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Abstract

A wide range of FROG geometries have been used for ultrashort pulse characterisation, based on X (2) nonlinearities such as second-harmonic generation (SHG), and X (3) nonlinearities such as polarisation rotation, self-diffraction, and third harmonic generation (THG)[1]. The most sensitive technique is SHG-FROG, currently able to characterize pulses with pJ energy, but it does possess a fundamental ambiguity in the direction-of-time of the retrieved pulse. In this Chapter we describe the Fiber-FROG geometry [2] , which is based on the X (3) (Kerr) nonlinearity in an optical fiber. Using a fiber waveguide increases the interaction length so that a X (3)-based geometry gives a sensitivity comparable to SHG-FROG, but without any direction-of-time ambiguity.

Keywords

Ultrashort Pulse Incident Pulse Third Harmonic Generation Pulse Peak Power Temporal Ambiguity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • John M. Dudley
  • John D. Harvey
  • Mark D. Thomson

There are no affiliations available

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