2 µm vector mode-locked pulses from Tm:Y2O3 ceramics laser

We report on stable passively mode-locked (ML) pulses with Tm:Y2O3 ceramics operating at a 2 mu m wavelength range for the first time. With a SESAM, synchronous ML pulses with dual-wavelengths are obtained, with a typical pulse width of 40 ps, a maximum output average power of 240 mW and a pulse repetition rate of similar to 124 MHz. The output pulses were further proved to be stable polarization-locked vector pulses. To our knowledge, this is also the first observation of vector pulses in 2 mu m ML solid-state oscillators.