Research Progress on Router Devices for the OAM Optical Communication

Area of Science:

• Optics and Photonics
• Optical Communications
• Information Theory

Background:

• Vortex beams with orbital angular momentum (OAM) offer a new degree of freedom for light waves.
• OAM's orthogonal states can overcome limitations in information capacity.
• OAM router devices (OAM-RDs) are crucial for advancing OAM optical communication technology.

Purpose of the Study:

• To review major breakthroughs in OAM router devices (OAM-RDs).
• To examine the current technological standing of OAM-RDs.
• To categorize and analyze recent techniques related to OAM-RDs.

Main Methods:

• Categorization of recent OAM-RD techniques into five areas: multicasting, switching, filtering, hopping, and adding/extracting.
• In-depth discussion of principles, research methods, advantages, and disadvantages for each technique.
• Analysis of future development trends and prospects for OAM-RDs.

Main Results:

• Summary of significant advancements in OAM-RDs.
• Examination of the latest technological status in the field.
• Detailed review of techniques for channel multicasting, switching, filtering, hopping, and adding/extracting.
• Comparative analysis of different OAM-RD approaches.

Conclusions:

• OAM-RDs are vital for enhancing the flexibility and practicality of optical communication systems.
• The review provides a comprehensive overview of current OAM-RD technologies and their applications.
• Future prospects for OAM-RDs indicate continued growth and innovation in optical communication.