Performance Improvement ...(IJIEEB-V8-N4-4)

Performance Improvement by Pre-Amplifying with Erbium, Ytterbium Doped Devices Link Extenders of Fiber to the Home

I.J. Information Engineering and Electronic Business, 2016, 4, 26-34

Published Online July 2016 in MECS (http://www.77cn.com.cn/) DOI: 10.5815/ijieeb.2016.04.04

Performance Improvement by Pre-Amplifying with Erbium, Ytterbium Doped Devices Link

Extenders of Fiber to the Home

Bentahar Attaouia

University of Djilali Liabes, Department of electronic, Sidi Bel Abbes, 22000, Algeria

E-mail: bentaha_1011@yahoo.fr

Kandouci Malika

University of Djilali Liabes, Department of electronic, Sidi Bel Abbes, 22000, Algeria

E-mail: maikand04@gmail.fr

Abstract—This paper analyzes the performance of hybrid will provide in-depth knowledge of the principles and gigabit passive optical network (GPON) and wireless applications of gigabit passive optical networking as well communication (FSO) system using EDFA and EYDWA as fiber to the home application. The principal of GPON as pre-amplification configuration to compensate the is to connect a single optical fiber from an optical line losses due to the fiber cable and the free space channel terminal (OLT) to multiple optical network units (ONUs) for 2.5 Gb/s of data. The performance for both amplifiers using time division multiple access (TDMA), this later has been compared on the basis of distance, FSO range allows users to share bandwidth according to the time and number of users, however the results of simulation slots allotted to them [3]. show enhancement offered by EYDWA as compared as While installation of fiber optic cable might be suitable EDFA amplifier. This amplifier was able to reach for some area, there are parts of the city and suburban transmission distance over 245 Km optical fiber and 1Km that requires wireless connectivity due to network range FSO with best BER value around 10-9 and good eye mobility need and different geographical area. diagram. Whereas, the fiber distance has been limited to Transmitting optical signal wirelessly, can further reduce 64 Km by using EDFA amplifier. substantial amount of fiber installation cost has been accomplished through the transmission of information Index Terms—EDFA amplifier, EYDWA pre-amplifier, which is loaded with optical radiation from a transmitter GPON, wireless communication, gain, noise figure, to a receiver, separated by the atmosphere [4]. quality factor. Advances in fiber optic and free space links have shown promise for optical links to provide data rates in

excess of a gigabit per second [5], however free Space

I. INTRODUCTION Optical communication has the potential to provide high

rate and has been successfully applied for short-distance

Fiber-to-the-Home “FTTH” is defined as a

links in difficult locations. The basic architecture of FSO

communications architecture in which the final

consists of two transceivers and a transmission medium,

connection to the subscriber’s premises is optical fiber.

which is air itself. Lasers and photo detectors are used as

FTTH deploiements are mostly based on Passive Optical

the transmitter and receiver, respectively.

Network (PON) technology. This architecture for FTTH

The splitting ratio of GPON has been recently

deployments are characterized by passive optical splitters

intensified beyond 128 and the physical reach has been

to distribute the fiber to each customer using splitting

increased significantly to longer than 60 km [6]. The

ratios ranging up to 1:64 or even 1:128 .

requirement needs large link power budget and gives rise

Recently standardization bodies (IEEE, FSAN) have

to the use of optical line amplifiers in conventional PON

specified normalization for PONs for FTTH that permits

systems. Several methods that use optical amplifiers in

a splitting ratio up to 32 in the case of EPON and up to 64

these PON systems have been suggested by using

users for Gigabit Passive Optical Network (GPON). This

erbium-doped fiber amplifiers (EDFA), erbium doped

is mainly limited: on the one hand, by the bandwidth

waveguide amplifier (EDWA) and erbium ytterbium

sharing level, on the other hand, by the splitter loss [1].

doped waveguide amplifier (EYDWA) [7]. These later

A gigabit optical network (GPON) is a promising

which have received great attention during the last few

solution to the increasing needs of higher bandwidth

years in optical telecommunications, present an attractive

requirement for FTTH technology deployment in various

solution for the compensation of the loss introduced by

parts of the world [2]. Furthermore, GPON/FTTH course

passive components. [8, 9]

Performance Improvement by Pre-Amplifying with Erbium, Ytterbium Doped Devices Link Extenders of Fiber to the Home

III. SIMULATION SETUP

II. OPTICAL AMPLIFIER

The principle objective of this paper is to designs a wireless hybrid GPON system based on pre-amplification which can be implemented with a splitting ratio of 64 and 20 dB of loss at a signal input of 10 dBm. Figure 3 depicts the configuration of the downstream system performance, the optical line terminal (OLT) consists of DFB laser which transmits 2.5 Gb/s of bit rates at 1550 nm wavelength and over 250 Km fiber length. Then the signal was split before transmitted through 1 Km FSO range receiver which was individually equipped with an optical network unit (ONU). On the receivers side, the avalanche photodiode (APD) is used followed by a low pass filter and a 3R regenerator, a quality factor and eye patterns are used as evaluation criteria.

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