Fig. 4From: Development of a 1550-nm InAs/GaAs Quantum Dot Saturable Absorber Mirror with a Short-Period Superlattice Capping Structure Towards Femtosecond Fiber Laser ApplicationsExperimental setup of mode-locked fiber laser with 1550-nm QD-SESAM. Inset: cross-sectional TEM image of the QD-SESAM and 1 × 1 μm2 AFM image of the 1550-nm QDsBack to article page