1、 IEC 61300-3-38 Edition 1.0 2012-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-38: Examinations and measurements Group delay, chromatic dispersion and phase ripple Dispositifs dinterconnexion et
2、composants passifs fibres optiques Procdures fondamentales dessais et de mesures Partie 3-38: Examens et mesures Retard de groupe, dispersion chromatique et fluctuation de phase IEC 61300-3-38:2012 colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All righ
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16、ce Clients - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61300-3-38 Edition 1.0 2012-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic interconnecting devices and passive components Basic
17、test and measurement procedures Part 3-38: Examinations and measurements Group delay, chromatic dispersion and phase ripple Dispositifs dinterconnexion et composants passifs fibres optiques Procdures fondamentales dessais et de mesures Partie 3-38: Examens et mesures Retard de groupe, dispersion chr
18、omatique et fluctuation de phase INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE X ICS 33.180.10 PRICE CODE CODE PRIX ISBN 978-2-83220-115-2 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Inter
19、nationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 61300-3-38 IEC:2012 CONTENTS FOREWORD . 5 1 Scope . 7 2 Normative references . 7 3 Terms an
20、d abbreviations 7 4 General description 8 5 Apparatus . 9 5.1 Modulation phase shift method 9 5.1.1 General . 9 5.1.2 Variable wavelength source VWS 9 5.1.3 Tracking filter (optional) . 9 5.1.4 Reference branching device RBD1, RBD2 10 5.1.5 Wavelength monitor (optional) . 10 5.1.6 Device under test
21、DUT . 10 5.1.7 Detectors D1, D2 . 10 5.1.8 RF generator . 11 5.1.9 Amplitude modulator 11 5.1.10 Phase comparator . 11 5.1.11 Temporary joints TJ1, TJ2 11 5.1.12 Polarization controller (optional) 11 5.1.13 Reference jumper 12 5.2 Swept wavelength interferometry method 12 5.2.1 General . 12 5.2.2 Tu
22、nable laser source TLS . 12 5.2.3 Wavelength monitor . 13 5.2.4 Reference branching devices RBD1, RBD2, RBD3 13 5.2.5 Detectors D1, D2 13 5.2.6 Polarization controller 13 5.2.7 Polarization analyzer . 13 5.3 Polarization phase shift method . 13 5.3.1 General . 13 5.3.2 Tunable laser source TLS 14 5.
23、3.3 RF generator . 14 5.3.4 Amplitude modulator 15 5.3.5 Polarization controller 15 5.3.6 Polarization splitter 15 5.3.7 Detectors D1, D2 . 15 5.3.8 Amplitude and phase comparator 16 6 Measurement procedure . 16 6.1 Modulation phase shift method 16 6.1.1 Measurement principle 16 6.1.2 RF modulation
24、frequency . 16 6.1.3 Test sequence . 18 6.1.4 Special notice for measurement of GDR 19 6.1.5 Calculation of relative group delay . 19 6.2 Swept wavelength interferometry method 19 6.2.1 Measurement principle 19 61300-3-38 IEC:2012 3 6.2.2 Test sequence . 20 6.2.3 Special notice for measurement of GD
25、R 20 6.2.4 Calculation of group delay . 20 6.3 Polarization phase shift method . 21 6.3.1 Modulation frequency 21 6.3.2 Wavelength increment . 22 6.3.3 Scanning wavelength and measuring CD . 22 6.3.4 Calibration . 22 6.3.5 Calculation of relative group delay and CD 23 6.4 Measurement window (common
26、for all test methods) . 23 7 Analysis . 25 7.1 Noise reduction of group delay measurement 25 7.1.1 Averaging 25 7.1.2 Spectral filtering 25 7.2 Linear phase variation . 25 7.3 Chromatic dispersion . 25 7.3.1 General . 25 7.3.2 Finite difference calculation . 26 7.3.3 Curve fit 26 7.4 Phase ripple 27
27、 7.4.1 General . 27 7.4.2 Slope fitting . 27 7.4.3 GDR estimation . 27 7.4.4 Phase ripple calculation . 28 8 Examples of measurement . 28 8.1 50GHz band-pass thin-film filter 28 8.2 Planar waveguide filter component 29 8.3 Tunable dispersion compensator (fiber bragg grating) . 30 8.4 Random polariza
28、tion mode coupling device . 30 9 Details to be specified 31 Annex A (informative) Calculation of differential group delay . 32 Bibliography 40 Figure 1 MPS measurement method apparatus 9 Figure 2 SWI measurement method apparatus . 12 Figure 3 PPS measurement method apparatus 14 Figure 4 Sampling at
29、the modulation frequency 18 Figure 5 Measurement window centred on an ITU wavelength with a defined width . 24 Figure 6 Measurement window determined by the insertion loss curve at 3dB 24 Figure 7 Calculated CD from fitted GD over a 25 GHz optical BW centred on the ITU frequency 26 Figure 8 A 6th or
30、der polynomial curve is fitted to relative GD data over a 25 GHz optical BW centred on the ITU frequency 27 Figure 9 Estimation of the amplitude of the GD ripple and the period . 28 Figure 10 GD and loss spectra for a 50 GHz-channel-spacing DWDM filter 28 Figure 11 Measured GD and loss spectra for p
31、lanar waveguide filter . 29 Figure 12 Measured CD and loss spectra for planar waveguide filter . 29 4 61300-3-38 IEC:2012 Figure 13 Measured GD deviation of a fibre Bragg grating . 30 Figure 14 Measured phase ripple of a fibre Bragg grating 30 Figure 15 Measured GD for a device with random polarizat
32、ion mode coupling . 31 Figure 16 Measured CD for a device with random polarization mode coupling . 31 Figure A.1 Mueller states on Poincar sphere 32 Figure A.2 DGD spectrum for a 50 GHz bandpass filter, measured with 30 pm resolution BW . 35 Figure A.3 DGD versus wavelength for a random polarization
33、 mode coupling device (example) . 37 Figure A.4 DGD versus wavelength for a fibre Bragg grating filter (example) . 37 Table 1 Modulation frequency versus wavelength resolution for C-band . 17 Table A.1 Example of Mueller set . 33 61300-3-38 IEC:2012 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBR
34、E OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-38: Examinations and measurements Group delay, chromatic dispersion and phase ripple FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization com
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45、esponsible for identifying any or all such patent rights. International Standard IEC 61300-3-38 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components, of IEC technical committee 86: Fibre optics. The text of this standard is based on the following document
46、s: FDIS Report on voting 86B/3394/FDIS 86B/3438/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 6 61300-3-38 IEC:2012 The list
47、of all parts of IEC 61300 series, published under the general title, Fibre optic interconnecting devices and passive components Basic test and measurement procedures can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stabi
48、lity date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indic
49、ates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 61300-3-38 IEC:2012 7 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-38: Examinations and measurements Group delay, chromatic dispersion
