ДСТУ EN IEC 60793-1-47:2022 Оптичні волокна. Частина 1-47. Методи вимірювання та процедури випробувань. Втрати на макрозгині (EN IEC 60793-1-47:2018, IDT; IEC 60793-1-47:2017, IDT)



ДСТУ EN IEC 60793-1-47:2022
(EN IEC 60793-1-47:2018, IDT; IEC 60793-1-47:2017, IDT)

Оптичні волокна. Частина 1-47. Методи вимірювання та процедури
випробувань. Втрати на макрозгині

 
   
 
 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

FOREWORD

INTRODUCTION

1 Scope

2 Normative references

3 Terms and definitions

4 Apparatus

4.1 Method A - Fibre winding

4.2 Method B - Quarter circle bends

4.3 Input system

4.3.1 Optical source

4.3.2 Optical launch arrangement

4.4 Output system and detection

4.4.1 Optical divider

4.4.2 Optical detector

4.4.3 Optical detection assembly

4.4.4 Signal processing

5 Specimen

5.1 Specimen length

5.1.1 Method A - Fibre winding

5.1.2 Method B - Quarter circle bends

5.2 Specimen end face

6 Procedure

6.1 Method A - Fibre winding

6.1.1 General consideration

6.1.2 Single-mode fibres

6.1.3 Multimode (A1) fibres

6.2 Method B - Quarter circle bends

7 Calculations

8 Results

8.1 Information available with each measurement

8.2 Information available upon request

9 Specification information

Annex A (normative) Change in transmittance by transmitted power technique

A.1 Apparatus

A.1.1 General

A.2 Procedure

A.3 Calculations

Annex B (normative) Cut-back technique

B.1 General

B.2 Apparatus

B.2.1 General apparatus for all fibres

B.3 Procedure

B.4 Calculations

Annex C (normative) Requirements for the optical source characteristics for A1 multimode measurement

C.1 Encircled flux (EF)

C.2 Limits on encircled flux

Annex D (informative) Small bend radius phenomena

D.1 General

D.2 Interference between propagating and radiating modes

D.3 Polarization effects

D.4 High power damage

Annex E (informative) Parallel plate (2-point) macrobend loss approximation

E.1 General

E.2 Specimen

E.3 Apparatus

E.3.1 General

E.3.2 Stepper motor control

E.3.3 Movable plate

E.3.4 Fixed plate

E.4 Procedure

E.5 Calculation

E.6 Results

E.7 Comparison of results with normative test

Bibliography

Figure 1 - Quarter circle guide groove in plate

Figure 2 - General launch arrangement

Figure 3 - Lens system

Figure 4 - Launch fibre

Figure 5 - Mode scrambler (for A4 fibre)

Figure 6 - Multiple bends using stacked plates

Figure A.1 - Measurement of change in optical transmittance using reference specimen

Figure A.2 - Measurement of change in optical transmittance using stabilized source

Figure B.1 - Arrangement of equipment to perform loss measurement at one specified wavelength

Figure B.2 - Arrangement of equipment used to obtain a loss spectrum

Figure C.1 - Encircled flux template example

Figure D.1 - Loss curves versus curve fits

Figure E.1 - Schematic of possible (two-point bend) apparatus

Figure E.2 - Example of applying an exponential fit to the spectral data of a B6_a2 fibre

Figure E.3 - Example of 2-point bend test data for a B6_a2 fibre

Table 1 - Launch conditions for A2 to A4 fibres

Table C.1 - Threshold tolerance

Table C.2 - EF requirements for 50 µm core fibre cabling at 850 nm

Table C.3 - EF requirements for 50 µm core fibre cabling at 1 300 nm

Table C.4 — EF requirements for 62,5 µm core fibre cabling at 850 nm

Table C.5 - EF requirements for 62,5 µm core fibre cabling at 1 300 nm

Table E.1 - Comparison of parallel plate (2-point) versus method A macrobend loss measurement for a B6_b3 fibre at 10 mm diameter (ratio of mandrel / 2-point)