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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 73, Iss. 12 — Dec. 1, 1983
  • pp: 1836–1838

Measurements of refractive-index dispersion in gases with a two-wavelength one-path interferometer

D. S. Elliott and J. F. Ward  »View Author Affiliations


JOSA, Vol. 73, Issue 12, pp. 1836-1838 (1983)
http://dx.doi.org/10.1364/JOSA.73.001836


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Abstract

A novel two-wavelength one-path nonlinear interferometer is used to measure refractive-index dispersion for a number of molecular gases. Δn, is measured directly, where Δn = n - nω with ω = 2πc/694 nm. Δn was measured for these gases previously. For CH4, the results are consistent with conventional refractive-index data from the literature; for CHF3, CH3F, CF4, and SF6, these results improve refractive-index data for wavelengths shorter than 400 nm; and, for CH2F2, these results provide the only data on dispersion available to our knowledge.

© 1983 Optical Society of America

Citation
D. S. Elliott and J. F. Ward, "Measurements of refractive-index dispersion in gases with a two-wavelength one-path interferometer," J. Opt. Soc. Am. 73, 1836-1838 (1983)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-73-12-1836


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References

  1. J. F. Ward and D. S. Elliott, "Optical third-harmonic generation in the fluorinated methanes and sulfur hexafluoride," J. Chem. Phys. (to be published).
  2. R. S. Finn and J. F. Ward, "Nonlinear-optical measurement of dispersion in gases," Appl. Opt. 11, 2103–2104 (1972).
  3. G. H. C. New and J. F. Ward, "Optical third-harmonic generation in gases," Phys. Rev. Lett. 19, 556–559 (1967); J. F. Ward and G. H. C. New, "Optical third-harmonic generation in gases by a focused laser beam," Phys. Rev. 185, 57–72 (1969).
  4. J. H. Dymond and E. B. Smith, The Virial Coefficients of Gases (Clarendon, Oxford, 1969).
  5. S. Friberg, as reported in Zahlenwerte und Funktionen, H. H. Landolt and R. Börnstein, ed. (Springer-Verlag, Berlin, 1962), Band II, Teil 8, pp. 6-884, 6-885.
  6. H. E. Watson and K. L. Ramaswamy, "The refractive index dispersion and polarization of gases," Proc. R. Soc. Lond. Ser. A 156, 144–157 (1936).
  7. K. L. Ramaswamy, "Refractive indices and dispersions of gases and vapours," Proc. Ind. Acad. Sci. Sect. 4, 675–686 (1936).
  8. K. L. Ramaswamy, "Refractive indices and dispersions of volatile compounds of fluorine and boron," Proc. Ind. Acad. Sci. Sect. 2, 630–636 (1935).
  9. J. F. Ward and I. J. Bigio, "Molecular second- and third-order polarizabilities from measurements of second-harmonic generation in gases," Phys. Rev. A 11, 60–66 (1975) (the values reported here are from Ref. 2 but have been corrected for the nonideal behavior of the gas); C. K. Miller and J. F. Ward, "Measurements of nonlinear optical polarizabilities for some halogenated methanes: the role of bond-bond interactions," Phys. Rev. A 16, 1179–1185 (1977); J. F. Ward and C. K. Miller, "Measurements of nonlinear optical polarizabilities for twelve small molecules," Phys. Rev. A 19, 826–833 (1979).
  10. Discussion of various dispersion formulas and relations to quantum-mechanical expressions may be found, for example, in C. R. Mansfield and E. R. Peck, "Dispersion of helium," J. Opt. Soc. Am. 59, 199 (1969).
  11. Dupont Freon Tech. Bull. B-32, Freon Refrigerants, (E. I. DuPont de Nemours & Co. Wilmington, Del., 1963).

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