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Two-color cross-correlation of fs-laser pulses by two-photon induced photoconductivity for near and far field optical measurements |
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| Authors: | Wolfgang Schade David L Osborn Jan Preusser Stephen R Leone |
| Institution: | JILA, University of Colorado and National Institute of Standards and Technology and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0440, USA |
| Abstract: | Two-color two-photon induced photoconductivity in a GaAsP diffusion type photodiode is demonstrated by measuring femtosecond cross-correlation functions for widely separated wavelength pairs of 775 and 1300 nm. Results are obtained for a range of tunable wavelengths and average powers of the incident lasers by measuring the two-photon induced photocurrent as a function of the optical delay between the pulses. The temporal autocorrelation of femtosecond laser pulses in the near-field of a small diameter aluminum coated optical fiber tip is also obtained with the same photodiode method for single colors. |
| Keywords: | Photodiodes Photoconductivity Semiconducting gallium compounds Ultrafast phenomena Laser pulses Optical fibers Photons Diffusion in solids Optical correlation Femtosecond cross correlation functions Far field optical measurements |
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