The continued increase in the capabilities and performance in fiber optic networks today require more robust network designs to allow high consumption of information and thus enable users to have greater capacity and data content. That's why we in the task of analyzing and implementing the concept of flexible optical networks to optimize the use of bandwidth at high transmission rates and improved spectral efficiency, which represents the industry an effective economy, and energy.
Space division multiplexing in multicore fibers is one of the most promise technologies in order to
support transmissions of next-generation peta-to-exaflop-scale supercomputers and mega data centers, owing to
advantages in terms of costs and space saving of the new optical fibers with multiple cores. Additionally, multicore
fibers allow photonic signal processing in optical communication systems, taking advantage of the mode coupling
phenomena. In this work, we numerically have simulated an optical MIMO-OFDM (multiple-input multiple-output
orthogonal frequency division multiplexing) by using the coded Alamouti to be transmitted through a twin-core fiber
with low coupling. Furthermore, an optical OFDM is transmitted through a core of a singlemode fiber, using pilot-aided
channel estimation. We compare the transmission performance in the twin-core fiber and in the singlemode fiber taking
into account numerical results of the bit-error rate, considering linear propagation, and Gaussian noise through an optical
fiber link. We carry out an optical fiber transmission of OFDM frames using 8 PSK and 16 QAM, with bit rates values
of 130 Gb/s and 170 Gb/s, respectively. We obtain a penalty around 4 dB for the 8 PSK transmissions, after 100 km of
linear fiber optic propagation for both singlemode and twin core fiber. We obtain a penalty around 6 dB for the 16 QAM
transmissions, with linear propagation after 100 km of optical fiber. The transmission in a two-core fiber by using
Alamouti coded OFDM-MIMO exhibits a better performance, offering a good alternative in the mitigation of fiber
impairments, allowing to expand Alamouti coded in multichannel systems spatially multiplexed in multicore fibers.
The increasing demand of network traffic requires new research centers; improve their communications networks, due to
the excessive use of mobile and portable devices wanting to have greater access to the network by downloading
interactive content quickly and effectively. For our case analyze optical network link through simulation results
assuming a DWDM (Dense wavelength Division Multiplexing) optical link, considering the nonlinearity phenomenon
FWM (Four Mixed Wavelength) in order to compare their performance, assuming transmission bit rates to 2.5 Gbps and
10 Gbps, using three primary wavelengths of 1450 nm, 1550 nm and 1650 nm for the transmission of information,
whose separation is 100 GHz to generate 16 channels or user information. Tests were conducted to analyze optical
amplifiers EDFAs link robustness at a maximum distance of 200 km and identify parameters OSNR, SNR and BER, for
a robust and effective transmission
The increased bandwidth required by applications, tends to raise the amount of optical equipment, for this reason, it is
essential to maintain a balance between the wavelength allocation, available capacity and number of optical devices to
achieve the lowest power consumption. You could say that we propose a model that minimizes energy consumption,
using unicast / multicast traffic grooming in optical networks.
This paper presents a study (simulations) of coupling losses between adjacent waveguides made of tellurite glasses. These waveguides are designed to perform parametric amplifiers (PAs). PAs have some advantageous characteristics over the other optical amplifiers: they have broadband amplification bandwidth (depending on the dispersive characteristics of the waveguide), other all-optical functionalities, and can work at ultra-high bit rates (Pbit/s). PAs are based on the nonlinear phenomena of phase matched four-wave mixing between a strong pump and a weak signal. The parametric gain increases with the waveguide length, the pump power and the nonlinear coefficient of the waveguide. The best alternative to maximize the parametric gain is to reduce the pump power as much as possible, increasing the waveguide length and/or the nonlinear coefficient of the waveguide. The latter parameter can be enhanced by increasing the nonlinear refractive index of the material (n2) or by reducing the waveguide effective area. Here we perform waveguides made of tellurite because these glasses have an n2 that goes up to 30 x 10-19 m2/W. On the other hand, the waveguide length can be increased by using an Archimedean spiral design. This geometry allows obtaining long waveguides (~1 m) within a small area. Using the Finite Element Method we study the separation distance between adjacent waveguides in order to obtain coupling lengths higher than the waveguide length (total losses < 2 dB/m). The waveguide dimensions are optimized to obtain a monomode waveguide with dispersive characteristics to perform PAs (around ~1550 nm spectral region).
KEYWORDS: Optical amplifiers, Raman spectroscopy, Radio optics, Radio over Fiber, Signal to noise ratio, Hybrid fiber radio, Optical fibers, Modulation, Optical simulations, Passive optical networks
This paper we analyzed three alternatives for optical amplification used to extend the reach of optical
fiber link for the transport of RoF (Radio over Fiber) in view of 54 MHz RF signals for wireless
applications.
In this paper we present comparative performance results of optical amplification alternatives, employed to
extend the reach of the optical link for the transport of RoF (Radio over Fiber) signals for wireless applications.
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