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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 2, Iss. 4 — Apr. 1, 1985
  • pp: 626–633

Measurement of the phase of a frequency-swept ultrashort optical pulse

Joshua E. Rothenberg and D. Grischkowsky  »View Author Affiliations

JOSA B, Vol. 2, Issue 4, pp. 626-633 (1985)

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We show theoretically and confirm experimentally that, by propagating a frequency-swept ultrashort pulse through an ensemble of two-level systems, it is possible to measure the time-dependent relative phase of the pulse with respect to that of the impact-excited oscillating resonant polarization. The phase is obtained from the intensity modulation of the pulse as measured by a cross-correlation technique.

© 1985 Optical Society of America

Original Manuscript: December 10, 1984
Manuscript Accepted: December 20, 1984
Published: April 1, 1985

Joshua E. Rothenberg and D. Grischkowsky, "Measurement of the phase of a frequency-swept ultrashort optical pulse," J. Opt. Soc. Am. B 2, 626-633 (1985)

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  1. R. L. Fork, B. I. Greene, C. V. Shank, “Generation of optical pulses shorter than 0.1 psec by colliding pulse mode locking,” Appl. Phys. Lett. 38, 671 (1981). [CrossRef]
  2. See, for example, J.-M. Halbout, C. L. Tang, “Generation of 55-fsec optical pulses,” IEEE J. Quantum Electron. QE-19, 487 (1983);W. Dietel, J. J. Fontaine, J. C. Diels, “Intracavity pulse compression with glass: a new method of generating pulses shorter than 60 fsec,” Opt. Lett. 8, 4 (1983);see also Ref. 7. [CrossRef] [PubMed]
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  12. We note that this approach has the limitation that the time variations in the input-pulse intensity must be slower than the time scale on which the phase of the pulse changes.
  13. The vapor cell had two 3-mm-thick windows, which did not have a significant effect on the results. In general, the linearity of the system allows one conceptually to think of both windows being at the cell input, in which case they will have the effect of changing the frequency sweep rate of the input pulse by a small amount. In the experimental and the theoretical cases considered here, this effect is negligible.
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