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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Model-based far-field alignment algorithm for Gaussian beamlike single-mode optical devices.

Yves St-Amant¹, Daniel Gariépy, Denis Rancourt

¹Mechanical Engineering Department, Université Laval, Québec, Quebec, Canada. yves.st-amant@gmc.ulaval.ca

|April 7, 2007

Summary

This study introduces a novel model-based approach for automated fiber optic alignment, identifying optical power characteristics to estimate misalignments. This method offers a new way to improve device-to-fiber coupling efficiency.

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Area of Science:

Optics and Photonics
Optical Engineering
Fiber Optics Communications

Background:

Automated single-mode device-to-fiber alignment typically relies on classical mathematical optimization.
Existing methods can be complex and computationally intensive.

Purpose of the Study:

To present a novel model-based approach for automated fiber optic alignment.
To estimate residual axial, transverse, and angular misalignments using intrinsic optical power characteristics.

Main Methods:

Developed a model-based approach leveraging the physical nature of optical coupling.
Utilized identification of intrinsic characteristics of coupled optical power.
Estimated misalignments in the far field.

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Main Results:

The proposed model-based approach was experimentally validated.
The method accurately estimated axial, transverse, and angular misalignments.
Demonstrated successful alignment using two single-mode fibers as emitter and receiver.

Conclusions:

The new alignment approach can complement or replace existing automated methods.
This method offers a physically grounded alternative for device-to-fiber alignment.
Validated experimental results confirm the efficacy of the model-based approach.