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What is a Dosimeter?
A dosimeter is a device used to measure the amount of ionizing radiation absorbed by a material or exposed to a specific environment over a given period. In fiber-optic dosimetry, specially designed optical fibers detect radiation through changes in their optical properties, enabling radiation levels or accumulated dose to be monitored.
Fiber-based dosimeters can provide continuous and distributed radiation measurements along an optical fiber. This makes them particularly useful in environments where conventional point-based radiation detectors are difficult to deploy or where spatial mapping of radiation levels is required.
HOW a Dosimeter Works
The operation of a fiber-based dosimeter can be understood through three main steps:
Radiation interaction
Ionizing radiation interacts with the optical fiber and creates changes in the fiber material, such as radiation-induced defects.
Optical response
These changes modify the fiber's optical properties, typically causing increased attenuation or radiation-induced emission.
Dose measurement
An interrogation system measures the resulting optical change and converts it into a radiation dose or dose-rate measurement using a previously established.
