The gain compression coefficient was evaluated by applying the frequency modulation/amplitude modulation technique in a distributed feedback InAs/InGaAs quantum dot laser. A strong dependence of the gain compression coefficient on the output power was found. Our analysis of the gain compression within the frame of the modified well-barrier hole burning model reveals that the gain compression coefficient decreases beyond the lasing threshold, which is in a good agreement with the experimental observations.
Received 10 April 2013Accepted 03 June 2013Published online 19 June 2013
This work was partially supported by the Russian Foundation for Basic Research, St. Petersburg Scientific Center of the Russian Academy of Sciences and the Russian Ministry of Education and Science, as well as by CNRS through the Associated International Laboratory “Nanostructures of Compound Semiconductors - Growth, properties, devices.”
Article outline: I. INTRODUCTION II. EXPERIMENTAL EVALUATION OF THE GAIN COMPRESSION COEFFICIENT III. ANALYTICAL DESCRIPTION OF THE GAIN COMPRESSION IN QD LASER IV. CONCLUSIONS