Abstract
We demonstrated a high-peak-power, single-frequency, single-mode, linearly polarized, nanosecond all-fiber laser in master oscillator power amplifier configuration. The pulsed seed was generated by modulating a single-frequency continuous wave laser at 1064 nm. The short pulse width () of the pulsed seed prevented the onset of stimulated Brillouin scattering in the 10 μm-core single-transverse-mode polarization-maintaining ytterbium-doped fiber of the main amplifier. In order to compensate self-phase modulation-induced spectral broadening, a phase modulator was employed to control the phase of the pulsed seed, and the linewidth of the output pulses were reduced from to at the peak power of 1.47 kW.
© 2013 Optical Society of America
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