All-optical virtual private network and ONUs communication in optical OFDM-based PON system

Area of Science:

• Optical Communications
• Network Engineering
• Information Security

Background:

• Passive Optical Networks (PONs) are crucial for broadband access.
• Existing PONs face challenges in providing secure and flexible virtual private networks (VPNs).
• Optical Orthogonal Frequency-Division Multiplexing (OFDM) offers high bandwidth potential.

Purpose of the Study:

• To propose and demonstrate a novel all-optical VPN scheme for OFDM-PON systems.
• To enable secure and flexible inter-Optical Network Unit (ONU) communications within OFDM-PONs.
• To investigate both intra-VPN and inter-VPN communication scenarios.

Main Methods:

• Utilizing subcarrier band allocation within an OFDM-PON system.
• Implementing an all-optical approach for VPN and ONU inter-communications.
• Demonstrating the scheme at 10-Gbit/s using 16-Quadrature Amplitude Modulation (16 QAM).

Main Results:

• Successful demonstration of all-optical VPN and inter-ONU communications.
• Achieved 10-Gbit/s data rates with 16 QAM.
• The proposed scheme offers enhanced security and flexibility compared to WDM-PON and TDM-PON.

Conclusions:

• The novel subcarrier allocation scheme is feasible for all-optical VPNs in OFDM-PONs.
• The system provides a secure and flexible platform for intra- and inter-group ONU communications.
• This approach advances the capabilities of passive optical networks.