The year 2002 has brought a turn around in the optical networking. Several technologies that were hot until last year are no longer so. Beginning with networking trends and recent DWDM records, a sample of recent optical networking products and applications will be presented. Key technological developments that made optical networking a hot topic will be explained. Upcoming optical technologies...

polarization diversity AOTF in the passive, or bar, state, and (d) in the active, or cross, state. Abstract: An acousto-optic tunable switch (AOTS) can provide highly selective wavelength switching and wavelength routing in optical DWDM systems. This paper presents the basic concept of AOTS and a simple analysis of the phase mismatch and wavelength deviation in WDM systems using acousto-optic t...

We have previously reported on the hypersensitivity to layer thickness errors of DWDM and similar narrow band filter coatings. We further simulated how well certain natural error compensation effects work to mitigate the effects of these errors. We here refine the model to even better simulate what is likely to occur in actual practice. We show examples of the effects of various types and level...

In this paper, we investigated the 96 × 10 Gbps DWDM system with the interval of 100 GHz for different modulation and further compare the performances of these formats in the term of Quality factor and eye closure. It is observed that non-return to zero provide better results amogst other. Further, we covered 190 Km of single span distance using this system with NRZ modulation format.

We propose occupying the guard bands in closely spaced WDM systems with redundant signal spectral components to increase tolerance to frequency misalignment and channel shaping from multiplexing elements. By cyclically repeating the spectrum of a modulated signal, we show improved tolerance to impairments due to add/drop multiplexing with a commercial wavelength selective switch in systems usin...

In this paper we discuss the application of a metaheuristic approach based on the Scatter Search to deal with robust optimization of the planning problem in the deploying of the Dense Wavelength Division Multiplexing (DWDM) technology on an existing optical fiber network taking into account, in addition to the forecasted demands, the uncertainty in the survivability requirements. Keyword: Netwo...