GB/T 12357.1-2024Multimode optical fibres for telecommunication - Part 1: Sectional specification for category A1 multimode fibres (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting is required.

This document is part 1 of GB/T 12357 Multimode optical fibre for telecommunications. GB/T 12357 has been published in the following parts.

--- Part 1: Characteristics of category A1 multimode optical fibre;

--- Part 2: Characteristics of category A2 multimode optical fibre;

--- Part 3: Characteristics of category A3 multimode optical fibre;

--- Part 4: Characteristics of category A4 multimode optical fibre.

This document replaces GB/T 12357.1-2015 "Multimode optical fibre for telecommunications - Part 1: Characteristics of category A1 multimode optical fibre" Compared with GB/T 12357.1-2015, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Changed the nomenclature of A1a and A1b subclass multimode optical fibers (see Chapter 1, Chapter 1 of the 2015 edition);

b) Added abbreviations (see Chapter 4);

c) Changed the requirements for cladding diameter and cladding non-circularity of A1-OM2, A1-OM3, A1-OM4 and A1-OM5 sub-class multimode optical fibers.

See Table 1, Table 1 of the 2015 edition;

d) Added A1-OM2b, A1-OM3b, A1-OM4b subclass multimode optical fibers and performance requirements (see Chapter 6, Appendix D);

e) Added A1-OM5 subclass multimode optical fiber and performance requirements (see Chapter 6, Appendix D);

f) Added the wavelength of the light source for the core diameter, numerical aperture and differential mode delay tests, as well as the threshold requirements for the core diameter and numerical aperture tests.

Request (see Table 2);

g) Added OMBC as a measure of the modal bandwidth of A1-OM2, A1-OM3, A1-OM4, A1-OM5 subclass multimode fibers Provisions for benchmark test methods (see Table 5);

h) Added 850nm wavelength mode bandwidth and the light source accuracy and length requirements for differential mode delay (see Table 7);

i) Changed the maximum attenuation coefficient requirements for 850nm and 1300nm wavelengths for A1-OM2 subclass multimode optical fibers (see

Table 5, Table 5 of the 2015 edition);

j) Changed the fully injected mode bandwidth requirements for 850nm and 1300nm wavelengths for A1-OM2 subclass multimode fiber (see

Table 5, Table 5 of the 2015 edition).

This document is modified to adopt IEC 60793-2-10:2022 "Optical Fiber Part 2-10.Product Specification Category A1 Multimode Fiber Characteristics".

Compared with IEC 60793-2-10:2022, this document has more structural adjustments. The structural number changes between the two documents are as follows.

See Appendix A for a list.

The technical differences between this document and IEC 60793-2-10:2022 and their reasons are as follows.

a) The normative reference GB/T 15972.20 replaced IEC 60793-1-20 to adapt to my country's technical conditions and improve operability.

Sex;

b) The normative reference GB/T 15972.21 replaced IEC 60793-1-21 to adapt to my country's technical conditions and improve operability.

Sex;

c) The normative reference GB/T 15972.22 replaced IEC 60793-1-22 to adapt to my country's technical conditions and improve operability.

Sex;

d) The normative reference GB/T 15972.30 replaced IEC 60793-1-30 to adapt to my country's technical conditions and improve operability.

Sex;

e) The normative reference GB/T 15972.31 replaced IEC 60793-1-31 to adapt to my country's technical conditions and improve operability.

Sex;

f) The normative reference GB/T 15972.32 replaced IEC 60793-1-32 to adapt to my country's technical conditions and improve operability.

Sex;

g) The normative reference GB/T 15972.33 replaced IEC 60793-1-33 to adapt to my country's technical conditions and improve operability.

Sex;

h) The normative reference GB/T 15972.40 replaced IEC 60793-1-40 to adapt to my country's technical conditions and improve operability.

Sex;

i) The normative reference GB/T 15972.41 replaced IEC 60793-1-41 to adapt to my country's technical conditions and improve operability.

Sex;

j) The normative reference GB/T 15972.42 replaced IEC 60793-1-42 to adapt to my country's technical conditions and improve operability.

Sex;

k) The normative reference GB/T 15972.43 replaced IEC 60793-1-43 to adapt to my country's technical conditions and improve operability.

Sex;

l) The normative reference GB/T 15972.46 replaced IEC 60793-1-46 to adapt to my country's technical conditions and improve operability.

Sex;

m) The normative reference GB/T 15972.47 replaced IEC 60793-1-47 to adapt to my country's technical conditions and improve operability.

Sex;

n) The normative reference GB/T 15972.49 replaced IEC 60793-1-49 to adapt to my country's technical conditions and improve operability.

Sex;

o) The normative reference GB/T 15972.50 replaced IEC 60793-1-50 to adapt to my country's technical conditions and improve operability.

Sex;

p) The normative reference GB/T 15972.51 replaced IEC 60793-1-51 to adapt to my country's technical conditions and improve operability.

Sex;

q) The normative reference GB/T 15972.52 replaced IEC 60793-1-52 to adapt to my country's technical conditions and improve operability.

Sex;

r) The normative reference GB/T 15972.53 replaced IEC 60793-1-53 to adapt to my country's technical conditions and improve operability.

Sex;

s) Added the normative reference document GB/T 14733.12 (see Chapter 2);

t) According to the domestic technical level, the core/cladding of A1-OM2, A1-OM3, A1-OM4, and A1-OM5 sub-class multimode optical fibers have been improved.

Centrality error (see Table 1), tolerance of A1-OM1 subclass multimode fiber core diameter (see Table 1), cladding of A1d subclass multimode fiber the requirements for out-of-roundness (see Table 1) and the dynamic fatigue parameters of A1 multimode optical fiber (see Table 3) have been added.

Requirements (see 6.4.2), see Appendix B for detailed indicator difference comparison table;

u) Added the requirements for the test specimen length of A1-OM5 sub-category multimode optical fiber at 953nm wavelength mode bandwidth and differential mode delay test (See Table 7, footnote a).

The following editorial changes were made to this document.

a) To be consistent with the existing standard system, the name of the standard is changed to "Multimode optical fibre for telecommunications Part 1: Characteristics of multimode optical fibre of category A1" sex";

b) Added Appendix B (Informative) to compare the performance indicators between this document and IEC 60793-2-10:2022;

c) Added the comparison between the sub-class codes of A1 multimode optical fiber in the previous and next versions of this document and the corresponding sub-class codes in the IEC standard, Added the correspondence between the multimode fiber subclass codes in the relevant ITU-T international standards and the corresponding subclass codes in the IEC standards (see Appendix C);

d) The abbreviation "MMF" has been deleted as it is not used in the text (see Chapter 4);

e) In order to maintain the consistency of the context, the original IEC text "OMBC also refers to OM5 subclass multimode fiber 850nm and 953nm wavelength mode bandwidth requirements", changed to "OMBC is also the test method for A1-OM5 sub-class multimode fiber at 850nm and 953 nm" (see Table 7, footnote a).

Introduction

Multimode optical fiber has different geometric characteristics, transmission characteristics, mechanical properties and the environmental performance is different, so according to the refractive index profile shape and cladding/core material differences, multimode optical fibers are divided into A1, A2, A3, and A4.

Four categories.

This document is Part 1 of GB/T 12357.GB/T 12357 "Multimode optical fiber for communication" is divided into the following 4 parts.

--- Part 1: Characteristics of Category A1 multimode optical fibres. The purpose is to give the technical requirements and inspection requirements for Category A1 multimode optical fibres;

--- Part 2: Characteristics of Category A2 multimode optical fibres. The purpose is to give the technical requirements and inspection requirements for Category A2 multimode optical fibres;

--- Part 3: Characteristics of Category A3 multimode optical fibres. The purpose is to give the technical requirements and inspection requirements for Category A3 multimode optical fibres;

--- Part 4: Characteristics of Category A4 multimode optical fibres. The purpose is to give the technical requirements and inspection requirements of Category A4 multimode optical fibres.

Multimode optical fiber for communication Part 1: Characteristics of Category A1 multimode optical fibres

1 Scope

This document specifies the dimensional parameters for A1-OM1, A1-OM2, A1-OM3, A1-OM4, A1-OM5 and A1d subclass multimode optical fibers.

Requirements on number, mechanical properties, transmission characteristics and environmental performance.

This document applies to the design, manufacture and inspection of Category A1 multimode optical fibers used in information transmission equipment and optical cables.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 14733.12 Telecommunications terminology - Optical fiber communications GB/T 15972.20 Specification for optical fiber test methods Part 20: Measurement methods and test procedures for dimensional parameters Optical fiber geometric parameters Number (GB/T 15972.20-2021, IEC 60793-1-20:2014, MOD) GB/T 15972.21 Specification for optical fiber test methods Part 21: Measurement methods and test procedures for dimensional parameters --- Coating layer What parameters (GB/T 15972.21-2008, IEC 60793-1-21:2001, MOD) GB/T 15972.22 Specification for optical fiber test methods Part 22: Measurement methods and test procedures for dimensional parameters --- Length (GB/T 15972.22-2008,IEC 60793-1-22:2001, MOD) GB/T 15972.30 Specification for optical fiber test methods Part 30: Measurement methods and test procedures for mechanical properties Optical fiber screening test Test (GB/T 15972.30-2021, IEC 60793-1-30:2010, MOD) GB/T 15972.31 Specification for optical fiber test methods Part 31: Measurement methods and test procedures for mechanical properties Tensile strength (GB/T 15972.31-2021,IEC 60793-1-31:2019,MOD) GB/T 15972.32 Specification for optical fiber test methods Part 32: Measurement methods and test procedures for mechanical properties Coating strippable (GB/T 15972.32-2021, IEC 60793-1-32:2018, MOD) GB/T 15972.33 Specification for optical fiber test methods Part 33: Measurement methods and test procedures for mechanical properties --- stress corrosion Sensitivity parameters (GB/T 15972.33-2008, IEC 60793-1-33:2001, MOD) GB/T 15972.40 Fiber test method specification Part 40: Measurement methods and test procedures for transmission characteristics and optical characteristics Sequence---Attenuation (GB/T 15972.40-2008, IEC 60793-1-40:2001, MOD) GB/T 15972.41 Specification for optical fiber test methods Part 41: Measurement methods and test procedures for transmission characteristics Bandwidth (GB/T 15972.41-2021,IEC 60793-1-41:2010,MOD) GB/T 15972.42 Fiber test method specification Part 42: Transmission characteristics measurement methods and test procedures Wavelength dispersion (GB/T 15972.42-2021,IEC 60793-1-42:2013,MOD) GB/T 15972.43 Specification for optical fiber test methods Part 43: Measurement methods and test procedures for transmission characteristics Numerical aperture (GB/T 15972.43-2021,IEC 60793-1-43:2015,MOD) GB/T 15972.46 Fiber test method specification Part 46: Measurement methods and test procedures for transmission characteristics and optical characteristics Sequence --- Transmittance change (GB/T 15972.46-2008, IEC 60793-1-46:2001, MOD) GB/T 15972.47 Specification for optical fibre test methods Part 47: Measurement methods and test procedures for transmission characteristics Macrobending loss