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GB/T 15972.48-2016 English PDF

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GB/T 15972.48-2016: Specifications for optical fibre test methods -- Part 48: Measurement methods and test procedures for transmission and optical characteristics -- Polarization mode dispersion
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Basic data

Standard ID GB/T 15972.48-2016 (GB/T15972.48-2016)
Description (Translated English) Specifications for optical fibre test methods -- Part 48: Measurement methods and test procedures for transmission and optical characteristics -- Polarization mode dispersion
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard M33
Classification of International Standard 33.180.10
Word Count Estimation 35,388
Date of Issue 2016-04-25
Date of Implementation 2016-11-01
Older Standard (superseded by this standard) GB/T 18900-2002
Quoted Standard GB/T 9771.1; GB/T 9771.2; GB/T 9771.3; GB/T 9771.4; GB/T 9771.5; GB/T 9771.6; GB/T 9771.7; IEC/TR 61282-3-206; IEC/TR 61282-9-2006
Adopted Standard IEC 60793-1-48-2007, NEQ
Regulation (derived from) National Standard Announcement No
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 15972.48-2016: Specifications for optical fibre test methods -- Part 48: Measurement methods and test procedures for transmission and optical characteristics -- Polarization mode dispersion



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Specifications for optical fiber test methods - Part 48. Measurement methods and test procedures for transmission and optical characteristics - Polarization mode dispersion ICS 33.180.10 M33 National Standards of People's Republic of China Replace GB/T 18900-2002 Specification for optical fiber test methods Part 48. Measurement of transmission characteristics and optical properties Methods and test procedures Polarization mode dispersion Part 48. Measurementmethodsandtestproceduresfortransmission (IEC 60793-1-48..2007, Opticalfibres-Part 1-48. Measurementmethods andtestprocedures-Polarizationmodedispersion, NEQ) 2016-04-25 release.2016-11-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China China National Standardization Management Committee released Directory Preface III Introduction Ⅴ 1 Scope 1 2 normative reference document 1 3 Terms and definitions 1 4 acronym 2 5 Overview 3 6 Test device 5 7 Sample and sample preparation 6 8 Measure Step 7 9 Calculation method 8 10 results 8 Appendix A (normative appendix) Stokes parameter determination 9 Appendix B (Normative Appendix) Intervention 13 Appendix C (Normative Appendix) Fixed Analyzer Method 20 Appendix D (informative) Method of determining the root mean square (RMS) width from the striped envelope

Foreword

GB/T 15972 "Optical fiber test method specification" consists of several parts, its expected structure and the corresponding international standards. Part 10 to Part 19. General Methods of Measurement and Test Procedures (corresponding to IEC 60793-1-10 to IEC 60793-1-19); Part 20 to 29. Measurement methods and test procedures for dimensional parameters (corresponding to IEC 60793-1-20 to IEC 60793-1-29); Part 30 to Part 39. Measurement of mechanical properties and test procedures (corresponding to IEC 60793-1-30 to IEC 60793-1-39); Part 40 to 49. Measurement and test procedures for transmission characteristics and optical properties (corresponding to IEC 60793-1-40 to IEC 60793-1-49); Part 50 to Part 59. Measurement methods and test procedures for environmental performance (corresponding to IEC 60793-1-50 to IEC 60793-1-59). Section 40 to 49 of GB/T 15972 are as follows. - Part 40. Measurement methods and test procedures for attenuation of transmission characteristics and optical properties; - Part 41. Measurement methods and test procedure bandwidth for transmission characteristics and optical properties; - Part 42. Measurement methods and test procedures for transmission characteristics and optical properties - Wavelength dispersion; - Part 43. Measurement methods and test procedures for transmission characteristics and optical properties - Numerical aperture; - Part 44. Measurement methods and test procedures for transmission characteristics and optical properties - Cutoff wavelengths; - Part 45. Measurement methods and test procedures for transmission characteristics and optical properties - Modal field diameter; - Part 46. Measurement methods and test procedures for transmission characteristics and optical properties - Transmittance changes; - Part 47. Measurement methods and test procedures for transmission characteristics and optical properties - Macro loss; - Part 48. Measurement methods and test procedures for transmission characteristics and optical properties - Polarization mode dispersion; - Part 49. Measurement methods and test procedures for transmission characteristics and optical characteristics - Differential mode delay. This part is part 48 of GB/T 15972. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part of the GB/T 18900-2002 "single-mode optical fiber polarization mode dispersion test method", this part and GB/T 18900-2002 Compared to the main technical changes as follows. - non-equivalent use of international standards from "ITU-TG.650..2000" to "IEC 60793-1-48..2007" (see cover, preface); --- Added introductory (see introduction); The addition of the link polarization mode dispersion coefficient statistical parameters (PMDQ) in terms and definitions (see Chapter 3;.2002 edition, Chapter 3); - modified the typical value of the tension in the specimen, and changed the "typical value < 0.15N" to "typical value < 0.05N" (see 7.3.22; Version 5.3, 6.3, 7.3, 8.3); --- 4 kinds of measurement methods are modified to 3 (the polarization method into the Stokes parameter measurement method, as a third analysis method) And the detailed provisions of the three measurement methods are given in the form of appendices (see Appendix A, Appendix B, Appendix C;.2002 edition Chapter 5, Chapter 6, Chapter 7, Chapter 8); - Add the Common Interference Analysis (GINTY) method in Appendix B Interference (INTY) method (see Appendix B;.2002, Chapter 7); - Appendix C adds the cosine Fourier transform (CFT) method to the fixed analyzer (FA) method (see Appendix C;.2002, Chapter 8). This section uses the re-drafting method for reference IEC 60793-1-48..2007 "Fiber Section 1-48. Measurement Methods and Test Procedures Vibration and dispersion ", and IEC 60793-1-48..2007 consistency is non-equivalent, this part compared with IEC 60793-1-48..2007 The main changes are as follows. --- the IEC version of the term PMDQ English "LinkPMDvalue" unified "LinkPolarizationModeDisper- sion "; - the "Stokesevaluationmethod" in the IEC version is a "Stokes parameter determination" --- corrects the error in C.1.3 of Appendix C of the IEC version, and the "TINTY, analyzer should be able to rotate to the initial state Orthogonal position "is modified to" for GINTY, the analyzer should be able to rotate to a position that is orthogonal to the initial state "; --- Method B, Method C, Method A in the IEC version should be changed to the method one, method two, method three, order rearrangement in this part. Please note that some of the contents of this document may involve patents. The issuer of this document does not assume responsibility for the identification of these patents. This part is made by the Ministry of Industry and Information Technology of the People's Republic of China. This part is headed by the National Communications Standardization Technical Committee (SAC/TC485). This part of the drafting unit. Wuhan Posts and Telecommunications Research Institute, Beijing University of Posts and Telecommunications, Jiangsu Hengtong Photoelectric Co., Ltd., Jiangsu transit technology Co., Ltd. The main drafters of this part. Liu Cheng, Li Chunsheng, Qi Qingqing, Lei Fei, Li Hongqiang, Cao Shanshan, Wang Dongxiang, Huang Lan. This part of the previous version of the standard to replace the release of the situation. --- GB/T 18900-2002.

Introduction

Polarization mode dispersion (PMD) in the time domain will cause the optical pulse of the broadening, may weaken the performance of communication systems, this effect with the signal Of the different polarization components of the differential phase, the group rate and the corresponding arrival time δτ related. For a sufficiently narrowband light source, this is the case (DGD) Δτ between the main polarization states of a pair of orthogonal polarizations of a given wavelength. For broadband transmission, this time The delay causes the output pulse to extend in the time domain. At this point, the extension is related to the average of DGD. In long fibers, DGD is a random function of time and wavelength, which depends on the specific situation of the entire fiber birefringence. DGD at any time The temperature and mechanical disturbances of the interchangeable fibers are also very sensitive. Thus, an effective method of characterizing PMD in long fibers is to use the desired value < Δτ>, or the DGD average over the entire wavelength. In principle, for a given fiber, the expected value < Δτ> is different from the parameter δτ or Δτ The same will not change with time or light source. In addition, < Δτ> can also make an effective prediction of the performance of lightwave systems. PMD is used for two polarized modes with a general description of different group rates and can also be used for detailed descriptions of expected values < Δτ>. DGD value Δτ Or the pulse broadening value δτ can be averaged over the entire wavelength, time or temperature range to obtain < Δτ> λ, < Δτ> t or < Δτ> T, respectively. In most In the case of numbers, it is not necessary to distinguish between these different choices to get < Δτ>. The coupling length lc is the length of the coupling that can be evaluated for the two polarization states in the fiber or cable. If the fiber length L satisfies the condition L is much smaller than lc, the mode coupling is negligible, and < Δτ> is proportional to the length of the fiber. The corresponding PMD coefficients are. (Short fiber) PMD coefficient = < Δτ>/L. In the actual system, the fiber is basically satisfied that L is much larger than lc, the state and mode coupling are random. If the mode coupling is also followed The < Δτ> of the machine is proportional to the square root of the fiber length. (Long fiber) PMD coefficient = < Δτ>/L1/2. Specification for optical fiber test methods Part 48. Measurement of transmission characteristics and optical properties Methods and test procedures Polarization mode dispersion

1 Scope

This part of GB/T 15972 specifies the standard test method (RTM) for single-mode fiber polarization mode dispersion (PMD) and other test methods Method, the provisions of the test device, injection conditions, measurement procedures, calculation methods, the results of the unified requirements. This part applies to the GB/T 9771 specified in the Class B uncooled and has been cable single-mode fiber PMD characteristics of the test.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 9771 (all parts) single mode fiber for communication IEC /T R61282-3..2006 Fiber Optic Communication System Design Guidelines Part 3. Calculation of Link Polarization Mode Dispersion (Fibreoptic communicationsystemdesignguides-Part 3. Calculationoflinkpolarizationmodedispersion IEC /T R61282-9..2006 Design guidelines for optical fiber communication systems - Part 9. Measurement and theory of polarization mode dispersion (Fibre flexiblecommunicationsystemdesignguides-Part 9. Guidanceonpolarizationmodedispersionmeasure- mentsandtheory

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Polarization mode dispersion polarizationmodedispersion; PMD The differential group delay (DGD) between two orthogonal polarization modes, which causes pulse broadening in the digital system, reduces the performance of the communication system, Signal distortion in the simulation system. 3.2 Main principal state of the principal state; For single-mode fibers applied at a given time and frequency, there are always two orthogonal polarization states called the main polarization state (PSP). If a quasi-monochromatic light only stimulates a PSP, it does not occur due to PMD-induced pulse broadening; when a quasi-monochromatic light uniformly energizes this When two PSPs, the maximum pulse spread due to PMD will occur. The fiber output of the PSP is two orthogonal polarization states. When entering light When the wave frequency changes slightly, the output polarization does not change, and the corresponding orthogonal polarization state is the input main polarization state. 3.3 Differential group delay differential groupdelay; DGD is the time difference between groups of two PSPs, generally in ps units. 3.4 Polarization mode dispersion value PMDvalue Polarization mode dispersion values include mean polarization mode dispersion (PMDAVG) and root mean square polarization mode dispersion (PMDRMS) two expressions.

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