The step index PMMA POF
The PMMA (poly-methylmetacrylate) core is enclosed by a thin cladding (10/nbsp;µm) made from a fluorinated polymer. Through total reflection the light is guided inside the core.
The lowest attenuation values occur at 520 nm (green), 560 nm (yellow) and 650 nm (red).
Differences in transit time of different rays in the core lead to a broadening of the launched light pulses. Possible bit rates are limited to about 100 Mbit/s over 100 m for SI types (correspondingly higher for shorter distances). Modified index profiles permit higher data transmission rates.
The maximum operational temperature ranges from +70°C up to +85°C, depending on the application.