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

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Efficient generation of truncated Bessel beams using cylindrical waveguides.

Vladimir S Ilchenko, Makan Mohageg, Anatoliy A Savchenkov

|June 18, 2009

Summary

This study demonstrates efficient conversion between Gaussian and Bessel beams using optical waveguides and resonators. High-order Bessel beams (order 200) were generated with over 10% efficiency.

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Area of Science:

Optics and Photonics
Waveguide Technology
Beam Shaping

Background:

Gaussian beams are fundamental but lack self-reconstruction properties.
Bessel beams offer unique propagation characteristics but are challenging to generate.
Efficient beam conversion is crucial for advanced optical applications.

Purpose of the Study:

To develop an efficient method for converting Gaussian beams into high-order Bessel beams.
To investigate the use of cylindrical optical waveguides and whispering gallery mode resonators for this conversion.
To achieve high conversion efficiency for Bessel beams of significant order.

Main Methods:

Utilized cylindrical optical waveguides as the primary optical element.
Integrated whispering gallery mode resonators to enhance beam generation.
Employed a generator combining waveguides and resonators for beam conversion.

Main Results:

Successfully generated Bessel beams with an order as high as 200.
Achieved a conversion efficiency exceeding 10% for the generated Bessel beams.
Demonstrated the feasibility of the waveguide-resonator system for efficient beam transformation.

Conclusions:

The proposed waveguide-resonator system provides an effective means for efficient Gaussian to Bessel beam conversion.
This method enables the generation of high-order Bessel beams with practical efficiencies.
The findings have implications for applications requiring tailored beam propagation characteristics.