BS EN 4533-002 examines the requirements to enable accurate measurement of fibre optic links from the start of life and during the life cycle of the system from installation and through-service. The 2nd part of BS EN 4533-002 will explain the issues associated with optical link measurement and provide techniques to address these issues. BS EN 4533-002 discusses the measurement of key parameters associated with the passive layer (i.e., transmission of light through an optical harness). BS EN 4533-002 does not discuss systems tests e.g., bit error rates.
BS EN 4533-002 outlines the problem of making consistent measurements of component and system loss in short-haul, multi-mode fibre optic harnesses typical of aircraft installations.
BS EN 4533-002 on fibre optic systems is useful for:
It is widely accepted in the aerospace industry that photonic technology has significant advantages over conventional electrical hardware. These include massive signal bandwidth capacity, electrical safety, and immunity of passive fibre-optic components to the problems associated with electromagnetic interference (EMI).
BS EN 4533-002 is intended to give broad guidelines for both professionals and non-experts in the design, installation, and support of fiber-optic systems aboard aeroplanes. More specific sources of information are cited throughout the text as needed.
In BS EN 4533-002, the issue of test and measurement in multimode systems is complicated by the light distribution in the fibre and the relatively short length of installed fibre which typically has several connectors breaks in the harness path (e.g., connectors located at airframe production breaks). The light distribution launched into the fibre to make measurements is critically important for making consistent measurements in multimode systems. BS EN 4533-002 discusses how the launch conditions can be practically controlled to ensure consistency in test and measurement in multimode systems.
EN 4533-002:2017