Optical fiber attenuator is used to reduce the power of optical signals to a certain degree of equipment. Most people may think that the greater the power of the optical signal, and we often use the optical amplifier to increase the power of the optical signal, then why use fiber attenuator to reduce the power of the optical signal? This is because the power of optical signals over the assembly causes the optical receiver to load too heavily, Fiber Optic Attenuator resulting in distorted signals, so the use of fiber attenuator is required to reduce power. Another case is that the optical signal power of each channel needs to be roughly the same in a multi wavelength fibre optic system, so the fiber attenuator is used to equalize the power of each channel.
Fiber attenuator is generally used in two situations: one is permanently installed in the optical fiber link, used to equalize the power of the optical signal between the optical transmitter and the optical receiver; the other is to test the power of the optical signal, which means that the power of the optical signal is reduced by the light attenuator, and then the power allowance in the optical fiber link is tested.
Optical attenuator is a kind of very important fiber optics passive device which appears with the development of optical communication industry, and fiber attenuator is a kind of optical device which can reduce the energy of optical signal. Fiber Optic Attenuator For the attenuation of input optical power, the distortion caused by optical receiver is avoided because of the strong input power.
Optical fiber attenuator is mainly used in: optical fiber network, optical data network, fiber CATV network.
Optical fiber Attenuator test system features: High attenuation precision, low additional loss, good stability.
The work principle of optical fiber Attenuator: (1) Air isolation technology: the optical transmission in optical fiber is constrained by the Pating, which can not be scattered, and maintain the relative stability of strength. And once it is detached from the fiber, Fiber Optic Attenuator the air is spaced between the fiber and the fiber, and the light scatters out, causing the light to decay. (2) Displacement dislocation technology: This method is the fiber core of 2 fibers of micro-translation dislocation, so as to achieve the effect of power loss. (3) Attenuation of optical fiber technology: According to the absorption of metal ions in light, the development of a mixed metal ions attenuation fiber optical fiber into the ceramic core, after special process treatment, Fiber Optic Attenuator can be made of yin-yang fixed attenuator. (4) Absorption glass method: The optical polishing of the neutral absorption glass can also be used in the production of Light attenuator.
Classification of optical Fiber Attenuator: (1) tunable optical attenuator: tunable optical attenuator (VOA) is widely used in optical communication, its main function is to reduce or control the optical signal. We have introduced a new type of laser energy attenuator with continuous adjustable and large attenuation coefficients. The device is simple in structure, less in components, small in size, convenient in production, low in cost, Fiber Optic Attenuator and easy to integrate with other devices. (2) Fixed optical attenuator: fixed optical attenuator for optical fiber systems may use a variety of functions principle. (3) Yin-yang Optical fiber attenuator: This is a male-female device for different connector design (LC/SC/FC/ST/MU), PC, UPC or APC grinding (APC optional cone or step-shaped core), attenuation value: 1~30db, Wavelength: Single mode 1310um, 1550um or double wavelength, multimode 850um or dual wavelength, with dust cap, yin-yang type fiber attenuator features: Metal ions attenuation fiber to achieve attenuation, high power, light weight, small size, high precision, good stability, a variety of forms, easy to use; the last point is the application range of optical fiber Attenuator: optical wiring frame, Optical fiber network system, high-speed optical fiber transmission system, cable TV (CATV) system, Fiber Optic Attenuator long-distance trunk dense wavelength division multiplexing (DWDM) system, Optical Division Multiplexer (OADM).