Fiber Testing and Fiber Optic Cable Construction and it’s types
The fiber optic communication application may sound elegant in its simplicity, but fiber optic cable testing requires an understanding of some of the basic principles that differentiate fiber testing from its analog wire testing predecessor. An optical fiber consists of a very thin glass rod, which is covered by a plastic protective coating. Light, which is injected into the core of glass fiber, will follow the physical path of that fiber due to the total internal reflection of light between the core and the cladding. The pfg optics used to cover their precision optical components with the optical thin film coating in order to increase the efficiency of their products.
Fiber Testing Methods and Types of Measurement:
There are many important things to assess, verify and measure in an optical fiber-
Fiber Continuity test- When you test a fiber optic cable network, a visible laser source attached to one end of the cable can be used to verify transmission at the opposite end. This type of test is performed on the optic tests to verify the fiber defects such as macro bends. One can also test the continuity of the fiber optic cable to determine whether the right fiber optic cable is properly connected to the right patch panel location or not. A fiber identifier (FI) is a useful handheld fiber testing device that can identify and detect optical signals from outside at any point along with a fiber link. Fiber identifiers are used to check the presence of traffic on the fiber optic and the direction of the transmission. Visible spectrum laser light is used by the visual fault locator to test the continuity of the fiber as well as to detect fault conditions. If there is any break or defective splices in the fiber optic, then the red light will be visible from there. For fiber runs longer than 5 km/3 mi or where access to fiber is limited, an OTDR can be used as a fiber optic cable tester to indicate any continuity issues.
Optical Loss Measurement- As the light travels through the optical fiber, the power level gets decreases. This power level decrease is also known as optical loss. The fiber testers has the most accurate to measure the overall optical loss in a fiber is to inject a known level of light into one end using an OLTS and measure the level of light at the other end.