BS EN IEC 61290-4-3:2018
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Optical amplifiers. Test methods – Power transient parameters. Single channel optical amplifiers in output power control
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 30 |
IEC 61290-4-3:2018 applies to output power controlled optically amplified, elementary sub?systems. It applies to optical fibre amplifiers (OFAs) using active fibres containing rare?earth dopants, presently commercially available, as indicated in IEC 61291-1, as well as alternative optical amplifiers that can be used for single channel output power controlled operation, such as semiconductor optical amplifiers (SOAs). The object of this document is to provide the general background for optical amplifiers (OAs) power transients and their measurements and to indicate those IEC standard test methods for accurate and reliable measurements of the following transient parameters: a) transient power response; b) transient power overcompensation response; c) steady-state power offset; d) transient power response time. The stimulus and responses behaviours under consideration include the following: 1. channel power increase (step transient); 2. channel power reduction (inverse step transient); 3. channel power increase/reduction (pulse transient); 4. channel power reduction/increase (inverse pulse transient); 5. channel power increase/reduction/increase (lightning bolt transient); 6. channel power reduction/increase/reduction (inverse lightning bolt transient). These parameters have been included to provide a complete description of the transient behaviour of an output power transient controlled OA. The test definitions defined here are applicable if the amplifier is an OFA or an alternative OA. However, the description in Annex A concentrates on the physical performance of an OFA and provides a detailed description of the behaviour of an OFA; it does not give a similar description of other OA types. Annex B provides a detailed description background of the dynamic phenomenon in output power controlled amplifiers under transient conditions and Annex C details the impact of speed of transient inputs.This second edition cancels and replaces the first edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition: alignment of the measure of amplified spontaneous emission (ASE) relative to signal power with the definition in IEC 61290-3-3. Keywords: optical amplifiers (OAs) power transients This International Standard is to be used in conjunction with IEC 61291-1:2012
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | English CONTENTS |
| 7 | FOREWORD |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions |
| 11 | 3.2 Abbreviated terms |
| 12 | 4 Apparatus 4.1 Test set-up 4.2 Characteristics of test equipment Figures Figure 1 – Power transient test set-up |
| 13 | 5 Test sample 6 Procedure 6.1 Test preparation |
| 14 | 6.2 Test 7 Calculations Table 1 – Template for transient control measurement test conditions |
| 15 | 8 Test results 8.1 Test setting conditions Figure 2 – OA output power transient responseof a) input power increase and b) decrease |
| 16 | 8.2 Test data |
| 17 | Annex A (informative) Overview of power transient events in single channel EDFA A.1 Background A.2 Characteristic input power behaviour |
| 18 | Figure A.1 – Example OA input power transient cases for a receiver application |
| 19 | Figure A.2 – Input power measurement parameters |
| 20 | A.3 Parameters for characterizing transient behaviour Figure A.3 – OA output power transient response |
| 21 | Annex B (informative) Background on power transient phenomena in a single channel EDFA B.1 Amplifier chains in optical networks B.2 Typical optical amplifier design |
| 23 | B.3 Approaches to address detection errors |
| 25 | Figure B.1 – Transient response to input power drop |
| 26 | Figure B.2 – Transient response to input power rise |
| 27 | Annex C (informative) Slew rate effect on transient gain response |
| 28 | Bibliography |
