We report direct generation of chirped pulses from a room-temperature, Kerr lens mode-locked :forsterite oscillator operating at . To increase the pulse energy, the pulse repetition rate of the short x-type resonator was lowered from 143 to by the addition of a q-preserving multipass cavity, which provided an additional effective optical path length of . The duration of the chirped pulses was around with a spectral width of . The pulses were externally compressed to by using a diffraction grating pair. To our knowledge, this is the highest reported pulse energy directly generated from a room-temperature mode-locked :forsterite laser.
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