Analysis of optical vortices with suppressed sidelobes using modified Bessel-like function and trapezoid annulus...

Area of Science:

• Optics and Photonics
• Applied Physics

Background:

• Optical vortices are crucial for applications like optical manipulation and communication.
• Suppressing sidelobes in optical vortices is essential for improving signal quality and efficiency.
• Conventional annulus structures and modified Bessel-like functions have limitations in modulation and efficiency.

Purpose of the Study:

• To investigate two novel amplitude modulation methods for suppressing sidelobes in optical vortices.
• To introduce a modified Bessel-like function modulation structure with adjustable parameters.
• To propose a trapezoid annulus structure as a hybrid approach combining advantages of existing methods.

Main Methods:

• Developing a modified Bessel-like function modulation structure where the order of the Bessel-like function is an additional parameter.
• Introducing new Bessel-like modulation functions to enhance diffraction efficiency.
• Designing a trapezoid annulus structure as a compromise between modified Bessel-like and conventional annulus structures.

Main Results:

• Both proposed methods effectively suppress sidelobes, producing high-quality optical vortices.
• The modified Bessel-like function approach allows for flexible modulation of diffraction patterns.
• The trapezoid annulus structure demonstrates advantages of both modified Bessel-like and conventional annulus structures.
• The developed structures are applicable for producing optical vortices with a wide range of topological charges.

Conclusions:

• The modified Bessel-like function modulation structure and trapezoid annulus structure are effective for generating high-quality optical vortices with suppressed sidelobes.
• These structures offer increased flexibility and applicability for producing optical vortices with diverse topological charges.
• The proposed methods simplify the design procedure for optical vortex generation, showing significant potential for optical communication and manipulation.