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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1991),
  • paper CTuW42

Femtosecond resolution pulse duration and chirp measurement by picosecond streak camera

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Abstract

We present a novel, linear method for short- pulse measurements, basically different from second-order autocorrelation techniques.1 The main idea of the method follows: The pulse to be measured is lengthened by Treacy compressors so that its shape becomes measurable by a streak camera. Because the shape and duration of the pulse after a Treacy compressor depend on both the pulse duration and phase structure of the input pulse, the input pulse can be reconstructed by analyzing the streak camera traces. This analysis can be rather complicated; but, in many practical cases, we can adopt a specific input pulse form, which greatly facilitates data evaluation. If, for instance, we assume that the input pulse is Gaussian and linearly chirped, the input pulse duration and chirp can be readily calculated from two independent measurements by two Treacy compressors with different group-velocity dispersions (GVDs). In its basic approach, this method somewhat resembles earlier techniques.2-3 However, the detection method is linear (no frequency doubling is needed); thus it provides much higher energy sensitivity and full spectral coverage from the UV to the IR.

© 1991 Optical Society of America

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