Polarimetric calibrated robust dual-SLM complex-amplitude computer-generated holography

Area of Science:

• Optics and Photonics
• Holography
• Spatial Light Modulation

Background:

• Liquid Crystal on Silicon (LCoS) spatial light modulators (SLMs) are crucial for computer-generated holography (CGH).
• Non-uniform phase modulation in LCoS SLMs leads to intensity fringes and reduced holographic display quality.
• Existing CGH techniques struggle with the inherent imperfections of LCoS devices.

Purpose of the Study:

• To develop a robust dual-SLM complex-amplitude CGH technique.
• To overcome the limitations of non-uniform phase modulation in LCoS SLMs.
• To enhance the accuracy and quality of holographic reconstructions.

Main Methods:

• Proposed a dual-SLM complex-amplitude CGH technique integrating polarimetric and diffractive modes.
• The polarimetric mode linearizes phase modulations of individual SLMs.
• The diffractive mode employs camera-in-the-loop optimization for holographic display refinement.

Main Results:

• Achieved a 21.12% improvement in peak signal-to-noise ratio (PSNR).
• Demonstrated a 50.74% enhancement in structure similarity index measure (SSIM).
• Successfully improved reconstruction accuracy using LCoS SLMs with non-uniform phase profiles.

Conclusions:

• The proposed dual-SLM technique effectively compensates for non-uniform phase modulation in LCoS SLMs.
• This method significantly enhances the fidelity of holographic reconstructions.
• The technique offers a robust solution for high-accuracy complex-amplitude CGH.