DD IEC PAS 61290-3-1:2002 pdf download Optical fibre amplifiers — Basic specification — Part 3-1: Test methods for noise figure parameters — Optical spectrum analyzer
This part of IEC 61290 applies to commercially available optical fibre amplifers (OFAs) using activefibres containing rare-earth dopants, or semiconductor optical amplifiers (SOWs) using laser gainmedia.
The object of this part of IEC 61290 is to establish uniform requirements for accurate and reliablemeasurements, by means of the optical spectrum analyzer test method, of the following OAparameters, as defined in clause 3 of the international standard IEC 61291-1:
a) signal-spontaneous noise figure
b) forward amplified spontaneous emission (ASE) power level
The methods described in this document apply to single-channel stimulus only.
Two alternatives for determining the signal-spontaneous beat noise are possible, namely the ASEdirect interpolation technique (Dl) and the polarization nulling with interpolation technique (PN). Theaccuracy of the Dl technique will suffer when the slope of the OA spectral ASE curve has largewavelength dependence, as in the case of an OA with an internal narrowband ASE suppressing filter.
The accuracy of the Dl technique degrades at high input power level due to the spontaneous emissionfrom the laser source(s). Annex D provides guidance on the limits of this technique for high inputpower.
NOTE 1 – All numerical values followed by ($) are intended to be currently under study.NOTE 2 – General aspects of noise figure test methods are reported in the international standard IEC 61290-3
2Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.
IEC 60793-1-1: Optical fibres – Part 1-1: Generic specification – General
IEC 60825-1: Safety of laser products – Part 1: Equipment classification, requirements and user’sguide
EC 60825-2: Safety of laser products – Part 2: Safety of optical fibre communication systems
IEC 60874-1: Connectors for optical fibres and cables – Part 1: Generic specification
IEC 61290-1-1: Optical amplifier test methods- Basic specification – Test methods for gainparameters – Part 1-1: Optical spectrum analvser
EC 61290-3-1: Optical fibre amplifiers – Basic specification – Part 1-1: Test methods for gainparameters – Optical spectrum analyser
IEC 61291-1: Optical amplifiers – Part 1: Generic specification
NOTE – A list of infommative (not nomative) references is given in annex C
3 Apparatus
Two schemes of the measurement set-up (for DI and PN techniques, respectively), are given in figure 1.
The test equipment listed below, with the required characteristics, is needed.
a) Narrowband optical source:
The optical source shall be either at a fixed wavelength or wavelength tunable.
– Fixed-wavelength optical source:
DD IEC PAS 61290-3-1:2002 pdf download
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