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Generating superimposed Bessel beams with a volume holographic axicon
Applied Optics
|October 20, 2017
Summary
Researchers generated Quasi-Bessel beams (QBBs) and stored them as holograms. Reconstructing these holograms produced tunable superimposed Bessel beams (SBBs) with oscillating cores, demonstrating a new method for optical beam control.
Area of Science:
- Optics and Photonics
- Holography
- Beam Shaping
Background:
- Quasi-Bessel beams (QBBs) are non-diffracting beams with unique propagation characteristics.
- Controlling the properties of light beams is crucial for various optical applications.
Purpose of the Study:
- To generate and store Quasi-Bessel beams (QBBs) using an axicon-telescope system.
- To reconstruct QBB holograms to produce tunable superimposed Bessel beams (SBBs) with oscillating cores.
- To demonstrate the tunability of SBB periodicity through optical element rearrangement.
Main Methods:
- Generation of QBBs with varying profiles using an axicon-telescope system with adjustable distance (δ).
- Storage of QBBs as volume holograms in a photorefractive crystal.
- Reconstruction and focusing of holographic QBBs by the recording axicon to form SBBs.
Main Results:
- Beam profiles of QBBs were observed to change with the axicon-telescope distance δ.
- Reconstructed SBBs exhibited oscillating cores with tunable periods ranging from 4.3 to 6.1 cm.
- The periodicity of SBBs was found to be dependent on the distance δ.
Conclusions:
- A novel method for generating tunable superimposed Bessel beams (SBBs) with oscillating cores was successfully demonstrated.
- The tunability of SBB periodicity is achieved by simple adjustments in the optical setup, offering a practical approach for beam control.
