What is Visual Fault Locators(VFL)?

Visual fault locator is now one of the most commonly used fiber optic testing devices to trace optical fibers, check fiber continuity and find faults such as breaks, bad splices and tight, sharp bends in fiber optic cable.

Visual fault locator is now one of the most commonly used fiber optic testing devices to trace optical fibers, check fiber continuity and find faults such as breaks, bad splices and tight, sharp bends in fiber optic cable.

Visual Fault Locator, it could be regarded to be part of OTDR and the fiber fault locator is cheap. Fiber visual fault locator is a kind of device which is able to locate the breakpoint, bending or cracking of the fiber glass. It can also locate the fault of OTDR dead zone and make fiber identification from one end to the other end. Designed with a FC,SC,ST universal adapter, this fiber testing red light is used without any other type of additional adapters, it can locates fault up to 10km in fiber cable, with compact in size, light in weight, red laser output.

Visual Fiber Optic Fault Locator is used to check, locate and patch faults on singlemode and multimode optical fibers as well as other fiber optic components. The rugged and compact design of the visual fault locator is very suitable for daily use in all fiber optic applications such as in the field, in industrial environment as well as in the laboratory.

Many of the problems encountered in troubleshooting fiber optic networks are related to making proper connections. Since the light used in fiber optic systems is infrared (IR) light, which is beyond the range of the human eye, one cannot see it. In order to solve these problems, you need a visual fault locator. Visual fault locator(VFL) is a kind of device which is able to locate the breakpoint, bending or cracking of the fiber glass. It can also locate the fault of OTDR dead–zone and make fiber identification from one end to the other end.

Importance of Visual Fault Locator

The complex network integrated by optical fiber, connector and jumper makes you difficult to find the fault location. So the visual fault locator is an essential tool that quickly and easily locates problem areas in fiber cables. By pinpointing the exact location of fiber damage, technicians can diagnose, troubleshoot and fix the problem timely and efficiently. The VFL is also used for conducting continuous tests and performing fiber identification. With visual fault locator, you can easily isolate high losses and faults in optical fiber cables.

Working Principle

A powerful visible light from a red diode laser is injected into the fiber, so not only fibers  can be traced, but also high loss points can be made visible. Most applications center on short cables to connect to the fiber optic trunk cables, such as those used in premises cabling or telco central offices. The VFL works best on short cables, up to a few kilometers, thus, it covers the range where optical time-domain reflectometers (OTDRs) are not useful because of the dead zone of the OTDR.

Fiber visual fault locators include the pen type, the handheld type and portable visual fiber fault locator:

Pen type:

Pen Shape Visual Fault Locator

 

Handheld type:

handheld optical Visual Fault

Portable visual fiber fault locator:

Portable Visual Fault Locator

Comment

This basic tool is one that all installers, and maintenance personnel should have in their tool kit.  It is the most economical test tool for quickly verifying continuity, checking the validity of patch cables before or after installation, test and find breaks in LANs, verifying short lengths of installed fiber, or looking for cracked fiber in splice cases, bad connectors, tight crimps in fiber cable, backbone breaks or anywhere light continuity needs checking.

Waterproof Fiber Cables

Waterproof fiber optic patch cables are designed to fit for outdoor connection applications. The strong PU jacket and singlemode APC armored structure of cable provide 1Gigabit data transfer speeds in high bandwidth application.

With the development of modern communication industry, optical fiber has become an increasingly important communication line medium because of its advantages such as wide frequency band, low loss, long transmission distance and anti-electromagnetic interference. In metropolitan area networks and campus networks, the application of outdoor optical cables is becoming more and more common. For outdoor optical cables, in addition to bandwidth, loss, and other transmission performance, another very important technical indicator is the optical cable’s water blocking performance.

Waterproof fiber optic patch cables are designed to fit for outdoor connection applications. The strong PU jacket and singlemode APC armored structure of cable provide 1Gigabit data transfer speeds in high bandwidth application, up to 5 times faster than standard 9/125um fiber patch cable. What’s more, it’s IP67MPO cable connectors have an extremely rugged, protective rubber coating with integral anti-kink strain-relief boot and a rubber-coated, metal, latching cap, attached by a steel lanyard. When mated or capped, the connection is environmentally sealed up to IP65. They can resist high temperature and suit to use in harsh environment, and ideal for use in a variety of applications, including Fiber to the Antenna (FTTA) and Fiber to the Home(FTTH).

9d5ff7d9ed32bdb96ed28259c27efe6c.image.500x500

Like choosing any other fiber optic patch cables, the connector type, fiber count, fiber type (single-mode or multimode), polish type, cable length and cable jacket are factors that should be considered as well. When buying waterproof fiber optic patch cords, the IP (International Protection or Ingress Protection) rating is an important parameter. Knowing the IP code can help you find your wanted waterproof cable.

 

IP rating system is a classification showing the degrees of protection from solid objects and liquids. IP rating codes do not include hyphens or spaces, and consist of the letters IP followed by one or two figures. The first number refers to the degree of protection against the entry of foreign solid objects, such as dust. These protection levels range from 0 to 6. The second number of the IP code refers to the degrees of protection against moisture/liquids, which are raging from 0 to 8. The first and second number of the IP code can be replaced by the letter “6″or7”.Norally called IP67.

There are two types of IP67MPO weatherproof connector: IP67MPO plug (with locating pins) and IP67MPO Socket (without locating pins), the plug of one cable and the socket of the other cable can be connected to extend the cable length. See blow:

MPO Component Details

Features& Application

features & Application

Specification:

specification

Conclusion

When you used Waterproof fiber optic patch cables,you can use it as a reference in choosing a waterproof cable, but you should also consider other factors according to your specific applications. Fiber-mart have kinds of fiber optic patch cables for you choose. Continue reading “Waterproof Fiber Cables”