GB/T 9771.7-2022Single-mode optical fibres for telecommunication—Part 7: Characteristics of a bending loss insensitive single-mode optical fibre (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.

This document is part 7 of GB/T 9771 "Single-mode Optical Fiber for Communication". GB/T 9771 has issued the following parts.

--- Part 1: Non-dispersion-shifted single-mode fiber characteristics;

--- Part 2: Cutoff wavelength shifted single-mode fiber characteristics;

--- Part 3: Characteristics of non-dispersion-shifted single-mode fiber with extended wavelength range;

--- Part 4: Dispersion-shifted single-mode fiber characteristics;

--- Part 5: Non-zero dispersion shifted single-mode fiber characteristics;

--- Part 6: Characteristics of non-zero dispersion single-mode fiber for wide-wavelength optical transmission;

--- Part 7: Bending loss insensitive single-mode fiber characteristics.

This document replaces GB/T 9771.7-2012 "Single-mode optical fibers for communications - Part 7: Bending loss-insensitive single-mode optical fibers for access networks Compared with GB/T 9771.7-2012, except for structural adjustment and editorial changes, the main technical changes are as follows.

---Changed the scope of application of the standard, and deleted the limitation of "for access network" in the application scenario of optical fiber cable (see Chapter 1);

--- Change the applicable range of wavelengths of B6b2 and B6b3 fibers from three separate wavelengths of 1310nm, 1550nm and 1625nm Change to apply to O, E, S, C and L entire band (1260nm~1625nm) (see Chapter 5, Chapter 5 of the 2012 edition chapter);

--- Added amendment rules (see Chapter 6);

--- Added the size parameter requirements for optical fibers with a coating diameter specification of 200 µm (see 7.1.1);

--- Change optical characteristics and transmission characteristics to transmission characteristics (see 7.2, 6.2 of the 2012 edition);

--- Changed the attenuation coefficient requirements of B6b2 and B6b3, added footnotes 1310nm~1625nm, 1530nm~ Requirements for the maximum value of the attenuation coefficient at 1565nm (see 7.2.3, 6.2.3 of the 2012 edition);

--- Increased the calculation formula of the dispersion coefficient limit, changed the zero dispersion slope range of B6a1 and B6a2, increased 1550nm, For the range of 1625nm dispersion coefficient, the requirements for dispersion characteristics of B6b2 and B6b3 are added (see 7.2.4, 6.2.4 of the 2012 edition);

--- Changed the requirements for the mode field diameter (see 7.2.5, 6.1.1 of the 2012 edition);

--- Increased attenuation wavelength characteristics and attenuation uniformity requirements (see 7.2.7, 7.2.8);

---Changed the tension value corresponding to the screening stress (see 7.3.1, 6.3.1 of the 2012 edition);

--- Changed the tensile strength requirements, deleted the tensile strength requirements for gauge lengths of 1m, 10m, and 20m (see 7.3.2, 2012 edition 6.3.2);

--- Added the peeling force requirements for the optical fiber coating with a coating diameter of 200 µm (see 7.3.4, 7.4.3);

--- Increased environmental test 1625nm wavelength light attenuation requirements (see 7.4.2).

Introduction

According to the current classification of single-mode optical fibers at home and abroad, GB/T 9771 "Single-mode Optical Fiber for Communication" is divided into the following parts.

--- Part 1: Non-dispersion-shifted single-mode fiber characteristics;

--- Part 2: Cutoff wavelength shifted single-mode fiber characteristics;

--- Part 3: Characteristics of non-dispersion-shifted single-mode fiber with extended wavelength range;

--- Part 4: Dispersion-shifted single-mode fiber characteristics;

--- Part 5: Non-zero dispersion shifted single-mode fiber characteristics;

--- Part 6: Characteristics of non-zero dispersion single-mode fiber for wide-wavelength optical transmission;

--- Part 7: Bending loss insensitive single-mode fiber characteristics.

Combining the requirements of system design and the development of related devices, bending loss insensitive single-mode fiber is suitable for Dense wiring in indoor narrow environment can give full play to the advantages of high bandwidth and low attenuation of single-mode fiber. With the continuous promotion of FTTx Furthermore, bending loss insensitive single-mode fiber has been widely used at home and abroad. The geometrical, optical and transmission characteristic parameters of optical fibers in this document Tested the provisions of G.657.A1, G.657.A2, G.657.B2 and G.657.B3 optical fiber characteristics in ITU-TG 657.2016, the mechanical The mechanical and environmental performance refers to the provisions of B6 optical fiber in IEC 60793-2-50:2018. Single-mode optical fiber for communication - Part 7. Bending Loss Insensitive Single Mode Fiber Characteristics

1 Scope

This document specifies the bending loss insensitive single-mode optical fiber used in communication optical cables and other information transmission equipment (hereinafter referred to as B6 type)

Requirements such as size parameters, transmission characteristics, mechanical properties and environmental performance of single-mode optical fiber), describe the corresponding test methods and numerical rounding off rule.

This document applies to the design, development, production and testing of B6 single-mode optical fibers.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 8170 Numerical rounding off rules and expression and determination of limit values

GB/T 15972 (all parts) Specifications for optical fiber test methods

YD/T 1065.2-2015 Test Method for Polarization Mode Dispersion of Single Mode Optical Fiber Part 2: Link Polarization Mode Dispersion Coefficient (PMDQ)

The statistical calculation method of ITU-TG 650.1.2020 Parameter definitions and test methods for single-mode optical fiber cables with linear and deterministic characteristics (Definitions ITU-TG 650.2.2015 Parameter definitions and test methods for single-mode optical fiber cables with statistical and nonlinear characteristics (Definitions 3 Terms and Definitions The terms and definitions defined in GB/T 15972 (all parts), ITU-TG 650.1.2020, ITU-TG 650.2.2015 apply to this document.

4 Abbreviations

The following abbreviations apply to this document. FWM. Four Wave Mixing (FourWaveMixing)

5 Categories

Type B6 single-mode fiber is divided into four subcategories. B6a1, B6a2, B6b2 and B6b3.