In this work, we experimentally demonstrated a high-power ultrafast fiber laser system, constructed in a monolithic fiber configuration. The chirped pulse was boosted in power through a single large-mode-area (LMA) fiber power amplifier. A maximum average power of 1593 W was generated at the central wavelength of 1050 nm. Thanks to the help of a fiber bandpass filter placed ahead, the Stimulated Raman Scattering (SRS) spectra excited at 1100 nm were under good suppression, which exhibited more than 40 dB lower in power. Grating pair compressor were used to de-chirped pulse, and 450-fs pulse width was obtained at the output power of 154 W. We are continuing to work on pulse compression at full power.
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