نتایج جستجو برای: wavelength division multiplexing

تعداد نتایج: 163890  

Journal: :CoRR 2009
Abd El Naser A. Mohammed Mohamed M. E. El-Halawany Ahmed Nabih Zaki Rashed Mahmoud M. A. Eid

In the present paper, the recent applications of optical parametric amplifiers (OPAs) in hybrid wavelength division multiplexing (WDM)/time division multiplexing (TDM) local area passive optical networks have been modeled and parametrically investigated over wide range of the affecting parameters. Moreover, we have analyzed the ability of the hybrid WDM/TDM Passive optical networks to handle a ...

2000
F. GONZÁLEZ

In this paper, we consider the Routing and Wavelength Assignment (RWA) problem in Wavelength Division Multiplexing (WDM) networks. Firstly, we propose separate linear programming (LP) formulations for the lightpath routing and the wavelength assignment subproblems. Then, an iterative algorithm that integrates both formulations is also proposed for solving the complete RWA problem. The objective...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز 1387

روش انتشار نور (bpm) متداول بطور وسیعی در محاسبه انتشار میدان های نوری جلو رونده بکار برده شده است. هرچند این روش هنگامی که ضریب شکست بطور مناسبی به آهستگی در راستای انتشار تغییر کند آنچنانکه انعکاسات ایجاد شده قابل صرفنظر کردن باشند، قابل استفاده می باشد. اما بسیاری از ادوات نوری شامل ناپیوستگی هایی از موجبرهای مختلف و ساختارهای grating در راستای انتشار میدان نوری خود می باشند. بنابراین یک روش...

Journal: :IEEE Trans. Computers 1997
Xin Yuan Rami G. Melhem Rajiv Gupta

ÐIn this paper, we study distributed path reservation protocols for multiplexed all-optical interconnection networks. The path reservation protocols negotiate the reservation and establishment of connections that arrive dynamically to the network. These protocols can be applied to both wavelength division multiplexing (WDM) and time division multiplexing (TDM) networks. Two classes of protocols...

2014
Parul

As speed & bandwidth has always been a cause of concern in communication network, WDM emerges as a vital solution to these problems. The problem arises when the demand for bandwidth in a fiber optic network exceeds the current capacity, WDM helps in expanding the capacity of a fiber optic network without requiring additional fiber. The decision problem is to find the most cost-effective combina...

Journal: :Optics letters 1995
E A De Souza M C Nuss W H Knox D A Miller

We demonstrate wavelength-division multiplexing with a single broadband femtosecond source by slicing the 3.7-THz spectral bandwidth of 85-fs laser pulses into 16 channels that are modulated individually.

2009
J. Larry Spencer

Optical wavelength division multiplexing (WDM) systems, with signals transmitted on different wavelengths through a single optical fiber, can have increased bandwidth and fault isolation properties over single wavelength optical systems. This paper considers two WDMsystem designs that might be used with multimode fibers and gives a general descripton of the components which could be used to imp...

2007
Christina Lim Masuduzzaman Bakaul Ampalavanapillai Nirmalathas Dalma Novak Rod Waterhouse

Broadband wireless access operating in the microwave and millimeter-wave frequency windows has been actively investigated for future ultra broadband communications. The drastic increase in the throughout of each base station in these systems necessitates the use of an optical fiber backbone to provide broadband interconnections between the central office and all the antenna base stations. With ...

2001
Ton Koonen Huug de Waardt Jack Verhoosel

A combination of flexible optical time division multiplexing and dense wavelength division multiplexing techniques is deployed for realising a reconfigurable multi-Tbit/s data transport network connecting over 13000 telescope antennas. Both short-range and long-range transport in the 1.3 μm and in the 1.5 μm wavelength range, respectively, are explored. Introduction Very high capacity optical d...

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