CoverL Division has developed a new, high-power lO0-fs laser to study solid-density plasmas. A colliding-pulse mode-locked (CPM) dye laser is used to generate tile initial laser pulses. The photograph shows the saturable absorber dye jet that modelocks the laser to provide pulsed operation from a continuous-wave pumped laser cavity. The saturable absorber consists of a 30-to 50-1_m-thick jet of DODCI dye dissolved i,, ethylene glycol. The solution is pumped through the nozzle at the top of the photograph and collected in the funnel at the bottom. The jet is enclosed by two concave mirrors, forming a subresonator that focuses the intercavity beam on the jet. Shown is tile 620-nra wavelength intercavity beam of the CPM laser. This beam is then anlplified in a series of dye and titanium sapphire amplifiers to produce 100-fs pulses with 1 J of energy.
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