摘要
The efficient generation of a 1.17-mJ laser pulse with 360 ps duration using an ytterbium （Yb）-doped fiber amplifier chain seeded by a homemade mode-locked fiber laser is demonstrated experimentally. A specially designed figure-of-eight fiber laser acts as the seed source of a chirped-pulse amplification （CPA） system and generates mode-locked pulses with hundreds of picosecond widths. Two kinds of large-mode-area （LMA） double-clad Yb-doped fibers are employed to construct the pre-amplifier and main amplifier. All of the adopted instruments help avoid severe nonlinearity in fibers to raise sub-nanosecond pulse energy with acceptable signal-to-noise ratio （SNR）. The output spectrum of this fiber-based CPA system shows that amplified spontaneous emission （ASE） is suppressed to better than 30 dB, and the onset of stimulated Raman scattering is excluded.
The efficient generation of a 1.17-mJ laser pulse with 360 ps duration using an ytterbium （Yb）-doped fiber amplifier chain seeded by a homemade mode-locked fiber laser is demonstrated experimentally. A specially designed figure-of-eight fiber laser acts as the seed source of a chirped-pulse amplification （CPA） system and generates mode-locked pulses with hundreds of picosecond widths. Two kinds of large-mode-area （LMA） double-clad Yb-doped fibers are employed to construct the pre-amplifier and main amplifier. All of the adopted instruments help avoid severe nonlinearity in fibers to raise sub-nanosecond pulse energy with acceptable signal-to-noise ratio （SNR）. The output spectrum of this fiber-based CPA system shows that amplified spontaneous emission （ASE） is suppressed to better than 30 dB, and the onset of stimulated Raman scattering is excluded.
基金
supported by the National Key Natural Science Foundation of China under Grant No. 60537060
