Precision spectral shaping applied to FM pulses

Summary from only given. Materials such as Yb:SFAP are a promising gain medium for future high-repetition- rate, diode-pumped fusion lasers for energy applications. Beam-smoothing requirements dictate, however, that these lasers have an amplified FM bandwidth of /spl sim/ 1/3 THz prior to frequency conversion, which is comparable to the gain bandwidth ofYb:SFAP. Therefore, gain narrowing in these amplifiers will reduce the on-target bandwidth and produce severe, potentially damaging amplitude modulation (AM) at the output of the laser system.