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Optics Letters

Optics Letters


  • Vol. 14, Iss. 17 — Sep. 1, 1989
  • pp: 955–957

High-sensitivity, single-beam n2 measurements

M. Sheik-bahae, A. A. Said, and E. W. Van Stryland  »View Author Affiliations

Optics Letters, Vol. 14, Issue 17, pp. 955-957 (1989)

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We present a simple yet highly sensitive single-beam experimental technique for the determination of both the sign and magnitude of n2. The sample is moved along the z direction of a focused Gaussian beam while the repetitively pulsed laser energy is held fixed. The resultant plot of transmittance through an aperture in the far field yields a dispersion-shaped curve from which n2 is easily calculated. A transmittance change of 1% corresponds to a phase distortion of ≃ λ/250. We demonstrate this method on several materials using both CO2 and Nd:YAG laser pulses.

© 1989 Optical Society of America

Original Manuscript: February 24, 1989
Manuscript Accepted: June 11, 1989
Published: September 1, 1989

M. Sheik-bahae, A. A. Said, and E. W. Van Stryland, "High-sensitivity, single-beam n2 measurements," Opt. Lett. 14, 955-957 (1989)

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