KEYWORDS: Optical amplifiers, Optical fibers, Fiber amplifiers, High power fiber amplifiers, Fiber lasers, Pulsed laser operation, Laser systems engineering, Amplifiers, Optical isolators, High power lasers
The experimental study on an all-fiber laser pulse amplifier system using homemade double-cladding Yb-doped fibers as
gain media is presented. Secondary pulse phenomenon produced in the pulse amplifier system is analyzed and
investigated. We find that the phenomenon depends a lot on the quality of splicing between different fibers and the
amplification multiple. By controlling the pump power and amplification multiples of the amplifier and trying different
splicing parameters, we can get stable high power pulse lasing output. Finally, using the Yb-doped double-cladding
fiber(YDCF) and master oscillation power amplification (MOPA) techniques, a stable all-fiber pulse amplification
system is obtained, with lasing wavelength at 1064 nm, 20 ns line-width pulses, average power of 2.4W and repetition
rate of 50kHz.
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