
6
Ultra-high-speed OTDM transmission
technology
Hans-Georg Weber and Reinhold Ludwig
Fraunhofer Institute for Telecommunications, Heinrich-Hertz-
Institut, Einsteinufer 37, Berlin, Germany
6.1 INTRODUCTION
The expected increase of transmission capac ity in optical fiber networks presents
us with many technology challenges [1]. One of these challenges is an optimized
combination of wavelength -division multiplexing (WDM) and time-division mul-
tiplexing (TDM). TDM may be realized by electrical multiplexing (ETDM) or by
optical multiplexing (OTDM) to a high-speed data signal, i.e., by electrical signal
processing or optical signal processing. Presently,