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Related Experiment Video

Updated: Jun 12, 2026

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

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Phase noise elimination in interferometric experiments by sawtooth phase modulation.

M De Maziere, C Sierens

|June 22, 2010

Summary

A new technique eliminates phase sensitivity in interferometric measurements using sawtooth phase modulation and double phase detection. This method improves upon previous approaches, particularly for time-resolved stimulated Raman gain measurements.

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Last Updated: Jun 12, 2026

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

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Area of Science:

Optical Physics
Spectroscopy
Metrology

Background:

Interferometric measurements are susceptible to phase sensitivity.
Previous methods, like RMS detection, had limitations due to background transmission.
Time-resolved stimulated Raman gain measurements require precise phase handling.

Purpose of the Study:

To develop a technique for eliminating phase sensitivity in interferometric measurements.
To overcome background transmission limitations in interferometry.
To apply the technique to time-resolved stimulated Raman gain measurements.

Main Methods:

Implementation of sawtooth phase modulation of the signal.
Utilization of double phase sensitive detection.
Application in time-resolved stimulated Raman gain spectroscopy.

Main Results:

Successful elimination of phase sensitivity in interferometric measurements.
Overcoming restrictions imposed by background transmission.
Demonstrated effectiveness in time-resolved stimulated Raman gain experiments.

Conclusions:

The developed technique effectively removes phase sensitivity.
This method offers an advantage over prior techniques, especially in the presence of background noise.
The technique is suitable for advanced spectroscopic applications like time-resolved stimulated Raman gain.