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Photonic crystal spatial filtering in broad aperture diode laser

Authors :
Crina Cojocaru
K. Staliunas
Guillermo Garre-Werner
J. Trull
Joan Montiel-Ponsoda
Vytautas Purlys
Darius Gailevičius
S. Gawali
Universitat Politècnica de Catalunya. Doctorat en Física Computacional i Aplicada
Universitat Politècnica de Catalunya. Departament de Física
Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers
Source :
UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC), Recercat. Dipósit de la Recerca de Catalunya, instname
Publication Year :
2019

Abstract

Broad aperture semiconductor lasers usually suffer from low spatial quality of the emitted beams. Due to the highly compact character of such lasers, the use of conventional intracavity spatial filters is problematic. We demonstrate that extremely compact photonic crystal spatial filters, incorporated into a laser resonator, can improve the beam spatial quality and, correspondingly, increase the brightness of the emitted radiation. We report the decrease in the M2 value from 47 down to 28 due to photonic crystal spatial intracavity filtering and the increase in the brightness by a factor of 1.5, giving a proof of principle of intracavity photonic crystal spatial filtering in broad area semiconductor lasers.

Details

Language :
English
Database :
OpenAIRE
Journal :
UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC), Recercat. Dipósit de la Recerca de Catalunya, instname
Accession number :
edsair.doi.dedup.....8b9dd739e546f0857732043d7cbbb7d4