Highly efficient, diffraction-limited laser emission from a vertical external-cavity surface-emitting organic laser

We report on a solid-state laser structure functioning as the organic counterpart of a vertical external-cavity surface-emitting laser (VECSEL) design. The gain medium is a poly(methyl methacrylate) film doped with Rhodamine 640, spin casted onto the high-reflectivity mirror of a plano-concave reson...

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Bibliographic Details
Published in:Optics letters 2010-06, Vol.35 (12), p.1968-1970
Main Authors: RABBANI-HAGHIGHI, Hadi, FORGET, Sébastien, CHENAIS, Sébastien, SIOVE, Alain
Format: Article
Language:English
Subjects:
Doped-insulator lasers and other solid state lasers
Dye lasers
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lasers
Optical materials
Optics
Physics
Polymers and organics
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Summary:We report on a solid-state laser structure functioning as the organic counterpart of a vertical external-cavity surface-emitting laser (VECSEL) design. The gain medium is a poly(methyl methacrylate) film doped with Rhodamine 640, spin casted onto the high-reflectivity mirror of a plano-concave resonator. Upon pumping by 7 ns pulses at 532 nm, a diffraction-limited beam (M(2)=1) was obtained, with a conversion efficiency of 43%; higher peak powers (2 kW) could be attained when resorting to shorter (0.5 ns) pump pulses. The spectrum was controlled by the thickness of the active layer playing the role of an intracavity etalon; tunability is demonstrated at over and up to 20 nm.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.35.001968