The 1550nm Erbium-doped fiber amplifier uses Erbium-doped fiber as the active medium. When the pump light is input to the EDFA, most of the Er3+ in the ground state can be pumped to the excited state, and the Er3+ in the excited state can be quickly transferred to the metastable state without radiation. The average residence time of Er3+ in the metastable state is 10ms. Therefore, it is easy to form a particle population reversal between the metastable state and the ground state. At this time, the signal photons pass through the erbium-doped fiber and generate a large number of photons exactly the same as themselves under the stimulated radiation effect, so that the signal photons increase rapidly, so that the optical signal can be continuously amplified at the output end.

YGF1501 ~ 21D C-band DWDM Erbium-doped fiber amplifier is a representative of optical amplifiers. Because the wavelength of EDFA is 1550nm, which conforms to the low-loss frequency band of optical fiber, its technology is relatively mature and has such a wide range of applications. The machine adopts mature 1550nm modular technology, the core components are JDSU, BOOKHAM, FITEL and other high linear, low noise distributed feedback pumped laser, new optical passive device, combined with MCU microprocessor technology and ATC, APC automatic control technology, all the working state parameters are directly displayed on the LCD panel. Once the working parameters of the laser deviate from the allowable range of the set value, the micro-processing will automatically turn off the laser power supply, and the red light flashes to warn the alarm, and the panel display displays the fault cause, so as to ensure the excellent performance of the technical indicators. The machine also has the characteristics of low noise factor, high isolation of input and output, and low nonlinear distortion. Its built-in network management transponder supports WEB and SNMP, which can realize the network management and remote monitoring of the equipment.