What is BS EN 61290-4-1 - Gain transient parameters- Two-wavelength method about?
BS EN 61290-4-1 is a safety standard on the two-wavelength method for the gain transient parameters.
BS EN 61290-4-1 applies to optical amplifiers (OAs) using active fibres (optical fibre amplifiers (OFAs)) containing rare-earth dopants including erbium-doped fibre amplifiers (EDFAs) and optically amplified elementary sub-systems. These amplifiers are commercially available and widely deployed in service provider networks.
The object of BS EN 61290-4-1 is to provide the general background for OFA transients and related parameters, and to describe a standard test method for accurate and reliable measurement of the following transient parameters:
- Channel addition or removal transient gain overshoot and transient net gain overshoot
- Channel addition or removal transient gain undershoot, and transient net gain undershoot
- Channel addition or removal gain offset
- Channel addition or removal transient gain response time constant (settling time)
Who is BS EN 61290-4-1 - Gain transient parameters- Two-wavelength method for?
BS EN 61290-4-1 on the two-wavelength method for the gain transient parameters is relevant to:
- Service providers of optical amplifiers (OAs)
- Testing authorities
- Manufacturers of measurement apparatus
- Manufacturers of network equipment
- Manufacturers of spectrophotometer
Why should you use BS EN 61290-4-1 - Gain transient parameters- Two-wavelength method?
BS EN 61290-4-1 is devoted to optical amplifiers (OAs).
The technology of OAs is quite new and still emerging; hence amendments and new editions to BS EN 61290-4-1 can be expected. BS EN 61290-4-1 assists with the background information on the transient phenomenon in erbium-doped fibre amplifiers and the consequences on fibre optic systems. BS EN 61290-4-1 provides guidance on the slew rate effects. BS EN 61290-4-1 describes the optical signal that remains after a drop event. BS EN 61290-4-1 shows typical measurement conditions and transient control measurement results of C-band OFAs. The measurement conditions include gain, surviving channel wavelength, input power, transient type (e.g., 3 dB drop, 1 dB add), and different transient parameters. Optical power transients are sub-millisecond fluctuations in network power levels that are caused by events such as channel loading changes, passive loss variations, and network protection switching.
Overall, BS EN 61290-4-1 is useful as it helps with the parameters used to characterize the transient gain behaviour of a gain-controlled OFA.
What’s changed since the last update?
BS EN 61290-4-1:2016 supersedes BS EN 61290-4-1:2011 which is withdrawn.
BS EN 61290-4-1:2016 replaces the first edition published in 2011. BS EN 61290-4-1:2016 constitutes a technical revision. BS EN 61290-4-1:2016 includes the following significant technical changes with respect to the previous edition:
- Extended the applicability from only EDFAs to all OFAs
- Updated definitions for consistency with other documents in the IEC 61290-4 series
