What is PD IEC/TR 61282-8- Fibre optic interconnecting communication system designing about?
PD IEC/TR 61282-8 is the eighth part of an international multi-series standard that covers guidelines to design fibre optic communication systems.
PD IEC/TR 61282-8 provides definitions of dispersion penalty and other related penalties. It describes the direct measurement of these penalties using a BER test set and the calculation of the penalties from time-resolved chirp (TRC) data.
PD IEC/TR 61282-8 provides the theory for power penalty calculations. The calculations are valid for all types of single longitudinal mode (SLM) laser transmitters intended for use in telecommunications applications at data rates of 2.5 Gbit/s and higher with NRZ modulation format. These include but are not limited to directly modulated DFB lasers, DFB lasers with integrated electro-absorption modulators, and DFB lasers with external Mach- Zehnder modulators.
Note1: This technique is not suitable for multiple longitudinal modes (MLM) lasers or LEDs.
Note2: Other power penalty sources, such as nonlinear effects and amplifier noise are not covered by PD IEC/TR 61282-8.
Who is PD IEC/TR 61282-8- Fibre optic interconnecting communication system designing for?
PD IEC/TR 61282-8 on fibre optic communication system designing is relevant to:
- Developers and manufacturers of laser transmitters
- Manufacturers of receiver and fibre
- Telecommunications industries
- Fibre optic technicians
- Fibre optic installers
- Testing authorities
Why should you use PD IEC/TR 61282-8- Fibre optic interconnecting communication system designing?
Dispersion penalty is a commonly used parameter of laser transmitters and is usually included as a specification for transmitters designed for 2.5 Gb/s and higher data rates. The value of the dispersion penalty is a function of the interaction of laser chirp, spectral width and fibre dispersion and depends on the type of fibre.
PD IEC/TR 61282-8 is a technical report that describes the procedure for calculating dispersion penalty from TRC data. PD IEC/TR 61282-8 describes the dispersion penalty, as the type and length of the fibre specified for a particular transmitter are fixed, which helps the users in determining the temporal characteristics of the transmitter chirp, including the spectral characteristics of the laser. PD IEC/TR 61282-8 aids with measuring the dispersion penalty for a transmission link, which depends on the transmitter, receiver, and fibre. It specifies the fibre dispersion and receiver characteristic, on which the dispersion penalty parameter for a transmitter is based. PD IEC/TR 61282-8 also discusses a plot of data that is suitable for calculating the power penalties.
Overall, PD IEC/TR 61282-8 proves very useful to the developers and manufacturers of laser transmitters, as they are attempting to go to higher rates and longer distances. PD IEC/TR 61282-8 helps them mitigate the limitations of chirp and enables them to achieve a required dispersion penalty.
