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BSI 23/30461659 DC:2023 Edition

BSI 23/30461659 DC:2023 Edition

$13.70

BS EN IEC 60793-1-22. Optical fibres – Part 1-22. Measurement methods and test procedures. Length measurement

Published By Publication Date Number of Pages
BSI 2023 40
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PDF Catalog

PDF Pages PDF Title
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Overview of method
4.1 Method A – Delay measuring
4.2 Method B – Backscattering
4.3 Method C – Fibre elongation
11 4.4 Method D – Mechanical length
4.5 Method E – Phase shift
4.6 Reference test method
5 Apparatus
7 Procedure
8 Calculations
9 Results
12 10 Specification information
13 Annex A (normative) Requirements specific to method A – Delay measuring
A.1 General
A.2 Principle
A.3 Apparatus
A.3.1 Two techniques
15 A.3.2 Optical source
A.3.2.1 Measurement with the sampling oscilloscope
A.3.2.2 Measurement with a counter or a backscattering apparatus
A.3.3 Optical detector
A.4 Procedure
A.4.1 Calibration
A.4.2 Average group index value
A.4.3 Length measurement
17 A.5 Calculations
A.5.1 Transmitted-pulse technique
A.6 Results
18 Annex B (normative) Requirements specific to method B – Backscattering
B.1 General
B.2 Apparatus
B.2.1 Optical transmitter
19 B.2.2 Launch conditions
B.2.3 Optical splitter
B.2.4 Optical receiver
B.2.5 Pulse duration and repetition rate
B.2.6 Signal processor
B.2.7 Display
B.2.8 Data interface (optional)
20 B.2.9 Reflection controller (optional)
B.2.10 Splices and connectors
B.3 Sampling and specimens
B.4 Procedure
B.4.1 Three techniques
B.4.2 Procedure common to all three techniques
21 B.4.3 Procedures specific to each technique
B.4.3.1 Two-point technique
B.4.3.2 Single-point technique 0
B.4.3.3 Single-point technique 1
23 B.4.4 Determination of group index
24 B.5 Results
25 Annex C (normative) Requirements specific to method C – Fibre elongation
C.1 Principle
C.2 Apparatus
C.2.1 General requirements
C.2.2 Optical measurement equipment
26 C.2.2.1 Phase-shift technique
C.2.2.2 Pulse-delay (time of flight) technique
C.2.3 Instrument resolution
27 C.3 Procedure
C.3.1 Calibration
C.3.2 Specimen measurement
C.4 Results
28 Annex D (normative) Requirements specific to method D – Mechanical length
D.1 Principle
D.2 Apparatus
D.3 Procedure
D.3.1 Calibration
D.3.2 Operation
29 Annex E (normative) Requirements specific to method E – Phase shift
E.1 General
E.2 Apparatus
E.2.1 Light source
E.2.2 Modulator
30 E.2.3 Launch optics
E.2.4 Signal detector and signal detection electronics
E.2.5 Reference signal
E.2.6 Computation equipment
31 E.3 Sampling and specimens
E.4 Procedure
E.4.1 Selection of starting frequency
E.4.2 Selection of maximum frequency
E.4.3 Phase measurement performance
E.4.4 Measurement of length of test fibre
E.4.4.1 Calibration of reference phase
32 E.4.4.2 Measurement of test fibre phase
E.5 Calculation and interpretation of results
E.5.1 Determination of test fibre length
33 E.6 Group index
E.6.1 Introduction
E.6.2 Cut-back method
E.6.3 Substitution method
35 Annex F (informative) Brillouin frequency shift test method
F.1 General
F.2 Principle
36 F.3 Apparatus
F.3.1 General requirements
F.3.2 Optical measurement equipment
F.3.2.1 General
F.3.2.2 BOTDR
37 F.3.2.3 BOTDA
F.3.3 Instrument resolution
F.4 Procedure
F.4.1 Calibration
38 F.4.2 Specimen measurement
39 F.5 Results
40 Bibliography

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BSI 23/30461659 DC
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