Narrow pulse fiber amplifier
A fiber amplifier and narrow pulse technology, which is applied in lasers, laser components, optics, etc., can solve the problems that the repetition frequency cannot be changed freely and the pulse repetition frequency is high, achieve high peak power level, increase peak power, and avoid stimulated distribution Effect of Rieouin Scattering Effect
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[0026] Such as figure 1 The system structure shown, wherein the seed source laser 1 adopts semiconductor pump mode-locked Nd:YVO with 1W average power output 4 A solid-state laser with a wavelength of 1064 nm, a pulse width of the seed pulse 9 of 100 ps, and a repetition rate of 100 MHz. The pulse picker 2 uses an acousto-optic modulator and a matching radio frequency power supply to deflect unwanted pulses on the optical path and be absorbed by the absorption box 3 . The pulse picker 2 has a repetition rate of 500kHz, the duration of the pulse picker 2 open state is 100ns, and 10 mode-locked pulses are included in this duration. The selected pulse sequence 10 is coupled into the core of the gain fiber 5 through the seed optical coupling system 4 . The gain fiber 5 is a Yb-doped double-clad polarization-maintaining fiber with a core diameter of 20 μm and an inner cladding diameter of 400 μm. The pump absorption coefficient at 976 nm is 3 dB / m, and the fiber length is 6 m. ...
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