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Mixing partially coherent fields with gaussian irradiance profiles; optimization criteria.

Applied optics·2010

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Mixing inhomogeneous, partially coherent optical fields.

|January 15, 2010

Summary

This summary is machine-generated.

This study introduces a phase-quadrature description for random optical fields, enhancing optical heterodyne analysis. The new method reveals coherence suppression and broadens the field of view, aligning with experimental data.

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Area of Science:

Optics and Photonics
Quantum Optics
Signal Processing

Background:

Traditional logamplitude-phase representation limits optical heterodyne analysis.
Inhomogeneous and partially coherent fields pose challenges for signal-to-noise ratio calculations.

Purpose of the Study:

To introduce a phase-quadrature (p-q) description for random optical fields.
To investigate optical heterodyne behavior with inhomogeneous and partially coherent fields.
To analyze the signal-to-noise ratio and associated phenomena.

Main Methods:

Development of an expression for average signal-to-noise ratio using the p-q representation.
Analysis of the signal-to-noise ratio expression to identify underlying effects.
Theoretical examination of field of view broadening due to spatial coherence.

Main Results:

The p-q representation provides insights into optical heterodyne behavior.
Saturation effects and coherence suppression phenomena are explained.
Weak spatial coherence in signal or local oscillator fields can drastically broaden the heterodyne's field of view.

Conclusions:

The phase-quadrature description is a powerful tool for analyzing optical heterodyne systems.
The findings explain previously observed experimental phenomena and offer new possibilities for system design.
Theoretical predictions show excellent agreement with recent experimental data.