Encoding information using Laguerre Gaussian modes over free space turbulence media

Area of Science:

• Optics and Photonics
• Optical Communications
• Information Theory

Background:

• Spatial division multiplexing (SDM) is crucial for increasing optical communication capacity.
• Laguerre Gaussian (LG) modes offer unique properties for encoding information in optical beams.
• Existing methods for LG mode manipulation and detection face challenges in fidelity and efficiency.

Purpose of the Study:

• To experimentally demonstrate an efficient information transmission technique utilizing multiplexed Laguerre Gaussian (LG) modes.
• To investigate the robustness of this technique against atmospheric turbulence.
• To assess the potential of LG modes for high-bit-rate spatial multiplexing in optical systems.

Main Methods:

• Multiplexing and demultiplexing of multiple LG modes with distinct azimuthal and radial indices.
• Utilizing a complete decomposition method for high-fidelity mode extraction at the receiver.
• Experimental simulation of atmospheric turbulence effects on the transmitted LG modes.

Main Results:

• Successful demonstration of efficient information transmission using multiplexed LG modes.
• High fidelity extraction of encoded information achieved through complete mode decomposition.
• Quantification of the impact of atmospheric turbulence on the communication system's performance.

Conclusions:

• The proposed technique offers a promising approach for high-bit-rate spatial division multiplexing.
• LG modes are effective for robust information transmission in optical fiber and free-space communication.
• The system shows resilience to atmospheric turbulence, enhancing its practical applicability.