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Versatile second-harmonic interferometer with high temporal resolution and high sensitivity based on a

Fernando Brandi1, Francesco Giammanco

  • 1University of Pisa, Physics Department, Largo B. Pontecorvo 3, 56127-Pisa, Italy. brandi@df.unipi.it

Optics Letters
|August 19, 2007
PubMed
Summary

This study introduces a versatile second-harmonic interferometer using a CW Nd:YAG laser. The device accurately measures dispersion, achieving high temporal resolution and sensitivity for various laser powers.

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Area of Science:

  • Optics and Photonics
  • Laser Interferometry
  • Nonlinear Optics

Background:

  • Interferometry is crucial for precise optical measurements.
  • Second-harmonic generation offers unique wavelengths for probing materials.
  • Nd:YAG lasers provide a stable, high-power source for nonlinear optics.

Purpose of the Study:

  • To present a novel second-harmonic interferometer.
  • To demonstrate its capability in measuring line-integrated dispersion.
  • To evaluate its performance across different laser power levels.

Main Methods:

  • Utilized a continuous-wave (CW) Nd:YAG laser source.
  • Implemented a second-harmonic generation setup.
  • Designed an interferometer to measure dispersion at fundamental and second-harmonic wavelengths.

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Related Experiment Videos

Last Updated: Jul 13, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Main Results:

  • Achieved a temporal resolution of 1.25 microseconds with 1.3 mrad sensitivity at 0.6 W laser power.
  • Demonstrated a temporal resolution of 10 microseconds with 0.3 mrad sensitivity at 0.6 W laser power.
  • Reported a temporal resolution of 10 microseconds with 1 mrad sensitivity at 150 mW laser power.

Conclusions:

  • The developed second-harmonic interferometer is a versatile tool for dispersion measurement.
  • The device exhibits excellent sensitivity and temporal resolution.
  • Its performance is effective even at lower laser power levels.