The Effect of Saturable Absorber Concentration on Pulse Duration and Energy Stability of Hybrid Mode-Locked YAlO3:Nd3+- Laser with GaAs Passive Negative Feedback

The effects of the saturable absorber absorption on the pulse duration and stability of active-passively mode-locked YAlO3:Nd3+ laser were investigated. The optimum conditions for energy stability and pulse duration were obtained at the absorption coefficient of α0 = 10.5 cm-1. The energy stability of the steady-state part of the pulse train, containing approximately 60 pulses, was achieved to be less than ±1% r.m.s.. The nonlinear behavior of the passive negative feedback element was also observed.