What is BS EN 61280-2-10- Fibre optic communication subsystem about?
BS EN 61280-2-10 is a part of an international multi-series standard that deals with test procedures for fibre optic communication subsystem. BS EN 61280-2-10 discusses the time-resolved chirp and alpha-factor measurement of laser transmitters.
BS EN 61280-2-10 sets forth standard procedures for measuring time-resolved chirp (TRC) on laser transmitters. The calculation of alpha-factor, a measure of transient chirp, is derived from the measured TRC data.
BS EN 61280-2-10 also covers a means to verify the TRC set-ups and calculations (Annex A) and a review of laser modulation methods and the relationship between TRC to performance in a transmission system.
Who is BS EN 61280-2-10- Fibre optic communication subsystem for?
BS EN 61280-2-10 on fibre optic communication subsystem is relevant to:
- Developers and installers of laser transmitters
- Manufacturers and suppliers of laser transmitters
- Designers of laser transmitters
- Developers and installers of fibre optic communication subsystem
- Fibre optic system designers
- Telecommunications industries
- Testing authorities
Why should you use BS EN 61280-2-10- Fibre optic communication subsystem?
Understanding the effects of the chirp on the transmission of signals is of great importance to the system designer. Chirp can have two separate outcomes in transmission systems. The first is that the chirp can interact with the fibre dispersion to broaden or narrow the pulse along with the fibre. The second is that chirp can broaden the transmitted spectrum limiting the channel spacing by interfering with adjacent channels in an ultra-dense WDM environment, even at short-haul distances.
BS EN 61280-2-10 provides you with test methods such as the frequency discriminator method, monochromator method, etc. for the measurement of the chirp. BS EN 61280-2-10 also explains the alpha-factor calculations for laser transmitters, as the sign of the penalty depends upon both the sign of the chirp and the sign of the fibre dispersion. Measuring chirp penalty directly is difficult because it requires a chirp-free transmitter with the identical intensity pattern as the device under test (DUT). Thus, BS EN 61280-2-10 leads many transmitter and system designers as well as manufacturers to estimate the chirp (or dispersion) penalty using time-resolved chirp data directly or with derived chirp parameters that are either modelled or measured. BS EN 61280-2-10 proves to be beneficial to its users as it contributes to designing the lower cost transmitters that enables bringing the cost of DWDM transmission systems down.
Overall, BS EN 61280-2-10 is useful to users as it provides guidance on time-resolved chirp and alpha-factor measurement of laser transmitters, as controlling the amount of chirp present in these lower cost transmitters is key to their success in the network.
