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

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Simultaneous polarization Mirau interferometer based on pixelated polarization camera.

Daodang Wang, Rongguang Liang

|December 24, 2015

Summary

This summary is machine-generated.

We developed a novel polarization Mirau interferometer for simultaneous phase-shifted interferogram acquisition. This system achieves high-precision, instantaneous measurements, minimizing environmental disturbances for accurate optical analysis.

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Area of Science:

Optical Metrology
Interferometry
Polarization Optics

Background:

Traditional interferometers often require mechanical scanning, limiting measurement speed and susceptibility to environmental vibrations.
Simultaneous acquisition of phase-shifted interferograms is crucial for real-time, high-precision optical measurements.

Purpose of the Study:

To propose and validate a polarization Mirau interferometer capable of acquiring four phase-shifted interferograms simultaneously.
To achieve motionless phase shift and enhance fringe contrast for improved measurement accuracy.

Main Methods:

Utilizing a pixelated polarization camera for simultaneous interferogram capture.
Employing a wire-grid polarizer as a polarization beam splitter for adjustable fringe contrast.
Implementing a calibration method using superposition of exchanged beams to ensure uniform fringe contrast.

Main Results:

Demonstrated experimental accuracy better than 1/500 wavelength.
Achieved simultaneous acquisition of four phase-shifted interferograms.
Successfully calibrated for uniform fringe contrast despite limitations of the wire-grid polarizer.

Conclusions:

The proposed polarization Mirau interferometer enables instantaneous measurements with reduced environmental disturbance.
This system offers a feasible and accurate approach for high-precision optical metrology.
The developed calibration method effectively overcomes challenges in fringe contrast for polarization-based interferometry.