Passbandtransmissie

Passbandtransmissie is a term used mainly in optics and telecommunications to describe the amount of signal power that is successfully transmitted through a system within a specified frequency range, called the passband. It is often expressed as a percentage of the input power or in decibels (dB). The concept applies to optical fibres, fibre‐optic amplifiers, radio‑frequency links, and any device that exhibits a frequency‑dependent response.

In fibre‑optic links, passbandtransmissie is determined by a combination of factors. Chromatic dispersion spreads different wavelengths over time, degrading the usable bandwidth. Polarisation mode dispersion and fibre defects add additional loss within the band. Filtering elements, such as dispersion compensating fibres or wave‑guide gratings, can shape the passband and improve transmissie by reducing the out‑of‑band noise. Engineers routinely measure the transmission spectrum with an optical spectrum analyser, identifying the band where the attenuation is lowest. The passband is selected to maximize data rate while keeping the bit‑error rate below an acceptable threshold.

For electronic RF filters, passbandtransmissie indicates how much of the desired signal frequency passes while stop‑band frequencies are suppressed. The design goal is to achieve a flat, high‑transmissie response across the band, which is quantified by the insertion loss and the group delay ripple. Summarily, passbandtransmissie is a key performance metric that reflects how effectively a system preserves signal integrity over its useful frequency range.