Fig. 1From: Development of a 1550-nm InAs/GaAs Quantum Dot Saturable Absorber Mirror with a Short-Period Superlattice Capping Structure Towards Femtosecond Fiber Laser ApplicationsSchematic diagrams of QD structures. Schematic diagrams of three test structures of a sample 1, b sample 2, and c sample 3, respectivelyBack to article page