Why it is called passive optical network?

Definition. Passive Optical Network (PON) is a FTTH (Fiber to the Home) technology deployed in both domestic and commercial consumers. It is called a passive network since it does not require a power equipment to amplify or process signals.

What is a passive optical local area network?

Passive Optical LAN (POL) is a new way to structure a telecommunications network, replacing traditional structured cabling, which consisted of multiple levels of switch and router aggregation. A POL consists of an optical line terminal (OLT), an optical splitter, and optical network terminals (ONTs) to transmit voice.

What are the advantages of passive optical networks?

Cost Effective: A PON can split a single optical fibre to connect multiple customers, a move which translates into cost savings. As the PON design avoids the costs of exclusive fibre to ISP connections, fewer materials and maintenance costs are in place.

What is a passive optical component?

Passive optical components are data format transparent, combining and dividing optical power in some predetermined ratio (coupling ratio) regardless of the information content of the signals. WDMs can be thought of as wavelength splitters and combiners.

What is the difference between passive and active optical networks?

Active Optical Network is used for large distance areas up to 90 Km whereas Passive Optical Network is used in small distance areas upto 20 Km. Where Passive Optical Network works on shared fiber system while Active Optical Network works for dedicated fiber system.

What is ONU device?

ONT (Optical Network Termination), also called ONU (Optical Network Unit), refer to the consumer end equipment in an optical Fiber to the Home (FTTH) link.

What is GPON and how it works?

GPON uses Asynchronous Transfer Mode (ATM) for voice, Ethernet for data, and proprietary encapsulation for voice. This means that it uses fixed-sized cells instead of variably sized packets of data. It offers faster Gbps than EPON (Ethernet passive optical network) on downstream and upstream bandwidths.

Is GPON shared?

The basis of GPON is that a single fibre connection to the local exchange can be “split” and shared between multiple end customers. It achieves this with a passive (not electrically powered) optical splitter in a junction box, usually in the pavement/road manhole around a cluster of potential end customers.

How do optical amplifiers work?

An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. In doped fiber amplifiers and bulk lasers, stimulated emission in the amplifier’s gain medium causes amplification of incoming light.

What is Aon and GPON?

In an AON system, the subscribers have a dedicated fiber-optic strand, which allows them to get the same bandwidth that isn’t shared. While in a PON network, users share the fiber optic strands for a portion of the network in PON.

What is passive fiber?

Passive fibers are optical fibers without laser-active dopants in the fiber core. That usually implies that they can only passively transmit light, with some propagation losses are without amplification of the optical power.