Title :
Passively Q -switched Ytterbium-Doped Double-Clad Fiber Laser With a Cr4+:YAG Saturable Absorber
Author :
Pan, Lei ; Utkin, Ilya ; Fedosejevs, Robert
Author_Institution :
Univ. of Alberta, Edmonton
Abstract :
A high-power and high-repetition-rate passively Q -switched ytterbium-doped single-mode double-clad fiber laser was built using a Cr4+:YAG saturable absorber (SA). Two different SAs with initial transmissions of Tomicron = 30% and Tomicron = 50% were studied. At the maximum coupled pump power of 9.8 W, an output power of 4.7 W, pulse duration of 143 ns, pulse repetition rate of 253 KHz, pulse energy of 18.5 muJ, and slope efficiency of 49% were obtained with the Tomicron = 30% SA.
Keywords :
Q-switching; fibre lasers; optical saturable absorption; JkJk:Yb; passively Q-switched ytterbium-doped double-clad fiber laser; pulse duration; pulse energy; pulse repetition rate; saturable absorber; slope efficiency; Brillouin scattering; Chromium; Fiber lasers; Laser excitation; Mirrors; Optical coupling; Optical pulses; Power generation; Pump lasers; Zinc compounds; Cr$^{4+}$:YAG saturable absorber (SA); double-clad (DC) Yb fiber laser; passive $Q$-switch;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.909700
