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Measuring femtosecond pulse in space-time domain

Liu Wen-Jun Ren Shou-Tian Qu Shi-Liang

Measuring femtosecond pulse in space-time domain

Liu Wen-Jun, Ren Shou-Tian, Qu Shi-Liang
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Publishing process
  • Received Date:  06 March 2009
  • Accepted Date:  28 July 2009
  • Published Online:  15 May 2010

Measuring femtosecond pulse in space-time domain

  • 1. 哈尔滨工业大学(威海)光电科学系,威海 264209

Abstract: We analyze theory of the spatiotemporal coupling in the electric field of a femtosecond pulse. The complete spatiotemporal characterization of femtosecnd pulse is realized by use of spatially and spectrally resolved intensity and phase evaluation device. The apparatus combines the spatially and spectrally resolved interferometry. The unknown and reference pulses pass through a 2D diffraction grating, generating a tilted 2D array of holograms. A tilted bandpass filter separates the beam pairs so that each hologram contains a single, unique frequency. A single camera frame records all of the holograms, from which the complete spatiotemporal field of the unknown pulse can be reconstructed.

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