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Wireless and Guided Wave Electromagnetics by Le Nguyen Binh

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9 Fourier Guided Wave Optics

Abbreviations

Term

Full Name

AWG

Array waveguide grating

DWDM

Dense wavelength division multiplexing

PLC

Planar lightwave circuit

GW

Guided wave

DFT or FFT

Discrete/fast Fourier transform

DWT

Discrete wavelet transform

IFFT

Inverse FFT

oFFT

Optical FFT

oDWT

Optical DWT

9.1 Introduction

Photonic signal processing has emerged as one of the most essential techniques in modern optical communication systems beyond 100 Gb/s,16 especially in the intense effort to increase the transmission capacity per wavelength lightwave channel to terabits/s. In order to increase the spectral efficiency defined as the number of bits/s that are accommodated in 1 Hz, advanced modulation formats are employed, such ...

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