hv photonics Article Organic Diode Laser Dynamics: Rate-Equation Model, Reabsorption, Validation and Threshold Predictions Daan Lenstra 1,* , Alexis P.A. Fischer 2,3 , Amani Ouirimi 2,3, Alex Chamberlain Chime 2,3,4 , Nixson Loganathan 2,3 and Mahmoud Chakaroun 2,3 1 Institute of Photonics Integration, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands 2 Laboratoire de Physique des Lasers, Universite Sorbonne Paris Nord, UMR CNRS 7538, 99 Avenue JB Clement, 93430 Villetaneuse-F, France; fi
[email protected] (A.P.A.F.);
[email protected] (A.O.);
[email protected] (A.C.C.);
[email protected] (N.L.);
[email protected] (M.C.) 3 Centrale de Proximite en Nanotechnologies de Paris Nord, Universite Sorbonne Paris Nord, 99 Avenue JB Clement, 93430 Villetaneuse-F, France 4 IUT-FV de Bandjoun, Université de Dschang, BP 134 Bandjoun, Cameroon * Correspondence:
[email protected]; Tel.: +31-488-75241 Abstract: We present and analyze a simple model based on six rate equations for an electrically pumped organic diode laser. The model applies to organic host-guest systems and includes Stoke- shifted reabsorption in a self-consistent manner. With the validated model for the Alq3:DCM host- guest system, we predict the threshold for short-pulse laser operation. We predict laser operation characterized by damped relaxation oscillations in the GHz regime and several orders of magnitude linewidth narrowing. Prospect for CW steady-state laser operation is discussed. Keywords: optoelectronics; OLED; laser; organic laser diode; laser dynamics Citation: Lenstra, D.; Fischer, A.P.A.; Ouirimi, A.; Chime, A.C.; Loganathan, N.; Chakaroun, M.