External Cavity, Actively Mode-Locked Gcsel And Amplification Characteristics Of Gcsoa(Grating Coupled Surface Emitting Semiconductor Optical Amplifier)

Catastrophic optical damage on the emitting surface of a Fabry-Perot semiconductor laser is one of the key limitations in the generationof high output power from these devices. One method to avoid the catastrophic failure is to enlarge the emission area. Owing to a large emission area, the Grating Coupled Surface Emitting laser (GCSEL) has the potential to generate higher output power as compared to conventional edge emitting semiconductor lasers, by avoiding catastrophic facet damage. This paper demonstrates an external cavity, active mode-locked GCSEL and amplification characteristics of GCSOA using a c.w. external cavity GCSEL