The characteristics of active and active-passive mode-locked phosphate glass oscillators are reported. Active mode- locked pulse duration was about 200 ps with relatively stable output. For an active-passive mode-locked laser with a pulse duration of 7 ps, the probability for occurring satellite pulses was related to the. modulation index of the modulator. Using various intracavity etalons, the pulse duration of 30 ps and 70 ps were generated without satellite pulses. The performances of the active-passive mode-locked laser are better than that of the passive one.