With wavelength division multiplexing (WDM) several optical signals can be transferred in a single optical fiber [6][7]. This technology allows more efficient use of the huge capacity of an optical fiber but also poses new network design and management problems, especially when wavelength conversion is not possible in the nodes. In this paper we consider the routing and wavelength assignment pr...

Optical networks evolve fast. Nowadays many technologies of optical networks are using. But there are some restrictions which make limited of the possibilities of the optical networks. Contention Resolution is one of them. There are several technologies of reducing of Contention Resolution. They will be analyzed in this paper. The advantages and disadvantages of these technologies will be descr...

We introduce and describe the problems and challenges for the SOH (synchronous optical hierarchy), which is a form of WRON (wavelength routed optical network) where the signals occupy fractions of a wavelength through the use of timeslots in frames. Using timeslots for transparent optical networks will solve the capacity granularity problem which is present in the WRON. We define the problem of...

Semiconductor optical amplifiers are used for efficient wavelength conversion up to 4 Gb / s. The rise and fall time as well as extinction ratio are experimentally analyzed. System performance at 4 Gb / s is evaluated showing a penalty of only 1.5 dB for the converted signal for conversion over 17 nm.

in this article, the effect of cells' radius on the behavior of wavelength switching optical filter andthe effect of the radius of the optical filters' key characteristics such as wavelength resonance onan optical filter based on photonic crystals, have been investigated. currently, the most commonapplied mechanism for designing optical filter based on photonic crystals is using twomechanisms s...