This paper dedicated to analysis and review of literature for today’s technology and future aspects of optical networks. This in depth analysis of today’s SONET/SDH Architecture and Reconfigurable structures for SONET rings has been discussed so that one can formulate the next generation SONET/SDH networks. Network layers are analyzed for their design and issues of researches, while dense wavel...

A new intersymbol interference (ISI)-free nonlinearity-tolerant frequency domain root M-shaped pulse (RMP) is derived for dispersion unmanaged coherent optical transmission systems. Beginning with the relationship between pulse shaping and intra-channel nonlinearity effects, we derive closed-form expressions for the proposed pulse. Experimental demonstrations reveal that by employing the propos...

The next major performance plateau for high-speed, long-haul networks is at 10 Gbps. Data visualization, high performance network storage, and Massively Parallel Processing (MPP) demand these (and higher) communication rates. MPP-to-MPP distributed processing applications and MPP-to-Network File Store applications already require single conversation communication rates in the range of 10 to 100...

.................................................................................... x 1 LITERATURE REVIEW......................................................................................... 1 1.1 Background in WDM Communication Networks................................. 1 1.2 Wavelength Demultiplexing In WDM Networks..................................... 1 1.3 Implementation of Wavelength D...

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...

Recent advances in coherent optical receivers is reviewed. Digital-Signal-Processing (DSP) based phase and polarization management techniques make coherent detection robust and feasible. With coherent detection, the complex field of the received optical signal is fully recovered, allowing compensation of linear and nonlinear optical impairments including chromatic dispersion (CD) and polarizati...

Low-loss and low-crosstalk 8 × 8 arrayed waveguide grating (AWG) routers based on silicon nanowire waveguides are reported. A comparative study of the measurement results of the 3.2 nm-channel-spacing AWGs with three different designs is performed to evaluate the effect of each optimal technique, showing that a comprehensive optimization technique is more effective to improve the device perform...

We demonstrate error-free 4×10 Gbit/s 1310 nm DWDM simplified-design transmission over 200 km of standard single mode fibre without any dispersion compensation using SOAs. Introduction Recently, optical communication systems operating at multi-Gbit/s, such as 10 Gigabit Ethernet are becoming increasingly important in local area networks (LANs), metropolitan area networks (MANs) and storage are ...