A peak power of 1 TW has been obtained in XeCl with a pulse width of 310 fs and the amplified spontaneous emission (ASE) less than 3% in energy. The property of ASE was analyzed for different gains. Based on this analysis, the ASE coupling between stages was suppressed by using an appropriate spatial filter along with operating at a low-gain level. The saturation characteristics of UV dyes were investigated and analyzed for subpicosecond pulses. BBQ [4,4’’’di(2-butyl-octoxy-1)-p-quarter-phenyl)] in cyclohexane showed the satisfactory performance for a saturable absorber in contrast and transmission.
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Watanabe et al. (1989) studied this question.
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