Loss of Optical Link

For fiber-based cabling, data transmission is based on the light as the transmission medium. We know that in the transmission process, the loss of light power is inevitable. When connecting components, there will be insertion loss; when optical signals are transmitted over fiber optic cables, there will be attenuation. In addition, the material of optical components and the operation during the cabling have an influence on the amount of loss, which will determine the level of network performance. Therefore, it is necessary to reduce the loss of optical link to a minimum. This article aims to talk about loss of optical link and give some suggestions about loss control.

loss of optical link

Insertion Loss

A complete optical link is finished by the connectivity between different fiber optical components, and no matter what kind of cabling system you are going to deploy, insertion loss is inevitable Take fiber optic connector for example, there is no perfect loss-less connector. It is important to note that even the highest quality connectors will also have insertion loss because of the alignment and the cleanliness. Structured with MT ferrule, MTP connector still has insertion loss which is rated at 0.35 dB maximum. It is impossible to ensure that fiber optic connector does not get dirty. However, dirt and dust can completely obscure the light wavelength and create huge losses.

Attenuation

When light travels through the core of fiber optic cable, the strength of it surely becomes lower. Naturally, the signal strength becomes weaker. This loss of light power is generally called attenuation and it locates on two aspects: internal reasons and external causes, which are also known as intrinsic fiber core attenuation and extrinsic fiber attenuation. Internal reasons of fiber optic loss are caused by the fiber optic cable itself, which is also known as intrinsic attenuation. Basically, there are two main causes of intrinsic attenuation: light absorption and scattering. As for extrinsic fiber attenuation, it is usually caused by improper handling of fiber optic cable. And there are two main types of extrinsic fiber attenuation: bend loss and splicing loss. Besides, fiber optic splicing can also result in extrinsic fiber attenuation.

Loss Control

For the reduction of insertion loss, it is necessary to use fiber optical components of high quality, such as for high-density cabling, MTP fiber connector is preferred.

For the purpose of reducing the intrinsic fiber core attenuation, it is necessary to select the proper fiber optics and suitable optical components for the applications, such as for short distance MTP connectivity, MPO to LC breakout cable utilizes multimode fiber OM3 or OM4; for long distance optical link, single-mode fiber is better than multimode fiber.

For reduction of extrinsic fiber attenuation, it would be better to handle the fiber optic cable properly and splice it with cautious.

Conclusion

Since efficient transmission of light at the operational wavelengths is the primary function of fiber optics needed for a range of applications, the loss of optical link and the potential for its minimization are of great importance in the efficient and economic use of fiber optics. It is essential to take the loss into consideration and reduce the loss to a minimum as much as possible during the cabling process. FS.COM provides high quality fiber optical components with low loss and ensure the high performance of your network, such as MPO fanout cable, MPO patch panel, MTP cassette and so on. If your want to know more details about them, you can visit our site.

Fiber Patch Panel Used in Cabling System

As high-density cabling becomes a trend, it is crucial to realize the simple cable installation and tidy cable organization, which can make the network performance achieve high level. It is not difficult to find that in the fiber-based cabling system, intermediate link connections are usually made at fiber patch panels to accommodate reconfigurations. Using fiber patch panels allows for high-density instant device to device connectivity. This article will introduce some basic knowledge about fiber patch panel.

Overview of Fiber Patch Panel

First of all, let’s have a brief overview of fiber patch panel. Fiber patch panel, also known as the fiber distribution panel, is used to terminate the fiber optic cable while providing access to the cable’s individual fibers for cross connection. A fiber patch panel is usually composed of two parts, the compartment that contains fiber adapters, and the compartment that contains fiber optic splice trays and excess fiber cables.

Advantages of Fiber Patch Panel

Advantage 1. Fiber patch panel is commonly used as a fiber optic cable management unit. The network technicians can use fiber optic patch cable to cross-connect, connect to fiber optic communication equipment or test the individual fibers in the fiber optic cable.

Advantage 2. Fiber patch panel provides a convenient way to operate fiber optic cable connections by plugging in or pulling out the fiber optic patch cable. And selecting signals, arranging or rearranging the circuits can be easily realized without the use of expensive dedicated switching equipment.

Advantage 3. Fiber patch panel can be an opened box which can create a safe environment for the exposed fibers and fiber optic cables. In the meantime, it can leave a space for fusion splicing and connections of fiber optic adapter components.

Advantage 4. Fiber patch panel can help with the installation of fiber optic cables as well as increase the density of installation. Also, it can provide more convenience for organization and management.

Components Used in Fiber Patch Panel

There are three most common components used in fiber patch panel—LC adapter panel, MTP to LC cassette and MTP adapter panel. LC adapter panel is preloaded with LC duplex adapters and it requires trunk cables with LC termination. The LC adapter panel offers the lowest connector loss of any of the patch panel modules. MTP-LC module is also called an MTP to LC cassette and converts MTP trunk cable to LC connections. This module type has LC connectors in front and MTP connectors in back. MTP adapter panel is preloaded with MTP adapters and it supports MTP trunk cable. Each MTP connection supports 8-12 fibers. The MTP adapter panel can easily support 12 MTP connections and 144 fibers or more.

Application of Fiber Patch Panel

In the 1 rack unit (1RU) patch panel drawn in figure below, LC adapter panel, MTP-LC module and MTP adapter panel are supported. These three types of patch panels support trunk cables terminated with MPO or LC connections. The trunk cables plug in the back of the patch panels and LC or MPO patch cords connect to the front of the patch panel. This modular patch panel architecture enables easy installation and scales well. With standard LC interfaces, this modular patch panel architecture supports 36 LC connections in a 1U patch panel. A 42RU rack full of these patch panel modules can support over one thousand fiber optic ports (42X36 = 1,512 LC ports).

Fiber Patch Panels Connections

Conclusion

Fiber patch panels are used in fiber optic management. Installing and managing fiber optic links is a tough thing to do because there are several (hundreds or even thousands) fiber optic cables and cable connections to manage. The fiber patch panels help in eliminating all the wire clutter by offering space and protection for all the fiber cables and cable links that are needed to by the technicians in setting fiber optic links. These panels make cable management, as well as troubleshooting work, a lot easier. And I hope after reading this article, you can have a better understanding of fiber patch panel used in cabling system.