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Optics Letters

Optics Letters


  • Vol. 21, Iss. 15 — Aug. 1, 1996
  • pp: 1108–1110

Four-wave-mixing interferometer

N. Tang and J. P. Partanen  »View Author Affiliations

Optics Letters, Vol. 21, Issue 15, pp. 1108-1110 (1996)

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We have developed a new method of determining in time both the real and the imaginary parts of third-order nonlinear-optical coefficients. In this method the phase-conjugated four-wave-mixing signal beam interferes with one of the transmitted pump beams. By comparing the interference pattern with that of a known reference, we are able to determine the real and the imaginary parts of the third-order optical nonlinearity for an unknown sample. The real and the imaginary parts can also be separated when one incoming beam is delayed. We apply this method to a bis-thienyl polyene molecule containing five conjugate double bonds and find that the hyperpolarizability is γ1111 = (−2.5 − 0.17i) × 10−30 esu.

© 1996 Optical Society of America

Original Manuscript: November 17, 1995
Published: August 1, 1996

N. Tang and J. P. Partanen, "Four-wave-mixing interferometer," Opt. Lett. 21, 1108-1110 (1996)

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