IEC TR 62547:2009

Guidelines for the measurement of high-power damage sensitivity of single-mode fibres to bends - Guidance for the interpretation of results

IEC/TR 62547:2009(E) is a technical report that describes two methods for the measurement of the sensitivity of single-mode optical fibres to high-power damage at bends.
- Method 1 - Failure time characterization as a function of the launch power and bend conditions (bend angle and bend diameter).
- Method 2 - Equilibrium temperature measurement.

General Information

• Status: Published
• Publication Date: 16-Mar-2009
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86A - Fibres and cables
• Drafting Committee: WG 1 - TC 86/SC 86A/WG 1
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 16-May-2013

Relations

• Revised: IEC TR 62547:2013 - Guidelines for the measurement of high-power damage sensitivity of single-mode fibre to bends - Guidance for interpretation of results
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC/TR 62547 ®
Edition 1.0 2009-03
TECHNICAL
REPORT
Guidelines for the measurement of high-power damage sensitivity of single-
mode fibres to bends – Guidance for the interpretation of results

IEC/TR 62547:2009(E)
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IEC/TR 62547 ®
Edition 1.0 2009-03
TECHNICAL
REPORT
Guidelines for the measurement of high-power damage sensitivity of single-
mode fibres to bends – Guidance for the interpretation of results

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
W
ICS 33.180.10 ISBN 978-2-88910-762-9
– 2 – TR 62547 © IEC:2009(E)
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Background .7
4 Test procedures .8
4.1 Safety .8
4.1.1 Safety issues.8
4.1.2 Eye safe working .9
4.1.3 Risk of fire / flame .9
4.1.4 Risk of atmospheric pollution from coating by-products .9
4.1.5 Risk of fibre fuse initiation .9
4.1.6 Risk of damage to downstream components .9
4.1.7 Risk avoidance .9
4.2 General .10
4.3 Apparatus.10
4.3.1 Light source.10
4.3.2 Isolator .10
4.3.3 Bend jig .11
4.3.4 Receiver.11
4.3.5 Attenuator .11
4.3.6 Computer .11
4.3.7 Camera .11
4.3.8 Thermal imaging camera .11
4.3.9 Oven .11
4.3.10 Sample.11
4.4 Test Method 1. Failure time characterization as a function of the launch
power and bend conditions (bend angle and diameter) .12
4.4.1 Description and procedure.12
4.4.2 General comments and conclusions on test Method 1.13
4.4.3 Reported items for test Method 1.14
4.5 Test Method 2 – Equilibrium temperature measurement .14
4.5.1 General .14
4.5.2 Coating heating measurements and power lost at bend .15
4.5.3 Analysis – Test Method 2: Equilibrium temperature .16
4.5.4 Test conditions for test Method 2.18
4.5.5 Conclusions on test Method 2.18
4.5.6 Reported items for test Method 2.19
5 Conclusions.19
Annex A (informative) Robustness of fibres against damage from exposure to high-
power at bends .21
Bibliography.39

Figure 1 – An example of experimental layout.10
Figure 2 – Damage results for fibre type ‘G’.12

TR 62547 © IEC:2009(E) – 3 –
Figure 3 – Example of time evolution of loss power and maximum temperature reached
by the coating at the apex when high-power is launched (P = 3,2W, Bend diameter = 5
mm, λ = 1360 nm Reference [10]) .14
Figure 4 – Sample FLIR camera output of the fibre bent under high-power. The cross-
mark indicates the location of the maximum temperature .15
Figure 5 – Evolution of the coating equilibrium temperature as a function of launched
power (see reference [10]) .16
Figure A.1 – Clamping arrangements for high-power damage testing in 180° bends.23
Figure A.2 – Clamping arrangement for high-power damage testing in 90° bends .23
Figure A.3 – Typical R1 failure characteristics with a loss of greater than 10 dB .24
Figure A.4 – Typical R2 failure characteristics .24
Figure A.5 – A schematic illustration of the 3 regimes in the first fibres tested .24
Figure A.6 – Monitor signal changes – typical for a R1 failure .25
Figure A.7 – Monitor signal changes – typical for a R2 failure .25
Figure A.8 – Damage results for fibre type ‘D’.26
Figure A.9 – High-power damage results at 90° and 180° for fibre ‘D’ .26
Figure A.10 – Time to failure versus bend diameter at different launched powers. .27
Figure A.11 – Bend loss performance at 180° (and 90° for reference) for fibre ‘D’ (see
Clause A.7 for a full discussion).28
Figure A.12 – Power limitation for primary coated fibre .28
Figure A.13 – Comparison of power limitation for primary and secondary coated fibre D.29
Figure A.14 – Maximum optical power ensuring a 25 year lifetime and 180° bend loss
versus bend diameter (from reference [10]) .30
Figure A.15 – Maximum optical power ensuring a 25 year lifetime versus 180° bend
loss .30
Figure A.16 – 180° 2-point OSA Bend Loss for fibre ‘D’ .32
Figure A.17 – 180° 2-point bend loss at 1 480 nm for fibre ‘D’.32
Figure A.18 – 2-point bend loss for fibre ‘D’ at various angles.33
o
Figure A.19 – 180 2-point bend loss at 1 480 nm for a range of fibres .34
Figure A.20 – Time to failure versus inverse of equilibrium temperature for bend
diameters varying from 4 mm to 10mm and launched power in the range 0,8 W-3,2 W .35
Figure A.21 – The effect of baking primary coated fibre ‘C’ (reference [14]) in an oven
at constant temperature .36
Figure A.22 – Time to failure for different coatings as a function of bend radius
(upward arrow indicates a test which was survived by the fibre).38

Table A.1 – Time to failure vs coating refractive index .37

– 4 – TR 62547 © IEC:2009(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GUIDELINES FOR THE MEASUREMENT OF HIGH-POWER
DAMAGE SENSITIVITY OF SINGLE-MODE FIBRES TO BENDS –
GUIDANCE FOR THE INTERPRETATION OF RESULTS

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