Abstract
A reflective single-walled carbon nanotube as saturable absorber has been firstly adopted to a passively mode-locked Nd,Y:SrF2 crystal. Without any dispersion compensation, the stably mode-locked laser delivers pulses with pulse width as short as 1.7ps, repetition rate of 107.8MHz and center wavelength of 1056nm. The oscillator produces maximum average output power of 319mW corresponding with a high slope efficiency of 20.2%. The single pulse energy and the peak power are 2.96nJ and 1.74kW, respectively. The experimental results show that single-walled carbon nanotube is an excellent saturable absorber for mode-locked lasers.
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