Secure space division multiplexing system based on multi-channel chaos random encryption with synchronized...

Area of Science:

• Optical Communications
• Quantum Cryptography
• Photonics

Background:

• Physical layer security is crucial for secure communication networks.
• Chaotic optical communication offers a promising approach for enhanced security.
• Space-division-multiplexing (SDM) increases fiber optic communication capacity.

Purpose of the Study:

• To propose and demonstrate a secure SDM system using multi-channel chaos encryption.
• To leverage remotely synchronized Fabry-Perot (FP) lasers for secure data transmission.
• To enhance both the security and capacity of optical communication systems.

Main Methods:

• Utilizing multi-longitudinal modes from FP lasers to generate low-correlated chaotic signals.
• Implementing random en/decryption of confidential data using these chaotic signals.
• Demonstrating the scheme in a multi-core fiber-based SDM system.

Main Results:

• Successfully encrypted and transmitted 28 Gb/s/core on-off keying (OOK) and 64 Gb/s/core quadrature phase-shift keying (QPSK) signals.
• Achieved secure transmission over a 10 km seven-core fiber.
• Demonstrated multiple encryption possibilities from a single chaotic laser source.

Conclusions:

• The proposed scheme provides a novel method for physical-layer secure SDM.
• The system offers enhanced capacity and security for optical communication.
• This approach paves the way for more secure and high-capacity fiber optic networks.