The FC Type Variable Fiber Optic Attenuator is an adjustable optical attenuator that uses an FC connector, commonly applied in fiber optic communication systems, testing equipment, and fiber sensing applications. Its primary function is to precisely control the attenuation of optical signals, either manually or automatically, preventing signal overload or distortion and optimizing system performance. The FC connector provides high mechanical strength and stable optical alignment, ensuring reliable signal transmission. This attenuator is highly useful in scenarios where flexible power adjustment is required, helping to maintain efficient operation of fiber optic networks.