It is a very sensitive photodetectors. When you will be a fiber bending, some light radiation from the fiber core. The light will be detected by the fiber identification, technical staff according to these light can be a single fiber in the multi-core optical fiber or patch panel identified from the other fiber out. Optical Fiber Identifier can detect the status and direction of the light does not affect the transmission. In order to make this work easier, usually at the sending end to the test signal modulated into 270Hz, 1000Hz or 2000Hz and injected into a specific fiber. Most of the optical fiber identifier for the operating wavelength of 1310nm or 1550nm single-mode fiber optical fiber, optical fiber identifier can use the macro bending technology to identify the direction and power of the transmission fiber and the fiber under test online.
2, the fault locator (fault tracking)
This device is based on laser diode visible light (red light) source, when the light injected into the fiber, if fiber fracture, connector failure, bending over, poor weld quality failure by launching the light of the fiber to fiber fault visualization positioning. Visual Fault Locator launched a continuous wave (CW) or pulsed mode. The typical frequency of 1Hz or 2Hz, but can also work in the kHz range. Usually the output power of 0dBm (1mW) or less, the working distance of 2 to 5km, and to support all the common connector.
3, optical loss test equipment (also known as optical multimeter or power meter)
To measure the loss of a fiber link, you need to launch the calibration stability of light at one end, and read out the output power at the receiving end. Both devices constitute the optical loss tester. The light source and power meter synthetic set of instruments, often referred to as the optical loss tester (also known as optical multimeter). When we measure the loss of a link, you need a test light source at the sending end operations while another person to use optical power meter to measure at the receiving end, this can only be drawn in one direction on the loss.
Typically, we need to measure the losses on both directions (because of the existence of the connection loss or that is due to the asymmetry of the transmission loss). At this time, the technical staff must be mutual exchange of equipment and then the other direction of measurement. However, when they separated by more than 10 floors, or dozens of kilometers, how to do it? Obviously, if two individuals each have a light source and an optical power meter, then they can be on both sides simultaneously measure now used for certification testing of advanced fiber-optic test kit can be bi-directional dual wavelength testing such as: the CertiFiber in Fluke 'and the DSP cable test series FTA fiber test package.
In short, to complete an optical loss measurement, a calibration light source and a standard optical power meter is indispensable. Reproduce from http://www.fiber-optical-networking-products.com/
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