Optical materials

LC Fiber Optic Attenuators from Huihong Fiber, Inc

October 1, 2019

LC attenuator is a light passive device, mainly used in optical fiber debugging optical power performance, optical instrument calibration correction and fiber optic signal attenuation to ensure that optical power in the link stable, ideal level, without changing its original transmission wave.

This fiber is the most widely used fiber, most of the fiber has been laid, fiber optic cable is most of this kind of fiber. In the late 1970s, attempts were made to replace light-emitting diode light sources with developed long-life semiconductor lasers to obtain longer communication distances and greater communication capacity, but pattern noise occurs when lasers are transmitted in multimode optical fibers. In order to overcome the mode noise, in 1980 successfully developed a single-mode fiber (non-dispersive displacement single-mode fiber), referred to as standard single-mode fiber, which ITU-T recommends as G.652 fiber. Because the design idea of single-mode fiber is to transmit only one mode, there is no mode noise that occurs when transmission occurs in multimode fiber. Therefore, in the mid-1980s, 140Mbit/s optical fiber communication system consisting of laser light source and standard single-mode fiber, in which the relay distance and transmission capacity far exceeded the transmission system of coaxial cable, so that the optical fiber communication system gradually replaced the copper cable communication, becoming the main communication mode adopted in the telecommunications industry.

fiber attenuator is an optical device that reduces the energy of a light signal. Used for the attenuation of input optical power, avoiding distortion caused by the input optical power. As a light-free device, the fiber attenuator is used for debugging optical power performance in optical communication system, calibration correction of optical fiber instrument, and attenuation of optical fiber signal. The product is made of decaying fiber mixed with metal ions, which adjusts the optical power to the desired level.