High-power tunable quantum fountain unipolar lasers
| Autor: | F. H. Julien, Carlo Sirtori, Gottfried Strasser, B. Seguin-Roa, Olivier Gauthier-Lafaye, Jean-Yves Duboz, Philippe Collot |
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| Rok vydání: | 2000 |
| Předmět: |
Materials science
business.industry Physics::Optics Laser pumping Injection seeder Condensed Matter Physics Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Optical pumping Optics law Quantum dot laser Diode-pumped solid-state laser Optoelectronics Physics::Atomic Physics business Quantum well Tunable laser |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 7:12-19 |
| ISSN: | 1386-9477 |
| Popis: | We report on high-power GaAs/AlGaAs quantum fountain unipolar lasers emitting at 14– 15 μm under optical pumping by a pulsed CO2 laser. Two kinds of devices were investigated: edge lasers with side-facet pumping and broad-area lasers with a patterned top grating for coupling the pump at normal incidence. Collected optical powers as high as 4.16 W corresponding to an estimated power per facet of 17.6 W have been achieved in TM00 mode for broad-area lasers. The lasing wavelength is shown to be tunable (Δλ/λ≈2.5%) by changing the pump wavelength. Broad-area lasers exhibit excellent beam quality with very low in-plane divergence in TM00 mode. Mode hopping is observed under intense pumping. |
| Databáze: | OpenAIRE |
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