Design of 10Gbps optical encoder/decoder structure for FE-OCDMA system using SOA and opto-VLSI processors

Area of Science:

• Photonics and Optical Communications
• Information Technology

Background:

• Optical Code Division Multiple Access (OCDMA) systems offer enhanced security and capacity.
• Existing OCDMA systems face challenges in reconfigurability and scalability.

Purpose of the Study:

• To propose and demonstrate a reconfigurable 10Gbps frequency-encoded (1D) encoder/decoder for OCDMA.
• To utilize a single semiconductor optical amplifier (SOA) and Opto-VLSI processor for efficient codeword generation and retrieval.

Main Methods:

• Broadband amplified spontaneous emission generated by an SOA.
• Dynamic wavelength slicing using digital phase holograms on a 1D reflective Opto-VLSI processor.
• Matched digital phase holograms at the encoder and decoder for signal retrieval.

Main Results:

• Successful experimental demonstration of a reconfigurable 1D encoder/decoder structure.
• Generation of 1D codewords through dynamic spectral slicing.
• Verification of system performance using auto-correlation, cross-correlation, and eye diagrams.

Conclusions:

• The proposed Opto-VLSI based OCDMA system provides a reconfigurable and efficient solution.
• The use of a single SOA and Opto-VLSI processor simplifies the system architecture.
• The demonstrated system shows promise for future high-speed optical networks.