All optical discrete Fourier transform processor for 100 Gbps OFDM transmission

Area of Science:

• Optoelectronics and Photonics
• Optical Communications Engineering
• Signal Processing

Background:

• High-speed optical communication systems require efficient methods for generating complex modulation formats.
• Optical orthogonal frequency division multiplex (OFDM) offers advantages in spectral efficiency and dispersion tolerance.
• All-optical signal processing is crucial for overcoming electronic bottlenecks in high-speed data transmission.

Purpose of the Study:

• To propose and investigate a novel all-optical discrete Fourier transform (DFT) method for generating optical OFDM symbols.
• To evaluate the transmission performance of the proposed all-optical OFDM symbol generation technique at 100 Gbps.
• To compare the performance of a 4x25 Gbps all-optical OFDM system with a 100 Gbps single-channel return-to-zero system.

Main Methods:

• Development of an all-optical DFT architecture for OFDM symbol generation.
• Implementation of a 4x25 Gbps optical OFDM transmission system utilizing the all-optical DFT.
• Performance analysis through simulations and comparison with a conventional 100 Gbps single-channel system in an optically amplified environment.

Main Results:

• Successful generation of optical OFDM symbols using all-optical DFT.
• Demonstration of 100 Gbps transmission capability with the proposed method.
• Comparable transmission performance between the 4x25 Gbps all-optical OFDM system and the 100 Gbps single-channel system.

Conclusions:

• All-optical DFT is a viable technique for generating optical OFDM symbols, enabling high-speed optical communication.
• The proposed method offers a promising alternative for future high-capacity optical networks.
• Further research can explore scalability and integration into existing optical infrastructure.