The intensity of the optical signal received by the optical receiving device must be within a certain range, and the optical power should not be too strong or too weak, otherwise the life of the device will be shortened or it will not work properly. The optical fiber attenuator is an optical passive device that can be used to reduce the energy of the optical signal and attenuate the input optical power, so as to avoid distortion of the optical receiver due to the super strong input optical power.

Optical fiber attenuators reduce optical power through absorption, reflection, diffusion, scattering, deflection, diffraction, dispersion, etc. of optical signals. For example, for the absorption of optical signals, set the optical fiber attenuator to a working wavelength range that can absorb light energy. In this range, it does not reflect light and reduce unnecessary echo reflections. In this way, the attenuation effect of optical power is achieved. . Generally, air isolation technology, displacement dislocation technology, attenuating fiber technology, absorption glass method and other technologies are used to make optical attenuators .

The attenuation range of the optical attenuator is 0~65dB. Among them, the attenuation power of fixed optical fiber attenuators currently on the market is between 1 and 30 dB. Fixed fiber attenuator is a type of fiber attenuator, which fixes the attenuation power at an attenuation value. Generally used in telecommunications networks, fiber optic test equipment, local area network (LAN) and cable television (CATV) systems.

There is also a variable optical attenuator, the attenuation level of the variable attenuator can be adjusted, for example, from 0.5 dB to 20 dB, or even 50 dB. Some variable attenuators have very fine resolutions, such as 0.1dB or even 0.01dB. Mainly used in: optical distribution frame, optical fiber network system, high-speed optical fiber transmission system, cable television (CATV) system, long-distance trunk line dense wavelength division multiplexing ( DWDM ) system, optical add-drop multiplexer ( OADM ).

Among them, the fixed optical attenuator has pigtail type, converter type, and converter type, which can be made into FC, SC, ST, LC, MU and other interface types, which are convenient for daily wiring. Usually a single optical attenuator has two interfaces, male and female, which can be male-female or female-female. The male connector interface is generally used to plug into the receiver of the device or the adapter on the adapter panel, and the female connector interface is used to connect the fiber optic jumper. yiyuantong can provide various types of fixed yin-yang optical fiber attenuators with stable performance and reliable quality, which can meet the customized requirements of ST, SC, FC, MU, LC connector interface types and working wavelengths.

Among passive devices, fiber optic attenuators are widely used, second only to connectors and couplers. The performance indicators for measuring optical attenuators mainly include attenuation, insertion loss, attenuation accuracy, and return loss. High-performance optical attenuators have low insertion loss and return loss is usually above 40dB.