A compact fiber laser is demonstrated with use of a Gires-Tournois compensator and a short length (2–4 cm-long) of highly doped ytterbium (Yb) fiber providing net anomalous group-velocity dispersion. With use of a novel semiconductor saturable absorber mirror based on GaInNAs structure, self-started 1.5-ps-pulse mode-locked operation was obtained at 1023 nm with a repetition rate of 95 MHz. A mode-locked Yb-doped fiber laser was developed without the use of any dispersion compensation technique. Overall group-velocity dispersion was minimized by using a short length of highly doped Yb fiber in a compact amplifying loop cavity. Self-started mode-locked operation was obtained in 980–1030-nm wavelength range with a fundamental repetition rate of 140 MHz.
© 2004 Optical Society of America
Original Manuscript: June 2, 2003
Revised Manuscript: November 14, 2003
Published: March 20, 2004
Lasse Orsila, Luís A. Gomes, Ning Xiang, Tomi Jouhti, and Oleg G. Okhotnikov, "Mode-locked ytterbium fiber lasers," Appl. Opt. 43, 1902-1906 (2004)