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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 32, Iss. 36 — Dec. 20, 1993
  • pp: 7434–7441

Measurement method of nonresonant third-order susceptibility by using off-resonant coherent anti-Stokes Raman spectroscopy

Kazuhiro Akihama, Takeshi Asai, and Satoshi Yamazaki  »View Author Affiliations


Applied Optics, Vol. 32, Issue 36, pp. 7434-7441 (1993)
http://dx.doi.org/10.1364/AO.32.007434


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Abstract

Nonresonant third-order susceptibilities (χnr) of N2 and Ar gases by using an off-resonant coherent anti-Stokes Raman spectroscopy of the N2Q branch, whose spectral profile is highly sensitive to the value of χnr, have been measured to demonstrate the possibility of the present method. The χnr of N2 and Ar using the off-resonant coherent anti-Stokes Raman spectroscopy were 8.4 ± 0.2 and 9.7 ± 0.8 (× 10−18 cm3/erg/amagat), respectively. These values are in good agreement with those of previous studies. The off-resonant spectra were theoretically calculated by using the Raman linewidth given by a modified exponential gap model, and they were compared with the experimental ones to determine χnr. The effects of uncertainties of the Raman linewidth of the N2Q branch on the determination of χnr were investigated by changing the parameters in the modified exponential gap model. The determined χnr value changed by only 0.05% with 50% change of the Raman linewidth. The potential advantages of this method are no requirements of high spectral resolution measurements, no accurate Raman linewidth data for each experimental condition, and no optical delay between pump beams.

© 1993 Optical Society of America

History
Original Manuscript: July 7, 1992
Published: December 20, 1993

Citation
Kazuhiro Akihama, Takeshi Asai, and Satoshi Yamazaki, "Measurement method of nonresonant third-order susceptibility by using off-resonant coherent anti-Stokes Raman spectroscopy," Appl. Opt. 32, 7434-7441 (1993)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-32-36-7434

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