Research On Optical Wavelength Exchange Using A Semiconductor Optical Amplifier Based On Four-wave Mixing

For next generation wavelength-routed optical networks,many technologies,such as(de)multiplexing,add/drop,multicasting,switching,and wavelength exchange are considered to be attractive techniques for enhancing network flexibility and robustness.Wavelength exchange is an important concept for efficiently utilizing network resources and improving network performance.Desirable features of such wavelength exchange would be ultrafast response,transparency to the modulation format,and capability of achieving the exchange function in a single optical element(e.g.a single waveguide).In addition,driven by the trend of large scale integration,it is also highly desirable to perform wavelength exchange using integrable devices.Semiconductor optical amplifier(SOA),due to its merits such as small size,low power and easy integration,is a suitable candidate to achieve data exchange.The paper proposed wavelength exchange based on four-wave mixing(FWM)using a SOA.By exploiting the parametric depletion effect of non-degenerate FWM process and adjusting pump wavelengths and power,optimum parameters are obtained for wavelength exchange.We design and realize the simulation systems for optical wavelength exchange of lOGbps DPSK(NRZ-DPSK)signals and DQPSK(NRZ-DQPSK).At the bit error rate(BER)of 10-9,the power penalty of exchanged DPSK signals is less than 3dB while the penalty of exchanged DPSK signals is less than 4dB,demonstrating wavelength exchange based on non-degenerate FWM using a SOA.