Bentahar Attaouia* and Kandouci Malika Optimization of Concentration Quenching on Erbium Ytterbium Doped Wave Guide EYDWA Using for Extended Reach up to 160 Km of Hybrid Gigabit Passive Optical Networks and Free Space Optical Technologie “GPON-FSO” https://doi.org/10.1515/joc-2018-0135 Received August 02, 2018; accepted October 07, 2018 Abstract: The purpose of this paper is to demonstrate an implementation of Er 3+ /Yb 3+ codoped glass waveguide amplifiers (EYDWA) as a post-amplifier can provide an extended reach and a high split-ratio for the cost-effective implementation of hybrid fiber-to-the-x (FTTx) and free space optical (FSO) technologies. The performance has been compared on the basis of transmission distance, however the results of simulation show enhancement offered by EYDWA. This amplifier was able to reach transmission distance ratio of 160:5 km for GPON:FSO. Moreover in this paper, was study different characteriza- tions of EYDWA amplifier, which depend essentially on the opt-geometric parameters, such as concentrations of ions erbium, length of the waveguide amplifier and the effect of those parameters to optimize the gain G, quality factor Q, min of BER and eye diagram. Keywords: formatting, waveguide amplifier EYDWA, quenchnig concentration, FSO, GPON 1 Introduction The demand of bringing high-speed broadband to the last mile by Internet users has been rapidly increasing over the past few years. An optical access network technology such as passive optical networks (PON) concept aims at providing an economic implementation of access fiber networks capable of carrying broadband services and offers a different network architecture that enables the essentially unlimited bandwidth of fiber optic to the home (FTTH) to be utilized [1]. While installation of fiber cable might be suitable for some area, there are parts of the city and suburban that requires wireless connectivity due to network mobility need and different geographical area. Transmitting opti- cal signal wirelessly by the atmosphere, or in more famil- iar term, free space optical (FSO) transmission can further reduce substantial amount of fiber installation cost of FTTH [2]. Other, the current standardized GPONs is a maximum of 20 km in length with 64-way splits; this optical link can be extended up to 60 km by the application of optical amplifiers. Several methods have been suggested by using erbium-doped fiber amplifiers (EDFA), erbium- doped waveguide amplifier (EDWA) and erbium ytter- bium doped waveguide amplifier (EYDWA). These later which have received great attention during the last few years in optical telecommunications, present an attrac- tive solution for the compensation of the loss introduced by passive components [3, 4] 2 Optical amplifier Parallel to the development of erbium doped fiber, many studies reported the erbium-doped planar optical wave- guide amplifiers. While an EDFA usually has a length of more than 10 m, an EDWA has a small dimension of around a few centimeters. Due to their small sizes, planar waveguide amplifiers have potential applications in optical telecommunication and signal processing systems as inte- grated devices; these later can be used to compensate the loss induced by other integrated components such as split- ter, fiber etc.; and can also serve as post-or pre-amplifier for active devices such transmitter and receivers. Typically, for planar optical waveguide amplifiers, a high erbium concentration and a high pump power den- sity are needed to obtain sufficient optical amplification gains because the optical interaction path is shorter. At high erbium concentration, however, the erbium lumines- cence will be quenched by energy transfer processes due to ion-ion interactions such as homogenous up-conversion (HUC). These luminescence quenching processes strongly influence the amplifier efficiency of EDWA amplifier [5]. When the concentration levels are such that the separation between two erbium ions is greater than the diameter of *Corresponding author: Bentahar Attaouia, University of mascara, Sidi bel abbes, Algeria, E-mail: bentaha_1011@yahoo.fr Kandouci Malika, Laboratoire d’électronique de photonique et d’optique (LEPO), Sidi bel abbés university, Sidi bel abbés, BP 892 Algeria, E-mail: maikand04@gmail.com J. Opt. Commun. 2018; aop Brought to you by | provisional account Unauthenticated Download Date | 1/6/20 9:05 PM