Digital Signal Processing Reference
In-Depth Information
Chapter 7
All-Optical Frequency Shifting
Abstract
This chapter provides a theoretical model for pulse propagation inside
an SOI waveguide. The four-wave mixing (FWM) process in SOI waveguides is
discussed with an emphasis on the effects of two-photon absorption and the con-
sequent free-carrier effects. All-optical wavelength conversion and optical signal
processing along with requisite devices are illustrated with examples exclusively.
Keywords
Frequency shifting • All-optical wavelength conversion
Abbreviations
SOI Silicon on insulator
FWM Four-wave mixing
WDM Wavelength division multiplexing
DWDM Dense wavelength division multiplexing
OTDM
Optical time division multiplexing
MZ
Mech-Zehnder
GVD
Group velocity dispersion
OXC
Optical cross-connect
CW
Continuous wave
MEMS
Micro-electromechanical system
TPA
Two-photon absorption
FCA
Free carrier absorption
SPM
Self-phase modulation
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