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Related Experiment Video

Updated: May 19, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Phase-shifting interferometer using a frequency-tunable diode laser calibrated by an optical frequency comb.

Xuejian Wu1, Jitao Zhang, Haoyun Wei

  • 1State Key Lab of Precision Measurement Technology & Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China. wu-xj09@mails.tsinghua.edu.cn

The Review of Scientific Instruments
|August 3, 2012
PubMed
Summary
This summary is machine-generated.

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A novel phase-shifting interferometer utilizes a frequency-tunable diode laser and optical frequency comb for precise measurements. This system achieves negligible phase measurement uncertainties, enabling highly accurate surface topography analysis.

Area of Science:

  • Metrology
  • Optical Engineering
  • Surface Science

Background:

  • Accurate surface topography measurement is crucial for scientific and industrial applications.
  • Traditional interferometry methods can be limited by laser frequency instability and phase step inaccuracies.

Purpose of the Study:

  • To develop a phase-shifting interferometer with enhanced precision and stability.
  • To minimize uncertainties in phase measurements for improved surface topography analysis.

Main Methods:

  • Utilized a frequency-tunable diode laser calibrated with an optical frequency comb.
  • Implemented the Carré algorithm and frequency control strategies for arbitrary optical frequency synthesis.
  • Employed optical frequency tuning for accurate phase steps.

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Implementation of a Reference Interferometer for Nanodetection
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Published on: April 26, 2014

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Related Experiment Videos

Last Updated: May 19, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Main Results:

  • Achieved a relative laser frequency uncertainty of 5.7 × 10⁻¹² (1 s averaging time, traced to an Rb clock).
  • Demonstrated negligible phase measurement uncertainties from laser frequency and phase steps.
  • Obtained a phase measurement repeatability of λ/200 for standard sphere surface topography measurement.

Conclusions:

  • The developed phase-shifting interferometer offers high precision and stability.
  • This technique significantly reduces measurement uncertainties, making it suitable for demanding metrology applications.
  • Negligible phase measurement uncertainties pave the way for more accurate surface characterization.