Abstract-An automated system for electronic noise measurements on metal films is presented. This new system, controlled by a personal computer which utilizes National Instruments' LabVIEW software, is designed to measure low frequency noise as a function of an externally imposed magnetic field and as a function of a dc bias current in low-ohmic samples and magnetic sensors. With this system we are able to measure continuously for several days, during which the measured spectra are collected, processed and stored for further analysis.

A theoretical analysis of the thickness dependence of the localization effect on the normalstate resistivities in highT c Y1Ba2Cu3O7−δ thin films

Cost-effective up to 40 Gbit/s transmission performance of 1310 nm directly modulated lasers for short to medium range distances.

Abstract-Interferometric crosstalk, arising from the detection of undesired signals at the same nominal wavelength, may introduce large power penalties and bit-error rate (BER) floor significantly restricting the scalability of optical networks. In this paper, interferometric crosstalk reduction in optical wavelength-division-multiplexing (WDM) networks by phase scrambling is theoretically and experimentally investigated. Enhancement of 7-and 5-dB tolerance toward crosstalk is measured in a 2.5-Gb/s transmission link of 100 km and 200 km of SSMF, respectively. This result proves the feasibility of optical networking in the local area network/metropolitan area network (LAN/MAN) domain while tolerating the relatively high crosstalk levels of present integrated optical switching and cross-connect technology. Experiment is in good agreement with theory. Recommendations on the use of phase scrambling to reduce crosstalk in WDM systems are given.Index Terms-Error analysis, interferometric noise, optical communication, optical crosstalk, phase scrambling, wavelength-division multiplexing (WDM) networks.

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