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Optics Letters

Optics Letters


  • Vol. 20, Iss. 4 — Feb. 15, 1995
  • pp: 407–409

Cross-correlation technique for single-shot measurements of weak light pulses

L. Zheng and D. D. Meyerhofer  »View Author Affiliations

Optics Letters, Vol. 20, Issue 4, pp. 407-409 (1995)

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We have developed and demonstrated a simple, single-shot method to measure the duration of a weak ultrafast pulse. The density of free electrons in a semiconductor is changed by a pump beam, causing a time-dependent variation of the refractive index, which in turn determines the spatial distribution of the reflected probe-beam intensity. The derivative of the spatial distribution in the transition region is a cross correlation of the pump and probe pulses. This technique is suitable for measuring weak pulses such as low-level synchrotron light in the mid-infrared-to-far-infrared range.

© 1995 Optical Society of America

Original Manuscript: October 17, 1994
Published: February 15, 1995

L. Zheng and D. D. Meyerhofer, "Cross-correlation technique for single-shot measurements of weak light pulses," Opt. Lett. 20, 407-409 (1995)

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