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International Symposium on Materials and Electrical Engineering (ISMEE) 2017
IOP Publishing
IOP Conf. Series: Materials Science and Engineering
384 (2018) 012051 doi:10.1088/1757-899X/384/1/012051
1.1. Optical Fiber Communication Systems The application of optical fiber communications is in general possible in any area that requires transfer
of information from one place to another. However, fiber-optic communication systems have been
developed mostly for telecommunications applications [4]. Arranged as in figure 1, a basic
communications system consist of a transmitter, a fiber optic as communications channel or
transmission lines and a receiver.
Figure 1. A generic block diagram of an optical communication system [4].
1.2. Fiber to the Home FTTH is an optical signal transmission format from provider center to user area using optical fiber as
channels. The development of this technology is inseparable from the advancement of fiber optic
technology that uses copper wires, as well as services known as Triple Play Service [5]. In an OLT it
consists of several ODNs that work for transport and distribution of data from OLT to ONU [6]. Another
supporting component is Passive Splitter which serves to distribute optical power to all branches. In
figure 2 the use of one optical fiber can move from OLT to a customer of about 32 homes.
Figure 2. The network connecting the Provider uses a passive splitter [7].
1.3. Gigabit Passive Optical Network As said above, G-PON systems are characterized, in general, by an optical line termination (OLT)
system and an optical network unit (ONU) or optical network termination (ONT) with a passive optical
distribution network (ODN) interconnecting them [8]. GPON has a specificity with passive splitter to
divide the light signal, so that from one core can be divided into several cores (2, 4, 16, 32, 64) [9]. The
principle of Passive Optical Network is a point-to-multipoint system. GPON uses TDMA as a multiple
access technique with the nominal bit rate of OLT signals to ONU (downstream) specified in ITU-T
G.984.2 Recommendation is 2488.32 Mbit/s. The nominal bit rate of ONU signal to OLT (upstream) is
1244, 16 Mbit/s.
1.4. Optsystem OptiSystem is a software for simulating fiber optic communications systems and fiber optic sensing
systems that are widely used. There are various types of function. Eg: design, test and optimize [1].
Optisystem software is based on modeling a real optical communication system. Optisystem is equipped
with Graphical User Interface (GUI) which consists of project layout, component list, component model
and graphical display. Library Optisystem consists of active and passive components with wavelength
parameters [10].