27 kW peak power all-fiber chirped pulse amplification seeded by dissipative soliton at 1.5 μm

Abstract

The high-power all-fiber femtosecond laser system demonstrated in this work operates at 1.5 μm and is integrated into a chirped-pulse amplification (CPA) setup. The system includes a dissipative soliton (DS) mode-locked oscillator that is followed by multiple amplification stages, an all-fiber pulse stretcher, power amplifiers, and a fiber-based compressor. Unlike conventional CPA setups that rely on free-space diffraction gratings requiring precise optical alignment, the all-fiber-based stretcher and compressor offer superior integration, stability, and simplicity. The CPA architecture delivers a maximum average output power of 1.12 W, with a pulse width of 363 fs and a repetition rate of 19.3 MHz. This configuration achieves a peak power of 27 kW and pulse energy of 10 nJ, with a minimal output power variation of 0.09 dB, indicating excellent long-term stability. The system’s compactness, environmental robustness, and high performance underscore its suitability for demanding applications such as supercontinuum generation, multiphoton imaging, and high-precision micromachining.