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Linear and nonlinear frequency- and time-domain spectroscopy with multiple frequency combs.

Kochise Bennett1, Jeremy R Rouxel1, Shaul Mukamel1

  • 1Chemistry Department and Physics and Astronomy Department, University of California, Irvine, California 92697-2025, USA.

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|September 10, 2017
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Summary
This summary is machine-generated.

Two techniques using optical frequency combs and ultrafast laser pulses enable real-time measurement of material properties. These methods map high optical frequencies to detectable low frequencies, advancing spectroscopy and metrology.

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Area of Science:

  • Quantum Optics
  • Spectroscopy
  • Metrology

Background:

  • Phase-stable optical frequency combs offer precise frequency spikes for sampling material responses.
  • Dual comb techniques down-convert optical signals to microwave frequencies for real-time detection.

Purpose of the Study:

  • To compare two techniques for real-time measurement of optical signals.
  • To extend dual comb spectroscopy to multidimensional analysis.
  • To investigate ultrafast laser pulse sequences for nonlinear susceptibility recovery.

Main Methods:

  • Utilizing multiple optical frequency combs with slightly different repetition rates.
  • Employing sequences of ultrafast mode-locked laser pulses with photo-acoustic modulation.

Main Results:

  • Demonstrated extension of the one-dimensional dual comb technique to multiple dimensions.
  • Showcased rapid acquisition of nonlinear susceptibilities using the multi-comb approach.
  • Established the equivalence of ultrafast pulse techniques to multi-dimensional dual comb spectroscopy.

Conclusions:

  • Both optical frequency comb and ultrafast laser pulse techniques provide real-time detection of material properties.
  • Multidimensional dual comb spectroscopy accelerates the acquisition of nonlinear susceptibilities.
  • The studied techniques offer powerful tools for advanced spectroscopy and metrology.