caa a22 4500 445371129 CHVBK 20180317142947.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00340-011-4688-8 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4688-8 All organic DFB laser enhanced by intermediate high refractive index polymer layer [Elektronische Daten] [N. Tsutsumi, M. Shinobu] 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 0.14mJ/cm2/pulse were measured for the waveguides with 1.7 and 3.4μm 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 45nm, lasing threshold was reduced from 0.18 to 0.04mJ/cm2/pulse for the waveguide with 1.7μm active layer. The slope efficiency increased from 3.5 to 4.2%. Springer-Verlag, 2011 Tsutsumi N. Department of Macromolecular Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo, 606-8585, Kyoto, Japan aut Shinobu M. Department of Macromolecular Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo, 606-8585, Kyoto, Japan aut Applied Physics B Springer-Verlag 105/4(2011-12-01), 839-845 0946-2171 105:4<839 2011 105 340 https://doi.org/10.1007/s00340-011-4688-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4688-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tsutsumi N. Department of Macromolecular Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo, 606-8585, Kyoto, Japan aut NATIONALLICENCE 700 1- Shinobu M. Department of Macromolecular Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo, 606-8585, Kyoto, Japan aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 105/4(2011-12-01), 839-845 0946-2171 105:4<839 2011 105 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer