We report a greater than 20-fold compression during second-harmonic generation from an active–passive mode-locked Nd:YAG laser controlled by passive negative feedback. A compression ratio of 32 times is achieved in the beam center, resulting in a pulse duration of 360 fs.
© 1995 Optical Society of America
Original Manuscript: August 7, 1995
Published: November 1, 1995
Arvydas Umbrasas, James Jacob, Gintaras Valiulis, Algis Piskarskas, and Jean-Claude Diels, "Generation of femtosecond pulses through second-harmonic compression of the output of a Nd:YAG laser," Opt. Lett. 20, 2228-2230 (1995)