@article{5579,
  author = {J. Burghoorn and V. F. Anderegg and P. C. van Son and T. O. Klaassen and W. T. Wenckebach and R. J. Bakker and A. F. G. van der Meer and D. Oepts and P. W. van Amersfoort},
  title = {Free-Electron Laser-Induced 2-Photon Absorption in Hg1-Xcdxte},
  abstract = {The powerful output of FELIX, the recently built Rijnhuizen free electron laser, is used for the first frequency dependent study of nonlinear optical excitation of Hg1-xCdxTe in the far infrared spectral region. Two-photon interband absorption has been investigated as a function of power and wavelength from 20 mum to 36 mum. The expected quadratic dependence of the two-photon induced conductivity on laser intensity is observed. This nonlinear effect is used to perform autocorrelation experiments vielding the length of the micropulses of the free electron laser on a femtosecond time scale.},
  year = {1993},
  journal = {Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment},
  volume = {331},
  number = {1-3},
  pages = {254-256},
  month = {Jul 1},
  isbn = {0168-9002},
  doi = {10.1016/0168-9002(93)90053-k},
  language = {eng},
}