Newsroom
What is TID?
(Total Ionizing Dose)
Total Ionizing Dose (TID) is the cumulative amount of ionizing radiation energy absorbed by a material over time. It is commonly expressed in gray (Gy), with one gray corresponding to one joule of absorbed radiation energy per kilogram of material.
TID is an important parameter for assessing the long-term effects of radiation on optical fibers and photonic components. In optical fibers, accumulated ionizing radiation can create defects in the glass and increase optical losses through Radiation-Induced Attenuation (RIA).
HOW Total Ionizing Dose Works
The concept can be understood through three main steps:
Radiation exposure
Ionizing radiation such as X-rays or gamma rays deposits energy in the material.
Cumulative effects
The absorbed radiation progressively modifies the material. In silica optical fibers, radiation can create defects that alter their optical properties.
Dose measurement
The accumulated radiation is quantified as TID, generally in Gy. For radiation-sensitive fibers, the resulting optical attenuation can be calibrated against TID and used for dosimetry
