All Optical Signal-Processing Techniques Utilizing Four Wave Mixing

Abstract

Four Wave Mixing (FWM) based optical signal-processing techniques are reviewed. The use of FWM in arithmetical operation like subtraction, wavelength conversion and pattern recognition are three key parts discussed in this paper after a brief introduction on FWM and its comparison with other nonlinear mixings. Two different approaches to achieve correlation are discussed, as well as a novel technique to realize all optical subtraction of two optical signals.

Keywords

• four wave mixing (FWM)
• optical signal processing
• wavelength conversion
• wavelength regeneration
• pattern recognition
• frequency measurement