A resonant grating mirror (RGM) that combines a single layer planar waveguide and a subwavelength grating is used to simultaneously control the beam quality, the spectral bandwidth, and the polarization state of an Er:YAG laser. This simple device is compared to classical methods using several intracavity components: an etalon for wavelength selection, a thin film polarizer for polarization selection, and an aperture for spatial filtering. It is demonstrated that the RGM provides the same polarization purity, an enhanced spectral filtering, and a significant improvement of the beam quality. In CW operation, the Er:YAG laser with a RGM emits an output power of 1.4 W at 1617 nm with a M 2 of 1.4. Resonantly diode-pumped Er:YAG laser cavities are studied for their capability to emit a laser beam at wavelengths within the eye-safe region, i.e., at 1617 and 1645 nm, where the atmosphere is mostly transparent. The natural laser emission (i.e., without any wavelength selective component in the cavity) of Er:YAG occurs at 1645 nm since it requires a lower population inversion. However, for applications requiring kilometer range propagation such as telemetry, wind mapping, active imaging , or Lidar in general, laser operation at 1617 nm is more efficient since the atmosphere is free of methane absorption at this wavelength [1]. Moreover, polarized emission is useful for the detection of atmosphere pollutants or materials. Finally, a high beam quality (M 2
Type de document :
Article dans une revue
Optics Letters, Optical Society of America, 2014, 39 (3), pp.466-469. 〈10.1364/OL.39.000466〉
Liste complète des métadonnées

Littérature citée [7 références]  Voir  Masquer  Télécharger

https://hal-iogs.archives-ouvertes.fr/hal-01304691
Contributeur : Fatima Pereira <>
Soumis le : mercredi 20 avril 2016 - 10:51:55
Dernière modification le : mardi 30 janvier 2018 - 16:32:01
Document(s) archivé(s) le : jeudi 21 juillet 2016 - 12:00:45

Fichier

OL Aubourg 1617 ErYAG miroir r...
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Adrien Aubourg, Martin Rumpel, Julien Didierjean, Nicolas Aubry, Thomas Graf, et al.. 1617 nm emission control of an Er:YAG laser by a corrugated single-layer resonant grating mirror. Optics Letters, Optical Society of America, 2014, 39 (3), pp.466-469. 〈10.1364/OL.39.000466〉. 〈hal-01304691〉

Partager

Métriques

Consultations de la notice

272

Téléchargements de fichiers

35