High-Power 1120-nm Yb-Doped Fiber Laser and Amplifier

An all-fiberized, laser-diode-pumped, high-power, 1120-nm Yb-doped fiber laser with master oscillator power amplifier configuration was demonstrated. The seed was a 178-W single-mode fiber laser with an optical efficiency of nearly 70%. An amplifier stage was built to boost the power to 309 W with t...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 25; no. 21; pp. 2093 - 2096
Main Authors Zhang, Hanwei, Xiao, Hu, Zhou, Pu, Wang, Xiaolin, Xu, Xiaojun
Format Journal Article
LanguageEnglish
Published IEEE 01.11.2013
Subjects
Fiber lasers
high power
Laser excitation
long wavelength
Optical fiber amplifiers
Power amplifiers
Power generation
Power lasers
Pump lasers
Yb-doped fiber laser
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Summary:An all-fiberized, laser-diode-pumped, high-power, 1120-nm Yb-doped fiber laser with master oscillator power amplifier configuration was demonstrated. The seed was a 178-W single-mode fiber laser with an optical efficiency of nearly 70%. An amplifier stage was built to boost the power to 309 W with the slope efficiency of 80%. The M 2 factors, measured in the end of the amplifier at output power of 253 W, are 2.45 and 2.82 in x- and y-directions, respectively. A numerical model was also proposed to evaluate the ability of seed power level in suppressing amplified spontaneous emission in the fiber amplifier. The result indicates that the ratio of the pump power and seed power should not be higher than four for our amplifier if there is no special design to suppress amplified spontaneous emission.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2013.2280731