Generating bona fide twisted Gaussian Schell-model beams.

Area of Science:

• Optics and Photonics
• Laser Physics
• Beam Propagation

Background:

• Gaussian Schell-model (GSM) beams are widely used in optical systems.
• Generating twisted GSM (TGSM) beams with controlled properties is challenging.
• Previous methods for TGSM beam generation had limitations in controlling beam characteristics.

Purpose of the Study:

• To experimentally realize bona fide twisted Gaussian Schell-model (TGSM) beams.
• To develop a new, efficient method for generating TGSM beams.
• To demonstrate explicit control over anisotropic GSM beams before conversion to TGSM beams.

Main Methods:

• Conversion of anisotropic GSM beams into TGSM beams.
• Utilizing a set of three cylindrical lenses for beam transformation.
• Simultaneous control of beam widths and transverse coherence lengths in orthogonal directions.

Main Results:

• Successful experimental realization of bona fide TGSM beams.
• Generation of anisotropic GSM beams with independently controlled parameters.
• Demonstration of a simpler and more controllable TGSM beam generation technique.

Conclusions:

• The proposed method provides a robust way to generate TGSM beams.
• This technique offers enhanced control over beam parameters compared to prior methods.
• The findings contribute to advancements in optical beam shaping and manipulation.