Fig. 2From: Elimination of Bimodal Size in InAs/GaAs Quantum Dots for Preparation of 1.3-μm Quantum Dot LasersThe active region structure and PL spectrum. a The structure of the undoped QD laser active region. b PL spectrum of the QD laser active region at room temperature (RT). The emission peak is 1305 nm and the FWHM is about 31 nmBack to article page