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BSI PD IEC TR 62285:2023

$142.49

Application guidelines for nonlinear coefficient measuring methods

Published By Publication Date Number of Pages
BSI 2023 26
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
6 FOREWORD
8 1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms and symbols
4.1 Abbreviated terms
9 4.2 Symbols
5 Background and overview of methods
10 6 Apparatus
6.1 General
6.2 Light source
6.3 Input optics
6.4 Input positioner
6.5 Cladding mode stripper
6.6 Output positioner
6.7 Output optics
11 6.8 Computer
7 Samples and specimens
8 Procedure
9 Calculations of interpretation of results
12 10 Results
10.1 Information available with each measurement
10.2 Information available upon request
14 Annex A (normative) Continuous wave dual-frequency method
A.1 General
A.2 Apparatus
A.2.1 Layout of apparatus
Figure A.1 – Output spectral characteristics
15 A.2.2 Sources
A.2.3 Optical signal conditioning
Figure A.2 – Apparatus for method A
16 A.2.4 Power meters
A.2.5 Optical spectrum analyser
A.3 Samples and specimens
17 A.4 Procedure
A.4.1 General
A.4.2 Calibration
A.4.3 Operation
18 A.5 Calculations
A.5.1 Calculate phase values
A.5.2 Confirm assumptions
A.5.3 Complete the calculation
Figure A.3 – Relationship of phase to intensity ratio
19 Figure A.4 – Relationship of phase to power
20 Annex B (normative) Pulsed single-frequency method (PM)
B.1 General
B.2 Apparatus
B.2.1 Layout of apparatus
B.2.2 Source
B.2.3 Optical signal conditioning
Figure B.1 – Test set-up for method B
21 B.2.4 Power meters
B.2.5 Optical pulsewidth measurement
B.2.6 Optical spectrum analyser
B.3 Samples and specimens
Figure B.2 – Output spectra
22 B.4 Procedure
B.5 Calculations
B.5.1 Peak power
B.5.2 Phase shift
B.5.3 Complete the calculations
23 Figure B.3 – Phase vs. peak input power for method B
24 Annex C (informative) Guidance on the selection of fibre test length, power and difference in optical wavelength when using method A
Table C.1 – Fibre characteristics for method A (representative values)
25 Bibliography
BSI PD IEC TR 62285:2023
$142.49