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Real time moire interferometry using a Fabry-Perot cavity with a phase conjugate mirror.

G Indebetouw, K P Lo

|June 18, 2010

Summary

Researchers developed a self-referencing interferometer using a phase conjugate mirror (PCM). This setup allows visualization of wavefront changes by displaying moiré patterns between old and new interferograms due to the PCM

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Published on: April 26, 2014

Area of Science:

Optics and Photonics
Interferometry
Nonlinear Optics

Background:

Fabry-Perot cavities are fundamental optical resonators.
Phase conjugate mirrors (PCMs) offer unique wavefront manipulation capabilities.
Interferometry is crucial for precise optical measurements.

Purpose of the Study:

To introduce a novel self-referencing interferometer design.
To explore the dynamic capabilities of a Fabry-Perot interferometer incorporating a PCM.
To analyze the display of interferometric moiré patterns resulting from wavefront changes.

Main Methods:

Implementation of a Fabry-Perot cavity with a single phase conjugate mirror (PCM).
Generation of the wavefront and its complex conjugate within the cavity.
Utilizing the finite response time of the PCM to capture transient interferograms.

Main Results:

Demonstration of a self-referencing interferometer capable of real-time wavefront analysis.
Observation of moiré patterns between successive interferograms after input wavefront modification.
Analysis of results obtained using a barium titanate (BaTiO3) crystal as the PCM.

Conclusions:

The developed interferometer provides a method for visualizing dynamic wavefront changes.
The finite response time of the PCM is key to observing transient interferometric phenomena.
This technique offers potential for advanced optical sensing and metrology.