Optical fiber test charts include: optical power meters, stable light sources, optical multimeters, optical time domain reflectometers (OTDRs), and optical fault locators. Optical power meter: Used to measure absolute optical power or relative loss of optical power through a length of fiber. In fiber optic systems, measuring optical power is essential. Much like the multimeter in electronics, in optical fiber measurement, the optical power meter is a heavy-duty common watch, and the fiber technician should be one. By measuring the absolute power of the transmitter or optical network, an optical power meter can evaluate the performance of the optical equipment. Using an optical power meter in combination with a stable source, it is possible to measure connection loss, verify continuity, and help evaluate fiber link transmission quality. Stable light source: Light that emits a known power and wavelength to the light system. The stable light source is combined with an optical power meter to measure the optical loss of the fiber system. For off-the-shelf fiber optic systems, the system‘s transmitter can often be used as a stable source. If the terminal is not working or there is no terminal, a separate stable light source is required. The wavelength of the stabilized source should be as consistent as possible with the wavelength of the system end. 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, such as measuring the loss of the connector, the connection point, and the loss of the fiber body. Optical Multimeter: Used to measure the optical power loss of a fiber link.
There are two types of optical multimeters: 1. It consists of an independent optical power meter and a stable light source. 2. Integrated test system combining optical power meter and stable light source.
In short-range local area networks (LANs) where the endpoint distance is within walking or talking, the technician can successfully use the econom.