40-Gbitys cascadable all-optical logic with an ultrafast nonlinear interferometer

Area of Science:

• Photonics and Optical Communications
• Semiconductor Device Physics
• Nonlinear Optics

Background:

• High-speed optical signal processing is crucial for next-generation communication networks.
• Existing methods for all-optical switching often face limitations in speed, cascadability, or functionality.
• Semiconductor optical amplifiers offer potential for fast all-optical switching due to their nonlinear properties.

Purpose of the Study:

• To demonstrate a novel all-optical device for high-rate bitwise inversion and wavelength conversion.
• To investigate the use of optically induced nonlinearities in semiconductor amplifiers for ultrafast switching.
• To showcase the device's versatility by configuring it for logic gating operations.

Main Methods:

• Utilized an ultrafast nonlinear interferometer architecture.
• Employed a semiconductor amplifier exhibiting optically induced gain and index nonlinearities.
• Tested the device for bitwise inversion and wavelength conversion at 40 Gb/s.
• Demonstrated 10 Gb/s OR and NOR logic gating functionalities.

Main Results:

• Successfully achieved all-optical bitwise inversion at 40 Gb/s.
• Demonstrated all-optical wavelength conversion at 40 Gb/s.
• Confirmed the cascadability of the nonlinear interferometer.
• Presented 10 Gb/s OR and NOR logic gate operations.

Conclusions:

• The ultrafast nonlinear interferometer is a viable platform for high-speed all-optical signal processing.
• Optically induced nonlinearities in semiconductor amplifiers enable efficient and fast all-optical switching.
• The device's cascadability and reconfigurability offer flexibility for various optical switching and logic functions.