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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 12 — Jun. 6, 2011
  • pp: 11290–11298

An alternative differential method of femtosecond pump-probe examination of materials

R. Ivanov, Jesús Villa, Ismael de la Rosa, and E. Marín  »View Author Affiliations

Optics Express, Vol. 19, Issue 12, pp. 11290-11298 (2011)

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We describe an alternative method for femtosecond pump-probe beam examination of energy transport properties of materials. All already reported techniques have several drawbacks which limit precise measurements of reflection coefficient as function of time. A typical problem is present when rough samples are being studied. In this case the pump-beam polarization changes randomly which may produce a spurious signal, drastically reducing the signal to noise ratio. Some proposals to alleviate such problem have been reported, however, they have not been totally satisfactory. The method presented here consists on measuring the difference between the two delays’ signals of the probe-beam. As will be explained, our proposal is free of typical drawbacks. We also propose a numerical method to recover the ΔR(t)/R curve from the measured data. Numerical simulations show that our proposal is a viable alternative.

© 2011 OSA

OCIS Codes
(120.5700) Instrumentation, measurement, and metrology : Reflection
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7100) Ultrafast optics : Ultrafast measurements
(260.7120) Physical optics : Ultrafast phenomena

ToC Category:
Ultrafast Optics

Original Manuscript: April 15, 2011
Revised Manuscript: May 17, 2011
Manuscript Accepted: May 19, 2011
Published: May 25, 2011

R. Ivanov, Jesús Villa, Ismael de la Rosa, and E. Marín, "An alternative differential method of femtosecond pump-probe examination of materials," Opt. Express 19, 11290-11298 (2011)

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