1.Fiber optic identifier
It is a very sensitive photodetector. When a fiber is bent, some light will be radiated from the core. These light will be detected by the fiber optic identifier, the technician according to these light can be multi-core fiber optic cable or splice board in a single fiber from the other fiber identification.
The fiber identifier can detect the state and direction of the light without affecting transmission. To make this task easier, the test signal is usually modulated to 270Hz, 1000Hz or 2000Hz at the transmitter and injected into a specific fiber.
Most of the fiber optic identifier for the working wavelength of 1310nm or 1550nm single-mode fiber optic cable, the best fiber optic identifier is available online using macro-bending technology to identify the fiber optic cable and test the transmission direction and power in the fiber optic cable.
2.fault locator
Fault locator (also known as fault tracker), is based on laser diode visible light (red light) source, when the light is injected into the fiber, if there is a fiber break, connector failure, excessive bending, poor fusion quality and other similar faults, through the light emitted to the fiber can be visually located on the fiber fault.
The visual fault locator emits in continuous wave (CW) or pulse mode. Typical frequencies are 1Hz or 2Hz, but can also operate in the kHz range. Typical output power of 0dBm (1Mw) or less, working distance of 2 to 5km, and support all common connectors.
3.Optical loss test equipment
Optical loss test equipment (also known as optical multimeter or optical power meter) in order to measure the loss of a fiber optic cable link, you need to transmit a calibrated and stable light at one end, and read the output power at the receiving end. These two devices make up the optical loss tester. When the light source and the power meter are combined into one set of instruments, they are often called optical loss testers (also known as optical multimeters). When we measure the loss of a link, we need one person to operate the test light source at the transmitter side and another person to measure it with an optical power meter at the receiver side, so that we can only get the loss value in one direction.
Usually, we need to measure the loss in both directions (because of the presence of directional connection loss or due to the asymmetry of the transmission loss of the fiber optic cable). At this point, the technicians have to exchange equipment with each other and make measurements in the other direction.
But what to do when they are more than ten floors or tens of kilometers apart? Obviously, if these two people each have a light source and an optical power meter, then they can be measured on both sides at the same time, and now the advanced fiber optic cable test sets for certification testing is possible to achieve two-way dual wavelength testing.
In short, to complete an optical loss measurement, a calibrated light source and a standard optical power meter is indispensable.
