Hybrid coding method of multiple orbital angular momentum states based on the inherent orthogonality

Area of Science:

• Optics and Photonics
• Information Theory
• Quantum Information

Background:

• Orbital Angular Momentum (OAM) offers unique properties for optical communications.
• Current coding methods for OAM states face limitations in efficiency and flexibility.
• Developing advanced modulation techniques is crucial for next-generation optical networks.

Purpose of the Study:

• To propose a hybrid coding method for multiple OAM states leveraging inherent orthogonality.
• To enhance coding efficiency in optical communication systems.
• To demonstrate the adaptability of OAM modes to other transverse modes.

Main Methods:

• Theoretical analysis of a novel hybrid coding scheme for OAM states.
• Implementation of a concentric ring resonator array for encoding hybrid OAM states.
• Design of a digital device and phase hologram for decoding OAM states.

Main Results:

• The proposed hybrid coding method significantly improves coding efficiency over conventional approaches.
• Demonstrated the extension of OAM modes to Bessel beams and Laguerre-Gauss modes.
• Presented a practical scheme for encoding and decoding hybrid OAM states.

Conclusions:

• The hybrid coding method offers a substantial advancement in OAM-based optical communication.
• The approach provides enhanced flexibility and efficiency for optical data transmission.
• This work paves the way for more robust and high-capacity optical information processing.