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Mid-infrared electric field characterization using a visible charge-coupled-device-based spectrometer.

Kevin J Kubarych1, Manuel Joffre, Amy Moore

  • 1Centre National de la Recherche Scientifique, Unite Mixte de Recherche 7645, INSERM U 451, Ecole Polytechnique, Ecole Nationale Supérieure de Techniques Avancées, 91128 Palaiseau, France. kevin.kubarych@polytechnique.fr

Optics Letters
|June 11, 2005
PubMed
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We developed a new method to measure ultrashort mid-infrared pulses by converting them to the visible spectrum. This technique uses readily available equipment for precise electric field reconstruction.

Area of Science:

  • * Ultrafast optics and nonlinear spectroscopy.
  • * Advanced optical pulse characterization techniques.

Background:

  • * Characterizing ultrashort mid-infrared (MIR) pulses is crucial for various scientific applications.
  • * Conventional methods often require specialized and expensive infrared detectors.

Purpose of the Study:

  • * To develop a general and accessible method for ultrashort MIR pulse characterization.
  • * To enable direct electric field reconstruction of MIR pulses using standard visible-light instrumentation.

Main Methods:

  • * Employing upconversion of stretched MIR pulses from a chirped-pulse amplifier.
  • * Translating the MIR power spectrum into the visible region for measurement.
  • * Utilizing a variant of zero-added-phase spectral phase interferometry for spectral phase characterization.

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Main Results:

  • * Successful characterization of ultrashort MIR pulses demonstrated.
  • * The method allows for readily measuring the power spectrum with a silicon CCD camera.
  • * Spectral phase information is accurately retrieved for electric field reconstruction.

Conclusions:

  • * This upconversion-based method offers a cost-effective and versatile alternative for MIR pulse characterization.
  • * It provides a multiplex advantage over traditional infrared detector-based approaches.
  • * The technique facilitates precise electric field reconstruction, advancing ultrafast spectroscopy.