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IEC 61300-3-7
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-7: Examinations and measurements – Wavelength dependence of
attenuation and return loss of single mode components
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IEC 61300-3-7
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-7: Examinations and measurements – Wavelength dependence of
attenuation and return loss of single mode components
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.20 ISBN 978-2-8322-9989-0
– 2 – IEC 61300-3-7:2021 © IEC 2021
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, abbreviated terms and quantity symbols . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
3.3 Quantity symbols . 9
4 General description . 9
4.1 General . 9
4.2 Light source and detector conditions . 9
4.3 General explanation of attenuation and return loss . 10
4.3.1 Attenuation . 10
4.3.2 Return loss . 10
4.4 Device under test (DUT) . 11
4.5 Measurement methods . 12
5 Apparatus . 12
5.1 General . 12
5.2 Optical source . 13
5.2.1 Method A – Broadband light source (BBS) . 13
5.2.2 Method B – Tuneable narrowband light source (TNLS) . 13
5.2.3 Method C – Set of multiple fixed narrowband light sources (NLS) . 13
5.3 Depolarizer . 13
5.4 Power detection systems . 14
5.4.1 Method A – Tuneable narrowband detection (TND) . 14
5.4.2 Method B and C – Broadband detection (BBD) . 14
5.5 Branching device (BD) . 15
5.6 Termination . 15
5.7 Temporary joint (TJ) . 15
5.8 Test patch cord . 15
5.9 Reference plugs (RP). 16
5.10 Reference adapters (RA) . 16
6 Procedure . 16
6.1 Method A – Broadband light source . 16
6.1.1 Method A1 – Attenuation only . 16
6.1.2 Method A2 – Attenuation and return loss . 17
6.2 Method B – Tuneable narrowband light source . 20
6.2.1 General . 20
6.2.2 Method B – Attenuation only . 21
6.2.3 Method B – Attenuation and return loss . 21
6.3 Method C – Set of multiple fixed narrowband light sources . 22
6.3.1 General . 22
6.3.2 Method C1 – Attenuation only . 22
6.3.3 Method C2 – Attenuation and return loss . 22
7 Test results . 23
8 Details to be reported . 23
8.1 General . 23
8.2 Total measurement system . 24
8.3 Source . 24
8.3.1 Broadband light source . 24
8.3.2 Tuneable or discrete narrowband light source . 24
8.3.3 Depolarizer . 24
8.4 Detection system . 24
8.4.1 Optical power meter. 24
8.4.2 Optical spectrum analyzer . 24
8.4.3 Branching device . 25
8.4.4 Termination . 25
8.4.5 Temporary joint . 25
8.4.6 Reference plug . 25
8.4.7 Reference adapter . 25
Annex A (informative) Types of passive optical components . 26
Annex B (informative) Typical light source characteristics . 27
B.1 General . 27
B.2 Broadband light source . 27
B.3 Tuneable laser source . 27
Annex C (informative) Terminations . 29
Bibliography . 31
Figure 1 – Generic explanation of attenuation and return loss . 11
Figure 2 – Method A1, attenuation-only, reference measurement set-up . 16
Figure 3 – Method A1, attenuation-only, DUT measurement set-up . 17
Figure 4 – Method A2, attenuation and return loss, reference branching device
measurement set-up . 18
Figure 5 – Method A2, attenuation and return loss, reference measurement set-up. 18
Figure 6 – Method A2, system background measurement set-up . 19
Figure 7 – Method A2, attenuation and return loss, DUT measurement set-up . 20
Figure 8 – Method B, tuneable narrowband light source with and without depolarizer . 21
Figure 9 – Method C, multiple fixed narrowband sources set-up . 22
Figure 10 – Example wavelength dependent attenuation plot . 23
Table 1 – Device under test categories . 11
Table 2 – Measurement methods . 12
Table 3 – Reference test methods . 12
Table 4 – Preferred OPM parameters . 15
Table 5 – Steps of method A1, attenuation only . 16
Table 6 – Steps of method A2, attenuation and return loss . 17
Table 7 – Steps of method B, attenuation only . 21
Table 8 – Steps of method B, attenuation and return loss . 21
Table 9 – Steps of method C, attenuation only . 22
Table 10 – Steps of method C2, attenuation and return loss . 22
– 4 – IEC 61300-3-7:2021 © IEC 2021
Table 11 – Example report for wavelength dependent attenuation and return loss . 23
Table A.1 – Functional summary of common passive optical components . 26
Table B.1 – Types of broadband light source (BBS) and main characteristics . 27
Table B.2 – Types of tuneable light source (TLS) and main characteristics . 28
Table C.1 – Impact on termination values on measured return loss . 29
Table C.2 – Impact on termination values on measured return loss uncertainty . 30
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –
Part 3-7: Examinations and measurements – Wavelength dependence
...