Gigabit
Passive Optical Networks (GPON) are the backbone of modern high-speed internet.
But are they right for you?In this comprehensive survey of GPON technology, we
explain how GPON works, as well as discuss the advantages and disadvantages of
these optical networks.About
GPON
Gigabit
Passive Optical Networks (GPON) is a communications technology that harnesses
the power of optical fiber to deliver high-speed internet, television and other
services to homes and businesses. The term "passive" highlights its
unique characteristics: it uses passive components such as optical splitters to
deliver data signals without the need for active electronic devices on-site.
How does
GPON work?
GPON is
essentially based on a combination of optical fibers, optical splitters, and
dedicated equipment to transmit data between the central office and the end
user premises. Let's take a closer look at the key components and processes
that make up GPON technology:
Optical Line
Terminal (OLT): The journey starts at the central office where the OLT is
installed. This high-performance device acts as the brain of the GPON network.
It communicates with the Optical Network Unit (ONU) at the customer premises
and manages the data distribution.
Optical
Fiber: The backbone of GPON is optical fiber. Optical fiber is a thin strand of
glass or plastic that can transmit data using light signals. Fiber optic cables
connect the OLT in the exchange with the ONU at the customer premises. It acts
as a data highway on which information is transmitted in the form of light.
Optical
Splitter: To distribute the optical signal efficiently, optical splitters are
used in GPON networks. These passive devices split the incoming optical signal
from the OLT into multiple paths. Each path leads to a single ONU. Typical
splitter ratios are 1:2, 1:4, 1:8, and 1:32, depending on the network design.
Optical
Network Unit (ONU): ONUs are customer-facing equipment in a GPON network. They
are installed at the customer premises and receive the optical signal from the
OLT and convert it into an electrical signal that can be used by the customer's
devices, such as computers, routers, and set-top boxes.
