Gain compression and its dependence on output power in a quantum dot laser
19 June 2013
The gain compression coefficient was evaluated by frequency modulation/amplitude modulation technique in a distributed feedback InAs/InGaAs quantum dot laser. Strong dependence of the gain compression coefficient on the output power was found. Analysis of the gain compression in frameworks of the modified well-barrier hole burning model reveals that the gain compression coefficient decreases beyond the lasing threshold in a good agreement with the experimental observation