All organic DFB laser enhanced by intermediate high refractive index polymer layer |
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| Authors: | N Tsutsumi and M Shinobu |
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| Institution: | (1) Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy;(2) Department of Physics, University of Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;(3) Department of Physics, Polytechnic Institute of Milan, Piazza Leonardo da Vinci 32, 20133 Milan, Italy;(4) Optics Division, Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany;(5) Department Physik, Universit?t Hamburg Institut f?r Laser-Physik, Luruper Chaussee 149, 22761 Hamburg, Germany;(6) MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;(7) Institute of Nanostructure Technologies and Analytics (INA), University of Kassel, Heinrich-Plett-Str. 40, 34128 Kassel, Germany;(8) Al Technologies GmbH, Deutsche-Telekom-Allee 3, 64295 Darmstadt, Germany;(9) Department of Electrical, Electronic and Communication Engineering, Friedrich-Alexander-University of Erlangen-N?rnberg, Cauerstr. 9, 91058 Erlangen, Germany;(10) Department of Electrical, Electronic and Communication Engineering, Friedrich-Alexander-University of Erlangen-N?rnberg LHFT, Cauerstr. 9, 91058 Erlangen, Germany;(11) Division of Newport Corporation, Spectra-Physics, 1335 Terra Bella Avenue, 94043 Mountain View, CA, USA;(12) Division of Newport Corporation, Spectra-Physics, 1335 Terra Bella Avenue, 94043 Mountain View, CA, USA;(13) Research and Development, LASOS Lasertechnik GmbH, Carl-Zeiss-Promenade 10, 07745 Jena, Germany;(14) LASOS Lasertechnik GmbH, Carl-Zeiss-Promenade 10, 07745 Jena, Germany;(15) Laser-Laboratorium G?ttingen e.V., Hans-Adolf-Krebs-Weg 1, 37077 G?ttingen, Germany;(16) Bergfried 16, 37120 Bovenden, Germany;(17) The Chinese University of Hong Kong, Hong Kong, P. R. China;(18) Fachbereich Physik, Technische Universit?t Kaiserslautern, Erwin-Schr?dinger-Str. 49, 67663 Kaiserslautern, Germany;(19) Department of Physics, ETH Zurich, Institute of Quantum Electronics, Schafmattstr. 16, 8093 Zurich, Switzerland;(20) Department of Physics, ETH Zurich, Institute of Quantum Electronics, Schafmattstr. 16, 8093 Zurich, Switzerland;(21) Deutsches Elektronen Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany;(22) Deutsches Elektronen Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany;(23) Deutsches Elektronen Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany;(24) Laser Technology Laboratory, RIKEN, Hirosawa 2-1, Wako, 351-0198 Saitama, Japan;(25) Institute for Optics and Quantum Electronics, Friedrich-Schiller University Jena, Max-Wien-Platz 1, 07743 Jena, Germany;(26) Forschungszentrum Dresden-Rossendorf e.V., Bautzner Landstr. 128, 01328 Dresden, Germany;(27) Former Head Quantum Optics and Length Unit (retired), Physikalisch-Technische Bundesanstalt (PTB) Braunschweig, Bundesallee 100, 38116 Braunschweig, Germany |
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| Abstract: | Performances of a distributed feedback (DFB) organic dye laser were enhanced by introducing an intermediate high refractive
index layer of poly(N-vinylcarbazole) (PVCz) laminated between a glass substrate and a laser dye doped active polymer layer.
The active layer is consisted of rhodamine 6G and cellulose acetate (CA). Introduction of an intermediate layer allows a single
mode lasing. Slope efficiencies of 2.2 and 4.7% and thresholds of 0.3 and 0.14 mJ/cm2/pulse were measured for the waveguides with 1.7 and 3.4 μm active layers, respectively. Furthermore, permanent relief grating
on an intermediate layer gave rise to the reduction of the threshold. With increasing in amplitude of the relief grating from
20 to 45 nm, lasing threshold was reduced from 0.18 to 0.04 mJ/cm2/pulse for the waveguide with 1.7 μm active layer. The slope efficiency increased from 3.5 to 4.2%. |
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