Mode-locked ytterbium fiber lasers.
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.
Orsila
Lasse
L
Optoelectronics Research Centre, Tampere University of Technology, PO Box 692, FIN-33101, Tampere, Finland. lasse.orsila@orc.tut.fi
Gomes
Luís A
LA
Xiang
Ning
N
Jouhti
Tomi
T
Okhotnikov
Oleg G
OG