We report a factor of 12 compression of the 5.4-ps, 1-kW pulses from a mode-locked dye laser. The pulses were frequency broadened and linearly chirped by the combined action of self-phase modulation and group velocity dispersion during passage through a 30-m single-mode optical fiber. The fiber output pulses were then compressed to 450-fs, 3-kW pulses by passage through a diffraction grating based dispersive delay line. These short pulses were tunable over the 300-Å range of the laser dye.
We report the observation of strong reshaping of 3-psec dye-laser pulses by nonlinear birefringence during passage through a 150-cm-long, single-mode optical fiber and a crossed polarizer. For lower-intensity input pulses to the fiber, the transmitted pulses were observed to be proportional to the cube of the input pulses. With increased intensity, more-complicated pulse shapes were obtained. Our experimental results agree well with the predicted intensity dependence of the reshaping action.
We report a factor of 65 compression of the 5.9-ps [full width at half-maximum (FWHM)] pulses from a mode-locked dye laser by a two-stage technique. In each stage the laser pulses were frequency broadened and linearly chirped by passage through a single-mode optical fiber, and then compressed by traversal of a diffraction grating based dispersive delay line. The final compressed output pulses had pulse widths of 90 fs (FWHM), peak powers of more than five times that of the input pulses, and were continuously tunable over the 300-Å range of the laser dye.
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