Variable in-line Fiber Optic Attenuator (Adjustable in-line optical attenuator)  by Veston Limited is used to permit dynamic control of optical power levels in a fiber. Variable in-line Attenuator can be applied to adjust power level of signal in the optical communication at the output of light sources, E/O converters and for the linear or dynamic range of power meter. Furthermore, Variable in-line attenuator can the used in optical amplifier systems to balance the gain across the different operating wavelengths. By using simple adjustment controls, the attenuation can be easily modified to any level required by your specific project.