Photonik II - optische Kommunikationssysteme (Hochbitratenuebertragung). Teilvorhaben: GaAs-OEICs fuer ein 40 Gbit/s Uebertragungssystem Abschlussbericht

Within the scope of the project a complete chip set [1] for optoelectronic 40 Gbit/s ETDM data transmission systems has been designed, realised by the use of the IAF GaAs E/D-HEMT technology [2], and successfully utilised in system demonstrators by the project partner Lucent Technologies. The chip set comprises 2:1 and 4:1 multiplexers, a modulator driver, an optical receiver for 1.3 #mu#m up to 1.55 #mu#m wavelength, a limiting amplifier, a data decision circuit, a clock recovery circuit and 1:2 as well as 1:4 demultiplexers. Additionally a data decorrelator has been developed and realised for the project partner Lucent Technologies, to make four synchronous 10 Gbit/signals available for transmission experiments. Within the project the data rate could be enhanced from 10 Gbit/s via an intermediate stage at 20 Gbit/s to 40 Gbit/s and for some components considerably above. This improvement is mainly based on a considerable gain of knowledge in the fields of circuit techniques and design methodology [3]. In a smaller scale, also the transit frequencies and thus the speed performance of the circuits could be increased by the use of pseudomorphic InGaAs channels. From the technology point of view, however, the stabilisation of the yield for integrated circuits with up to 1000 FETs and a characteristical gatelength of only 0.2 #mu#m on 3 inch wafers has to be pointed out. (orig.)Available from TIB Hannover: DtF QN1(68,57) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman