The investigation on the continuous wave, self Q-switched, self mode locked, and self Q-switched self mode locked operations of a Cr:LiSAF laser with a three mirror cavity and with low pump power from an argon ion laser at the 488 nm line are reported. Without any active modulator or saturable absorber in the cavity, 51 fs pulses at a repetition of 150 MHz and with an average output power of 48 mW for 860 mW pump power are obtained.