The invention relates to a high-energy few-cycle ultra-high-
signal to
noise ratio
femtosecond seed pulse generation device.
Laser outputted by an 800nm-
wave band 1kHz
laser is split into two beams; one of the two
laser beams passes through a beam contracting
system and a frequency multiplication
crystal, so that a 400nm frequency-multiplied light can be generated, and the frequency-multiplied light passes through a light
delay system, and then, adopted as pumping light, is injected into a nonlinear
crystal; the other
laser beam passes through a beam contracting
system, a focusing system, an all-
solid-state spectral broadening system, a
dispersion compensation system and a
cross polarization wave generating system sequentially, and then, adopted as
signal lights, are injected into the nonlinear
crystal, and the
signal lights and the pumping light are altogether subjected to optical parametric amplification. The all-
solid-state spectral broadening system is adopted, so that the spectrum of incident light can be effectively broadened, and therefore, the system can operate compactly and stably assuredly, and at same time, the device is convenient to adjust, is simple and efficient, can achieve integration and
miniaturization, and can provide a high-quality seed source for
ultrashort laser system.