Pulse interactions in a colliding pulse mode-locked vertical external cavity surface emitting laser

Delay-Differential-Equation Modeling of Mode-Locked Vertical-External-Cavity Surface-Emitting Lasers in Different Cavity Configurations

“…The model is easily generalized for different VECSEL and SA configurations, and examples for the case of folded geometry with the central chip being either the gain section or the SESAM are presented. Future work can concentrate on perfecting the model for the folded cavities, including an account of a partly coherent addition of signals (as in [35]) and possibly the lateral effects, as well as the polarization properties and more diverse geometries.…”

“…The cavity thus looks suitable, in principle, for picosecond pulse generation. In the case of the femtosecond regime using a low-dispersion optically pumped active chip, the more complex, yet also more reliable ring CPM geometry used in recent studies [35], may be preferable (the folded cavity studied here would need micrometer-scale balancing of subcavity lengths). More detailed investigation is reserved for future work.…”

VECSEL Platform for Single/Dual Frequency CW Operation and Ultrashort Pulse Generation

“…(c) The semiconductor gain and absorber structures used in the experiment were numerically optimized by modelling the pulse formation dynamics of the system. The ring shaped cavity geometry adopted was shown to improve the robustness of the modelocking regime and decrease the saturation fluence of the absorber [5]. It produced an output power of 90mW per beam at a repetition rate of 2.2GHz with a record pulse duration of 95fs at a central wavelength of 1026nm.…”

Coherent Beam Combining of a Colliding Pulse Modelocked VECSEL

“…Moloney and Stolz have recently demonstrated a colliding pulse modelocked (CPM) VECSEL in a ring cavity for the first time [8]. With pulses as short as 128 fs and 90 mW average output power [9] the performance is comparable to the state-of-the-art results obtained in a linear V-shaped cavity [3]. Our goal here is to coherently combine the two output beams from the ring cavity to double the peak power for more efficient supercontinuum generation.…”