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What Do You Know About Optical Fiber Test Instruments?

Views: 368     Author: Site Editor     Publish Time: 2020-11-03      Origin: Site

With the rapid development of the Internet of Things and 5G technology, the construction and maintenance of optical fibers in the intelligent industry has gradually increased, which has promoted an increase in the demand for various optical fiber tools, such as fiber adapters, optical attenuator, fiber termination boxes, distribution boxes, etc. They have different types and uses. Today we will mainly introduce several commonly used optical fiber test instruments.


Commonly used optical fiber test instruments are: optical power meter, stable light source, optical multimeter, optical time domain reflectometer (OTDR) and optical fault locator.


10-3-fiber termination boxes


1. Optical Power Meter


It is used to measure the absolute optical power or the relative loss of optical power passing through a section of lc st fiber patch cables. In optical fiber systems, measuring optical power is the most basic. It is much like a multimeter in electronics, in optical fiber measurement, the optical power meter is a heavy-duty meter, and every optical fiber technician should have one. By measuring the absolute power of the transmitter or optical network, an optical power meter can evaluate the performance of the corning fiber patch cables. Using an optical power meter in combination with a stable light source can measure connection loss, check continuity, and help evaluate the transmission quality of fiber cables.



2. Stable Light Source


Combining the stable light source with the optical power meter can measure the optical loss of sc multimode fiber cables. For ready-made fiber optic systems, the system's transmitter can be used as a stable light source. If the optical termination box cannot work or there is no optical termination box, a separate stable light source is required. The wavelength of the stable light source should be as consistent as possible with the wavelength of the system terminal box. After the system is installed, it is often necessary to measure the end-to-end loss to determine whether the connection loss meets the design requirements.



3. Light Multimeter


It is used to measure the optical power loss of the custom fiber patch cables. There are two types of optical multimeters.

1) It consists of an independent optical power meter and a stable light source.

2) It is an integrated test system that combines an optical power meter and a stable light source.


When it is in a short-distance local area network (LAN), technicians can use an economical optical multimeter at either end, a stable light source at one end and an optical power meter at the other end. For long-distance network systems, technicians should equip an integrated optical multimeter at each end.


When choosing meters, temperature is the most stringent criterion. On-site portable equipment should be controlled at -18°C (no humidity control) to 50°C (95% humidity control)



4. Optical Time Domain Reflectometer (OTDR) and Fault Locator


It is expressed as a function of fiber loss and distance. With the help of OTDR, technicians can see the outline of the entire system, identify and measure the span, splice point and connector of the outdoor fiber patch cable. Among the optical fiber faults test instruments, OTDR is the most classic and expensive instrument. Different from the two-end test of optical power meters and optical multimeters, OTDR can measure fiber loss through one end of the fiber. The OTDR trace line gives the position and size of the system attenuation value.

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