The wedge inside the oscillator is not only used for coarse adjustment of the carrier envelope phase in CEP stabilized systems (the fine adjustment and stabilization is done via modulation of the pump power), but also for the fine tuning of the dispersion of the resonator. To obtain the extreme spectral bandwidth, in the range of a few hundred nm of the venteon series of oscillators, the overall dispersion of the resonator, while in mode-locked operation, has to be as close as possible to zero. Therefore, the wedge position inside the resonator matters considerably for obtaining the broadest spectrum for the short pulse measured during production. Please keep in mind that the wedge position might be changed after installation since the ambient conditions are different from the place of production. Related to: venteon
