New LC Fiber Optic LC/UPC-5DB Optical Attenuator LC-UPC Fiber Attenuator 5dB Singlemode Fixed Fiber Optical Attenuator. The optical attenuators mainly used in fiber optic to debug optical power performance & optical instrument calibration correction & fiber signal attenuation to ensure the optical power in a stable and desired level in the link without any changes on its original transmission wave.. Used for attenuation of input optical power, avoiding distortion caused by optical receiver due to excessive input optical power..Application:The optical attenuator is widely used in fiber optic communication systems, fiber optic CATV, high power optical device measurement. Attenuator db:5dB . Fiber Connector:LC/UPC. Quantity: 1 PCS