Classification:
The attenuation power of fixed optical fiber attenuator is fixed (such as 1 dB, 5 dB, 10 dB, etc.), which is generally used in telecommunication network, optical fiber testing equipment, local area network (LAN) and CATV system.
The shape of connector type optical fiber attenuator is similar to that of optical connector. The difference is that the two ends of connector type optical fiber attenuator are connector interface of male connector and connector interface of female connector. This kind of optical fiber attenuator either uses air gap to achieve attenuation, or uses metal ion doped fiber to achieve attenuation. The connector type optical attenuator can be directly connected with connectors of corresponding interfaces (such as FC, St, SC and LC). In addition to the function of attenuating optical signal power, the female female interface type fiber attenuator is like an ordinary adapter, while the male female interface type fiber attenuator is like an optical connector.
The attenuation power of the adjustable optical fiber attenuator changes with the change of the conditions. The variation span of the attenuator is 0.5dB, 20dB, 50dB and so on. Some of them even reach the accuracy of 0.1dB and 0.01dB. The tunable fiber attenuator is generally used in the precise measurement and measurement of optical fiber, and it is also widely used in the erbium-doped fiber amplifier. Its function is to balance the optical signal power in different channels.
characteristic:
In optical fiber system, attenuator is used to reduce the light energy in the core. The most common function of attenuators is to balance the light energy between multi-core systems and reduce the saturation of receivers, because high saturation may reduce system performance. In the absorbance test, the attenuator can absorb excessive signals, because excessive signals may saturate the reference measurement. Plug type attenuator is a male female device for different connector designs. The most common uses are DWDM and EDFA, which are used to reduce the energy of optical signal and can work in the range of 1310mm ~ 1550mm.
On line adjustable optical attenuator: small size, light weight, high attenuation precision, strong stability, wide attenuation range up to 60 dB adjustable range, termination of St, FC, SC, LC, SC / APC, FC / APC, LC / APC connectors, supporting 50 The transmission distance of M can be used in the optical fiber amplification system. Balancing the optical signal power in different channels can be used to adjust the optical signal power of the light source, the optical fiber link where the electric / optical converter is located, and the linear or dynamic range of the optical power meter
Hand held adjustable optical attenuator: small size, light weight, strong stability, high attenuation precision, battery power supply, convenient field operation is an essential tool for the construction and maintenance of optical fiber communication system engineering, applicable to the application of digital system (PDH, SDH) including communication equipment and the system using analog modulation (CATV)
