Phase and amplitude beam shaping with two deformable mirrors implementing input plane and Fourier plane phase...

Area of Science:

• Optics
• Optical Engineering
• Image Processing

Background:

• Atmospheric turbulence distorts laser beams, degrading performance in directed-energy and free-space optical communication systems.
• Adaptive optics systems are crucial for compensating these distortions.
• Simultaneous phase and amplitude shaping is highly desirable for advanced adaptive optics.

Purpose of the Study:

• To propose a novel adaptive optics system based on optical image encryption principles.
• To demonstrate simultaneous phase and amplitude shaping of laser beams.
• To validate the system's effectiveness through theoretical analysis, simulation, and experiments.

Main Methods:

• Adapted a known optical image encryption structure.
• Replaced phase plates with deformable mirrors for on-demand phase modulation.
• Utilized a Gaussian beam as input instead of a conventional image.

Main Results:

• The modified encryption system successfully achieved arbitrary phase and amplitude beam shaping.
• Performance was constrained by the deformable mirrors' stroke range and influence function.
• The system demonstrated capabilities in mode conversion and structured light generation.

Conclusions:

• Optical image encryption concepts provide a viable framework for advanced adaptive optics.
• The proposed system offers a flexible solution for laser beam shaping and distortion compensation.
• Applications include directed-energy systems, optical communications, and specialized imaging.