KALEIDOSCOPE™

Hollow Fiber Compressor | Few cycle pulse generation (< 7 fs)

Gain narrowing prevents the generation of few-cycle femtosecond pulses directly from amplifiers. Sub-35 fs pulses with energies between 0.4 mJ and 2 mJ can be efficiently spectrally broadened in noble-gas-filled hollow fibers. Subsequent compensation of the chirp carried by the spectrally broadened pulses by means of a broadband chirped mirror compressor allows generating near-bandwidth limited sub-7 fs pulses. In order to avoid bending losses the hollow fiber is attached to an ultra precise V-groove mount. Thin (0.5 mm) Brewster-angled windows are used to minimize both the losses and the dispersion of the chamber.

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