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GB/T 15972.45-2021Specifications for optical fibre test methods - Part 45: Measurement methods and test procedures for transmission characteristics - Mode field diameter (English PDF)

光纤试验方法规范第45部分：传输特性的测量方法和试验程序模场直径

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

April 30, 2021

Implementation date

November 1, 2021

Scope

GB/T 15972.45-2021 is the English-translated version of 光纤试验方法规范第45部分：传输特性的测量方法和试验程序模场直径.

GB/T 15972.45-2021 is the Chinese standard "Specifications for optical fibre test methods - Part 45: Measurement methods and test procedures for transmission characteristics - Mode field diameter".

Its scope clause reads: This part of GB/T 15972 specifies the test method for the optical fiber mode field diameter, and establishes the test equipment, injection conditions, procedures, calculations Uniform requirements for methods and results.

This section applies to the measurement of the mode field diameter of Class B single-mode optical fibers. Its clauses include overview of test methods.

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Document preview — GB/T 15972.45-2021

National Standard of the People's Republic of China

Classification: M 33

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
1 Scope
2 Normative references
3 Overview of test methods
4 Test device
5 Samples and sample preparation
6 Test procedure
7 Calculation
8 Results
Appendix A (informative appendix) Structure changes of this part compared with IEC 60793-1-45.2017
Appendix F (informative appendix) Sampling data and calculation results

1 Scope

This part of GB/T 15972 specifies the test method for the optical fiber mode field diameter, and establishes the test equipment, injection conditions, procedures, calculations

Uniform requirements for methods and results.

This section applies to the measurement of the mode field diameter of Class B single-mode optical fibers.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 15972.40-2008 Optical fiber test method specification Part 40.Transmission characteristics and optical characteristics measurement methods and tests

Program attenuation (IEC 60793-1-40.2001, MOD)

3 Overview of test methods

The mode field diameter (MFD) measurement is the cross-sectional range of the electromagnetic field intensity of the guided mode in the fiber cross-section, and the mode field diameter (MFD) is defined as

The integral ratio of the far-field intensity distribution is Petermann's second definition (PetermannII).

The mode field diameter (MFD) can be used in the far field with the far-field light intensity distribution PF (theta), the complementary aperture power transfer function alpha (theta) and the near-field light

The strong distribution f2(r) is measured. The mathematical equivalence between different test methods is shown in Figure 1.

Figure 1 Mathematical transformation relationship between the three test methods of mode field diameter

There are four test methods for measuring the mode field diameter of a single-mode fiber.

---Method A. Direct far-field scanning method;

---Method B. Far-field variable aperture method;

YD/T 2554.1 | GB/T 9771.1 | GB/T 20186.1 | GB/T 15972.48 | GB/T 15972.40 | GB/T 15972.42 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 40 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 15972.40-2008Specifications for optical fibre test methods - Part 40: Measurement methods and test procedures for transmission characteristics - Attenuation

IEC 60793

Cited by

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