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

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Alignment precision of polarization components.

Nathan Hagen, Prathan Buranasiri, Yukitoshi Otani

|December 25, 2019

Summary

This summary is machine-generated.

Achieving high angular precision during optical system alignment is feasible, making postprocessing correction for azimuthal errors unnecessary. This study demonstrates millidegree precision is attainable with standard mounts and an optical signal model.

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Area of Science:

Optical Engineering
Polarization Optics
Metrology

Background:

Postprocessing correction methods for azimuthal alignment errors in optical systems are discussed in recent polarization literature.
Achieving high angular precision during system alignment is often considered challenging, necessitating postprocessing corrections.

Purpose of the Study:

To demonstrate that high angular precision alignment is achievable during system setup, rendering postprocessing correction unnecessary.
To estimate the achievable alignment precision for linear polarizers and waveplates in polarization systems.
To show that an optical signal model can enable alignment precision limited by optical component quality, not mechanical limitations.

Main Methods:

Estimation of alignment precision for linear polarizers and waveplates.
Utilizing an optical signal model for system alignment.
Analysis of precision limitations imposed by optics and detectors versus mechanical components.

Main Results:

High angular precision alignment is achievable during system setup, eliminating the need for postprocessing correction.
Millidegree alignment precision is possible using ordinary rotational mounts.
Alignment precision is primarily limited by the quality of optical components and detectors, not the mechanical setup.

Conclusions:

Postprocessing correction for azimuthal alignment errors is unnecessary when high precision is achieved during initial system alignment.
Advanced alignment techniques utilizing optical signal models allow for unprecedented precision with standard equipment.
The quality of optical elements and detectors dictates the ultimate alignment precision, surpassing mechanical limitations.