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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 1, Iss. 3 — Aug. 4, 1997
  • pp: 73–76

Low frequency Raman gain measurements using chirped pulses

Arthur Dogariu and David J. Hagan  »View Author Affiliations

Optics Express, Vol. 1, Issue 3, pp. 73-76 (1997)

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Two-beam coupling, attributed to Raman gain, is observed in dielectrics using chirped femtosecond pulses. A time resolved pump-probe geometry is used to vary the frequency difference between pulses in the terahertz frequency band. Stimulated Raman scattering couples the pulses transferring energy from the higher to the lower frequency beam, resulting in a dispersion shaped curve as a function of the temporal delay, dependent on the product of the pump and probe irradiances. The observed signal gives the Raman gain in SiO2 and PbF2 for detunings up to 10 THz (approximately 300 cm-1) using mm-thick samples. This method may also be sensitive to the electronic motion responsible for bound-electronic nonlinear refractive index, which could yield the optical response time of bound electrons.

© Optical Society of America

OCIS Codes
(060.7140) Fiber optics and optical communications : Ultrafast processes in fibers
(190.5650) Nonlinear optics : Raman effect
(190.5890) Nonlinear optics : Scattering, stimulated
(190.7070) Nonlinear optics : Two-wave mixing
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Research Papers

Original Manuscript: July 7, 1997
Revised Manuscript: July 3, 1997
Published: August 4, 1997

Arthur Dogariu and David Hagan, "Low frequency Raman gain measurements using chirped pulses," Opt. Express 1, 73-76 (1997)

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