Data transmission under high scattering based on OAM-basis transmission matrix.

Area of Science:

• Optics and Photonics
• Optical Communication Systems
• Information Theory

Background:

• Orbital angular momentum (OAM) multiplexing enhances optical communication capacity.
• Multiple scattering and signal distortion limit OAM applications in long-distance communication.

Purpose of the Study:

• To propose a data transmission method using an OAM-basis transmission matrix (TM) effective under high scattering conditions.
• To enable robust and high-capacity optical communication by overcoming scattering-induced signal degradation.

Main Methods:

• Encoding OAM modes directly using an OAM-basis TM.
• Acquiring incident OAM mode power spectral distribution from speckle field intensity profiles.
• Implementing a data transmission system capable of handling numerous OAM channels.

Main Results:

• Demonstrated a data transmission method based on OAM-basis TM under high scattering.
• Successfully multiplexed a maximum of 800 OAM modes.
• Achieved a low bit error rate of 0.01% in color image data transmission.

Conclusions:

• The proposed OAM-basis TM method effectively overcomes scattering limitations in optical communication.
• This technique facilitates the multiplexing of a large number of OAM channels with ease of implementation.
• The method shows significant potential for increasing optical communication capacity in challenging environments.