Meaning
A physical unit of measurement defines the rate of optical signal attenuation through a given transmission medium. Component designers and network engineers monitor decibel loss per millimeter to assess the quality of optical fiber formulations during the production phase. The measurement dictates how far a signal can travel before requiring amplification.
It governs the selection of materials for short range high speed data links.
Signal Attenuation
Light traveling through glass encounters scattering and absorption that diminish its intensity. This reduction in power occurs over distance and is measured continuously. Minimizing this drop ensures that high data rates are maintained across the network.
Product Specification
Purchase agreements for raw optical preforms specify maximum allowable limits for this rate of signal reduction. When a prepreg or glass fiber exceeds the specified decibel loss per millimeter, the buyer holds the right to reject the entire batch. The agreed thresholds determine the grading and pricing of the fiber.
Financial Consequence
Higher attenuation rates necessitate additional hardware such as repeaters and transmitters, which increases the total cost of ownership for the network operator. By specifying a low decibel loss per millimeter, distributors can command premium prices in competitive telecom markets. Low attenuation fiber attracts a higher profit margin.
