32 Gb/s physical-layer secure optical communication over 200 km based on temporal dispersion and self-feedback phase...

Area of Science:

• Optical Communications
• Physical Layer Security
• Information Security

Background:

• Physical layer security in fiber-optic systems is a significant global challenge.
• Existing methods often face limitations in speed and distance.

Purpose of the Study:

• To propose and demonstrate a pure hardware optical encryption scheme.
• To achieve high-speed and long-distance secure optical communication.

Main Methods:

• Utilizing temporal spreading and self-feedback phase encryption.
• Implementing a pure hardware optical encryption solution.
• Transmitting a 32 Gb/s confidential signal over a 200 km fiber link.

Main Results:

• Achieved a record bit-rate-distance product of 6400 Gb/s km.
• Successfully demonstrated secure transmission of a high-speed optical signal.
• Validated the effectiveness of the proposed encryption scheme.

Conclusions:

• The developed scheme offers a promising solution for ultra-high-speed physical-layer secure optical communication.
• The system is compatible with existing optical infrastructure and can be pluggable.
• This work paves the way for future advancements in secure optical networks.