High-energy pulse compression by use of negative phase shifts produced by the cascade chi((2)):chi((2)) nonlinearity.

@article{Liu1999HighenergyPC,
  title={High-energy pulse compression by use of negative phase shifts produced by the cascade chi((2)):chi((2)) nonlinearity.},
  author={Xiaoming Liu and Long-sheng Qian and Frank W. Wise},
  journal={Optics letters},
  year={1999},
  volume={24 23},
  pages={
          1777-9
        }
}
We report a simple optical pulse-compression technique based on quadratic nonlinear media. Negative nonlinear phase shifts are generated by phase-mismatched second-harmonic generation, and the phase-modulated pulses are then compressed by propagation through materials with normal dispersion. Millijoule-energy pulses from a Ti:sapphire amplifier are compressed from 120 to 30 fs, and calculations indicate that compression ratios of >10 are realistically achievable by use of this approach with… CONTINUE READING

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