BS EN 60793-1-49:2006
$142.49
Optical fibres – Measurement methods and test procedures – Differential mode delay
| Published By | Publication Date | Number of Pages |
| BSI | 2006 | 32 |
Describes a method for characterizing the modal structure of a graded-index multimode fibre. The information is useful for assessing the bandwidth performance of a fibre when used with laser sources. Applies only to multimode, graded-index glass-core (category A1) fibres. The test method is commonly used in production and research facilities, however is not easily accomplished in the field.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | CONTENTS |
| 6 | 1 Scope 2 Normative references |
| 7 | 3 Terms and definitions |
| 8 | 4 Apparatus 4.1 Optical source 4.2 Stability 4.3 Launch system |
| 9 | 4.4 Detection system |
| 10 | 4.5 Computational equipment 5 Sampling and specimens 5.1 Test sample 5.2 Specimen endfaces 5.3 Specimen length 5.4 Specimen packaging 5.5 Specimen positioning 6 Procedure 6.1 Adjust and measure system response |
| 11 | 6.2 Adjust detection system 6.3 Measure the test sample |
| 12 | 7 Calculations and interpretation of results 7.1 Differential mode delay (DMD) 7.2 Minimum calculated effective modal bandwidth |
| 14 | 7.3 Length normalization 8 Documentation 9 Specification information |
| 16 | Annex A (normative) Source spectral width limitation |
| 18 | Table A.1 – Highest expected dispersion for any of the commercially available Category A1 fibres |
| 19 | Annex B (informative) Discussion of measurement details Figure B.1 – Idealized DMD data |
| 23 | Annex C (informative) Determining DMD weights for EMBc calculation |
| 26 | Annex D (informative) EMBc calculation information Table D.1 – DMD weightings – Example set 1 |
| 27 | Table D.2 – DMD weightings – Example set 2 |
| 29 | Annex E (informative) Comparison between this standard and ITU recommendations |
| 30 | Bibliography |
