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Phase front retrieval and correction of Bessel beams
Optics Express
|April 27, 2022
Summary
Researchers developed a method to correct aberrations in Bessel beams using only intensity measurements. This technique allows for wavefront and intensity profile correction with a deformable mirror, improving beam quality.
Area of Science:
- Optics and Photonics
- Wave Phenomena
Background:
- Bessel beams are crucial for applications requiring non-diffracting light propagation.
- Non-ideal axicons introduce aberrations, degrading Bessel beam quality and limiting applications.
Purpose of the Study:
- To introduce a novel method for retrieving Bessel beam complex amplitude from intensity data.
- To demonstrate wavefront and intensity profile correction of aberrated Bessel beams.
Main Methods:
- Utilizing intensity measurements to reconstruct the complex amplitude of Bessel beams.
- Employing a deformable mirror for real-time wavefront correction.
- Implementing an iterative algorithm for amplitude retrieval.
Main Results:
- Successfully retrieved the complex amplitude of Bessel beams from intensity profiles.
- Demonstrated significant correction of wavefront aberrations.
- Restored the desired intensity profile of the Bessel beam.
Conclusions:
- The proposed method effectively corrects aberrations in Bessel beams generated by non-ideal axicons.
- This technique offers a practical approach for enhancing Bessel beam quality for advanced applications.
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