Title :
OTDM transmitter using WDM-TDM conversion with an electroabsorption wavelength converter
Author :
Hayashi, Michiaki ; Tanaka, Hideaki ; Ohara, Kazuho ; Otani, Tomohiro ; Suzuki, Masatoshi
Author_Institution :
Opt. Network Lab., KDDI R&D Labs., Saitama, Japan
fDate :
2/1/2002 12:00:00 AM
Abstract :
An all-optical multiplexing technique using wavelength division multiplexing (WDM)-time division multiplexing (TDM) conversion with an electroabsorption wavelength converter has been proposed and demonstrated. The effectiveness of this WDM-TDM conversion technique for various pulsewidth settings was experimentally investigated. The fluctuation of the signal performance, which was inevitably caused by the coherent crosstalk between adjacent pulses in the conventional optical time division multiplexing (OTDM) technique, were successfully suppressed, even in the case of wide pulse duration. High Q-factor performance has been maintained for a wide range of duty ration from 36% to 74%. By introducing this technique to the optical time division multiplexer, a highly stable and high-quality 40-Gb/s optical signal can be effectively produced without generating the short pulse or setting two tributaries at orthogonal polarization states, and without introducing high-speed electronics for signal multiplexing. The WDM-TDM conversion with an electroabsorption wavelength converter was extended to 60-Gb/s operation by using three 20-Gb/s tributaries. A clear eye opening was confirmed for a waveform after the WDM-TDM conversion of the 60-Gb/s signal
Keywords :
Q-factor; electro-optical modulation; electroabsorption; optical transmitters; optical wavelength conversion; time division multiplexing; wavelength division multiplexing; 20 Gbit/s; 40 Gbit/s; 60 Gbit/s; OTDM; OTDM transmitter; WDM-TDM conversion; WDM-TDM conversion technique; adjacent pulses; coherent crosstalk; conventional optical time division multiplexing technique; crosstalk; electroabsorption wavelength converter; eye opening; high Q-factor performance; high-quality optical signal; highly stable optical signal; optical time division multiplexer; orthogonal polarization states; pulsewidth settings; signal performance; waveform; wavelength division multiplexing-time division multiplexing conversion; wide pulse duration; High speed optical techniques; Optical crosstalk; Optical pulse generation; Optical pulses; Optical transmitters; Optical wavelength conversion; Space vector pulse width modulation; Time division multiplexing; Wavelength conversion; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
