Bsi bs en 61753 143 2 2013

BS EN 61753-143-2:2013 BSI Standards Publication Fibre optic interconnecting devices and passive components — Performance standard Part 143-2: Optical passive VIPA-based dispersion compensator of single-mode fibre transmission for category C — Controlled environments NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW raising standards worldwide™ BRITISH STANDARD BS EN 61753-143-2:2013 National foreword This British Standard is the UK implementation of EN 61753-143-2:2013 It is identical to IEC 61753-143-2:2012 The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic interconnecting devices and passive components A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2013 Published by BSI Standards Limited 2013 ISBN 978 580 69514 ICS 33.180.20 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2013 Amendments issued since publication Amd No Date Text affected BS EN 61753-143-2:2013 EN 61753-143-2 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM February 2013 ICS 33.180.20 English version Fibre optic interconnecting devices and passive components Performance standard Part 143-2: Optical passive VIPA-based dispersion compensator of singlemode fibre transmission for category C Controlled environment (IEC 61753-143-2:2012) Dispositifs d'interconnexion et composants passifs fibres optiques Norme de performance Partie 143-2: Compensateur de dispersion reposant sur le VIPA passif optique de transmission par fibre unimodale pour la catégorie C Environnement contrôlé (CEI 61753-143-2:2012) Lichtwellenleiter Verbindungselemente und passive Bauteile - Betriebsverhalten Teil 143-2: VIPA-basierender passiver optischer Dispersionskompensator für Einmodenfaserübertragung für die Kategorie C Kontrollierte Umgebung (IEC 61753-143-2:2012) This European Standard was approved by CENELEC on 2012-12-20 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 61753-143-2:2013 E BS EN 61753-143-2:2013 EN 61753-143-2:2013 -2- Foreword The text of document 86B/3491/FDIS, future edition of IEC 61753-143-2, prepared by SC 86B, "Fibre optic interconnecting devices and passive components", of IEC TC 86, "Fibre optics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61753-143-2:2013 The following dates are fixed: • • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with the document have to be withdrawn (dop) 2013-09-20 (dow) 2015-12-20 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights Endorsement notice The text of the International Standard IEC 61753-143-2:2012 was approved by CENELEC as a European Standard without any modification In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 61978-1 NOTE Harmonized as EN 61978-1 -3- BS EN 61753-143-2:2013 EN 61753-143-2:2013 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies Publication Year Title EN/HD Year IEC 60793-1 Series Optical fibres Part 1: Measurement methods and test procedures EN 60793-1 Series IEC 60793-2-50 - EN 60793-2-50 - IEC 61300 Series Fibre optic interconnecting devices and passive components - Basic test and measurement procedures EN 61300 Series IEC 61300-2-1 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 2-1: Tests - Vibration (sinusoidal) EN 61300-2-1 - IEC 61300-2-4 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 2-4: Tests - Fibre/cable retention EN 61300-2-4 - IEC 61300-2-9 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 2-9: Tests - Shock EN 61300-2-9 - IEC 61300-2-17 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 2-17: Tests - Cold EN 61300-2-17 - IEC 61300-2-18 - Fibre optic interconnecting devices and EN 61300-2-18 passive components - Basic test and measurement procedures Part 2-18: Tests - Dry heat - High temperature endurance - IEC 61300-2-19 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 2-19: Tests - Damp heat (steady state) EN 61300-2-19 - IEC 61300-2-22 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 2-22: Tests - Change of temperature EN 61300-2-22 - Optical fibres Part 2-50: Product specifications - Sectional specification for class B single-mode fibres BS EN 61753-143-2:2013 EN 61753-143-2:2013 -4- IEC 61300-2-42 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 2-42: Tests - Static side load for connectors EN 61300-2-42 - IEC 61300-2-44 - Fibre optic interconnecting devices and EN 61300-2-44 passive components - Basic test and measurement procedures Part 2-44: Tests - Flexing of the strain relief of fibre optic devices - IEC 61300-3-2 - Fibre optic interconnecting devices and EN 61300-3-2 passive components - Basic test and measurement procedures Part 3-2: Examinations and measurements Polarization dependent loss in a single-mode fibre optic device - IEC 61300-3-4 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation EN 61300-3-4 - IEC 61300-3-7 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 3-7: Examinations and measurements Wavelength dependence of attenuation and return loss of single mode components EN 61300-3-7 - IEC 61300-3-32 - Fibre optic interconnecting devices and EN 61300-3-32 passive components - Basic test and measurement procedures Part 3-32: Examinations and measurements Polarisation mode dispersion measurement for passive optical components - IEC 61300-3-38 - Fibre optic interconnecting devices and EN 61300-3-38 passive components - Basic test and measurement procedures Part 3-38:Examinations and measurements Group delay, chromatic dispersion and phase ripple - IEC 61753-1 - Fibre optic interconnecting devices and EN 61753-1 passive components performance standard Part 1: General and guidance for performance standards - IEC 62074-1 - Fibre optic interconnecting devices and passive components - Fibre optic WDM devices Part 1: Generic specification - EN 62074-1 –2– BS EN 61753-143-2:2013 61753-143-2  IEC:2012 CONTENTS INTRODUCTION Scope Normative references Terms, definitions and abbreviations Test Test report Performance requirements 6.1 6.2 6.3 6.4 Annex A Reference components Dimensions Sample size Test details and requirements (normative) Sample size 17 Annex B (informative) Virtually imaged phased array (VIPA) Technology 18 Bibliography 20 Figure B.1 – Structure of virtually imaged phased array (VIPA) 18 Figure B.2 – Detailed light path and mechanism of generating chromatic dispersion 19 Table – Test and requirements for C-band and L-band WDM application 10 Table – Test and requirements for C-band WDM application 11 Table – Test and requirements for L-band WDM application 12 Table – Common test and requirements 13 Table A.1 – Sample size 17 BS EN 61753-143-2:2013 61753-143-2  IEC:2012 –5– INTRODUCTION The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed that compliance with this document may involve the use of a patent concerning the optical dispersion compensator given in Clauses to IEC takes no position concerning the evidence, validity and scope of this patent right The holder of this patent right has assured the IEC that he/she is willing to negotiate licences either free of charge or under reasonable and non-discriminatory terms and conditions with applicants throughout the world In this respect, the statement of the holder of this patent right is registered with IEC Information may be obtained from: Fujitsu Limited Standards Center, Intellectual property unit 1-1, Kamikodanaka 4-chome, Nakahara-ku, Kawasaki-shi, Kanagawa 211-8588 Japan Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights other than those identified above IEC shall not be held responsible for identifying any or all such patent rights IEC (http://patents.iec.ch) maintains on-line databases of patents relevant to their standards Users are encouraged to consult the databases for the most up to date information concerning patents –6– BS EN 61753-143-2:2013 61753-143-2  IEC:2012 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS – PERFORMANCE STANDARD – Part 143-2: Optical passive VIPA-based dispersion compensator of single-mode fibre transmission for category C – Controlled environment Scope This part of IEC 61753 contains the minimum test and measurement requirements and severity levels that a passive chromatic dispersion compensator (PCDC) using virtually imaged phased array (VIPA) must satisfy in order to be categorized as meeting the IEC standard, category C-controlled environments Generally, PCDCs are used to reduce the magnitude of chromatic dispersion (CD) between regenerators by adding CD to the span that has a sign opposite to the total CD of the fibre cable and components The requirements cover non-connectorized PCDCs used in single-channel transmission and wavelength division multiplexing (WDM) transmission in single-mode fibres (IEC 60793-2-50 B1/B2/B4) Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies IEC 60793-1 (all parts), Optical fibres – Measurement methods and test procedures IEC 60793-2-50, Optical fibres – Part 2-50: Product specifications – Sectional specification for class B single-mode fibres IEC 61300 (all parts), Fibre optic interconnecting devices and passive components – Basic test and measurement procedures IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-1: Tests – Vibration (sinusoidal) IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-4: Tests – Fibre/cable retention IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-9: Tests – Shock IEC 61300-2-17, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-17: Tests – Cold IEC 61300-2-18, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-18: Tests – Dry heat – High temperature endurance BS EN 61753-143-2:2013 61753-143-2  IEC:2012 –7– IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-19: Tests – Damp heat (steady state) IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-22: Tests – Change of temperature IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-42: Tests – Static side load for connectors IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic devices IEC 61300-3-2, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-2: Examination and measurements – Polarization dependent loss in a single-mode fibre optic device IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-4: Examinations and measurements – Attenuation IEC 61300-3-7, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-7: Examinations and measurements – Wavelength dependence of attenuation and return loss of single mode components IEC 61300-3-32, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-32: Examinations and measurements – Polarization mode dispersion measurement for passive optical components IEC 61300-3-38, 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 IEC 61753-1, Fibre optic interconnecting devices and passive components performance standard – Part 1: General and guidance for performance standards IEC 62074-1, Fibre optic interconnecting devices and passive components – Fibre optic WDM devices – Part 1: Generic specification Terms, definitions and abbreviations For the purposes of this document, the following terms, definitions and abbreviations apply 3.1 Terms and definitions 3.1.1 chromatic dispersion CD derivative of group delay with respect to wavelength or frequency Note to entry: A typical unit is ps/nm or ps/GHz The chromatic dispersion generally varies with the operating wavelength 3.1.2 polarization dependent loss PDL maximum variation of insertion loss due to a variation of the state of polarization (SOP) over all the SOPs BS EN 61753-143-2:2013 61753-143-2  IEC:2012 6.2 –9– Dimensions Dimensions shall comply with either an appropriate IEC interface standard or with those given in appropriate manufacturing drawings, where the IEC interface standard does not exist or cannot be used 6.3 Sample size Sample sizes for the tests are defined in Annex A 6.4 Test details and requirements The requirements are given only for dispersion compensator For connectorized components, the connector performances shall be in compliance with IEC 61753-1 Tables to give test details and requirements for these devices – 10 – BS EN 61753-143-2:2013 61753-143-2  IEC:2012 Table – Test and requirements for C-band and L-band WDM application No Tests Chromatic dispersion deviation Requirements Chromatic dispersion is specified for the operational wavelength range IEC 61300-3-38 Details The deviation of chromatic dispersion shall be determined as the worst case over the operational wavelength range 100 GHz spacing type |CD| < 500 ps/nm (FWHM; 50 GHz) |CD| < 200 ps/nm(FWHM; 40 GHz) 200 GHz spacing type |CD| < 400 ps/nm (FWHM; 60 GHz) The deviation of chromatic dispersion: ≤ % of the nominal chromatic dispersion value Insertion loss ≤ 9,5 dB IEC 61300-3-4 (not including the optical circulator) IEC 61300-3-7 PDL The insertion loss shall be determined as the worst case over the operational wavelength range ≤ 0,6 dB The PDL shall be determined as the worst case over all polarization states for the operation wavelength range ≤ 1,5 dB Fibre lengths of PCDC pigtail: ≥ 1,5 m PMD ≤ 0,8 ps |CD| < 500 ps/nm IEC 61300-3-32 ≤ 1,5 ps |CD| < 800 ps/nm The PMD shall be determined as the worst case over all polarization states for the operation wavelength range IEC 61300-3-2 Method Fibre lengths of PCDC pigtail: ≥ 1,5 m WDL IEC 61300-3-4 IEC 61300-3-7 CD is the nominal chromatic dispersion with a unit of ps/nm NOTE Operating wavelength range: C-band 530 nm to 565 nm, L-band 565 nm to 625 nm BS EN 61753-143-2:2013 61753-143-2  IEC:2012 – 11 – Table – Test and requirements for C-band WDM application No Tests Chromatic dispersion deviation Requirements Chromatic dispersion is specified for the operational wavelength range IEC 61300-3-38 Details The deviation of chromatic dispersion shall be determined as the worst case over the operational wavelength range 100 GHz spacing type |CD| < 500 ps/nm (FWHM; 50 GHz) |CD| < 200 ps/nm(FWHM; 40 GHz) 200 GHz spacing type |CD| < 400 ps/nm (FWHM; 60 GHz) The deviation of chromatic dispersion: ≤ % of the nominal chromatic dispersion value Insertion loss ≤ 9,5 dB IEC 61300-3-4 (not including the optical circulator) IEC 61300-3-7 PDL The insertion loss shall be determined as the worst case over the operational wavelength range ≤ 0,6 dB The PDL shall be determined as the worst case over all polarization states for the operation wavelength range ≤ 0,85 dB Fibre lengths of PCDC pigtail: ≥ 1,5 m PMD ≤ 0,8ps |CD| < 500 ps/nm IEC 61300-3-32 ≤ 1,5ps |CD| < 800 ps/nm The PMD shall be determined as the worst case over all polarization states for the operation wavelength range IEC 61300-3-2 Method Fibre lengths of PCDC pigtail: ≥ 1,5 m WDL IEC 61300-3-4 IEC 61300-3-7 CD is the nominal chromatic dispersion with a unit of ps/nm NOTE Operating wavelength range: C-band 530 nm to 565 nm – 12 – BS EN 61753-143-2:2013 61753-143-2  IEC:2012 Table – Test and requirements for L-band WDM application No Tests Chromatic dispersion deviation Requirements Chromatic dispersion is specified for the operational wavelength range IEC 61300-3-38 Details The deviation of chromatic dispersion shall be determined as the worst case over the operational wavelength range 100 GHz spacing type |CD| < 500 ps/nm (FWHM; 50 GHz) |CD| < 200 ps/nm(FWHM; 40 GHz) 200 GHz spacing type |CD| < 400 ps/nm (FWHM; 60 GHz) The deviation of chromatic dispersion: ≤ % of the nominal chromatic dispersion value Insertion loss ≤ 9,5 dB IEC 61300-3-4 (not including the optical circulator) IEC 61300-3-7 PDL The insertion loss shall be determined as the worst case over the operational wavelength range ≤ 0,6 dB The PDL shall be determined as the worst case over all polarization states for the operation wavelength range ≤ 0,85 dB Fibre lengths of PCDC pigtail: ≥ 1,5 m PMD ≤ 0,8ps |CD| < 500ps/nm IEC 61300-3-32 ≤ 1,5ps |CD| < 800ps/nm The PMD shall be determined as the worst case over all polarization states for the operation wavelength range IEC 61300-3-2 Method Fibre lengths of PCDC pigtail: ≥ 1,5 m WDL IEC 61300-3-4 IEC 61300-3-7 CD is the nominal chromatic dispersion with a unit of ps/nm NOTE Operating wavelength range: L-band 565 nm to 625 nm BS EN 61753-143-2:2013 61753-143-2  IEC:2012 – 13 – Table – Common test and requirements (1 of 4) No Tests Damp heat (steady state) IEC 61300-2-19 Requirements Details During the test the limits of test No and in Temperature: 40 ± °C Table 1, Table or Table shall be met + Moreover on completion of the test the Relative humidity: 93 32 % − insertion loss of the devices shall be within ± 0,5 dB of the original value at ambient Duration of exposure: 96 h conditions Specimens shall be optically functioning: Insertion loss shall be measured before, during (at a maximum interval of h) and after the test Chromatic dispersion shall be measured before and after the test Preconditioning procedure: Before the test, specimens shall be maintained at room temperature conditions for h Recovery procedure: After the test, specimens shall be maintained at room temperature conditions for h Change of temperature IEC 61300-2-22 During the test, the limits of test No and in High temperature: 60 ± °C Table 1, Table or Table shall be met Low temperature: – 10 ± °C Moreover on completion of the test the insertion loss of the devices shall be within Duration at extreme temperature: ± 0,5 dB of the original value at ambient 60 conditions Temperature rate of change: ≥ °C/min Number of cycles: Specimens shall be optically functioning: Insertion loss shall be measured before, during (at a maximum interval of 10 min) and after the test Chromatic dispersion shall be measured before and after the test Preconditioning procedure: Before test, specimens shall be maintained at room temperature conditions for h Recovery procedure: After test, specimens shall be maintained at room temperature conditions for h – 14 – BS EN 61753-143-2:2013 61753-143-2  IEC:2012 Table (2 of 4) No Tests High temperature endurance IEC 61300-2-18 Requirements During the test the limits of test No and in Table 1, Table or Table shall be met Moreover, on completion of the test the insertion loss of the devices shall be within ± 0,5 dB of the original value at ambient conditions Details High temperature: 60 ± °C Duration of exposure: 96 h Specimens shall be optically functioning: Insertion loss shall be measured before, during (at a maximum interval of 10 min) and after the test Chromatic dispersion shall be measured before and after the test Preconditioning procedure: Before test, specimens shall be maintained at room temperature conditions for h Recovery procedure: after test, specimens shall be maintained at room temperature conditions for h Cold IEC 61300-2-17 During the test the limits of test No and in Table 1, Table or Table shall be met Moreover on completion of the test the insertion loss of the devices shall be within ± 0,5 dB of the original value at ambient conditions Temperature: -10 ± °C Duration of exposure: 96 h Specimens shall be optically functioning: Insertion loss shall be measured before, during (at a maximum interval of 10 min) and after the test Chromatic dispersion shall be measured before and after the test Preconditioning procedure: Before test, specimens shall be maintained at room temperature conditions for h Recovery procedure: After test, specimens shall be maintained at room temperature conditions for h BS EN 61753-143-2:2013 61753-143-2  IEC:2012 – 15 – Table (3 of 4) No Tests Vibration (sinusoidal) IEC 61300-2-1 Requirements Details The limits of test No and in Table 1, Table Frequency range: 10 to 55 Hz or Table shall be met before and after the test Duration per axis: 20 On completion of the test the insertion loss of the devices shall be within ± 0,5 dB of the Number of axis: orthogonal original value Number of sweeps (10-55-10 Hz): 12 per axis Vibration amplitude: 1,52 mm (or max of 20 G) Specimens shall not be actively monitored during the test: Insertion loss and chromatic dispersion shall be measured before and after the test Shock IEC 61300-2-9 The limits of test No and in Table 1, Table or Table shall be met before and after the test On completion of the test the insertion loss of the devices shall be within ± 0,5 dB of the original value 50 g, axes, directions, shocks per direction 12 shocks total Nominal ms duration, half sine pulse Specimens shall not be actively monitored during the test Insertion loss and chromatic dispersion shall be measured before and after the test Fibre/cable retention (see Note 1) IEC 61300-2-4 The limits of test No and in Table 1, Table Magnitude and rate of application of the or Table shall be met The insertion loss of the tensile load: devices shall be within ± 0,5 dB of the original 10 N ± N at a speed of 0,5 N/s for value reinforced cable N ± 0,5 N at a speed of 0,5 N/s for buffered fibres Point of application of tensile load: 0,3 m from the end of the device Duration of the test (maintaining the load): 120 s at 10 N and 60 s at N Sampling rate: Insertion loss shall be measured at least once after the load has reached its maximum level and been maintained for a minimum period of 30 s Insertion loss shall be measured before, during and after the test, while chromatic dispersion shall be measured before and after the test – 16 – BS EN 61753-143-2:2013 61753-143-2  IEC:2012 Table (4 of 4) No Tests Static side load (see Notes and 2) IEC 61300-2-42 Requirements Details The limits of test No and in Table 1, Table Magnitude and duration of the tensile or Table shall be met The insertion loss of load: the devices shall be within ± 0,5 dB of the N for s for reinforced cable original value 2,3 N for s for buffered fibres Point of application of tensile load: 0,3 m from the end of the device and two mutually perpendicular directions as permitted by the product design Specimens shall not be actively monitored during the test: Insertion loss and chromatic dispersion shall be measured before and after the test Optical fibre cable flexing IEC 61300-2-44 The limits of test No and in Table 1, Table Magnitude of the tensile load: or Table shall be met The insertion loss of N for reinforced cable the devices shall be within ± 0,5 dB of the original value Cycle: ± 90 ° Number of cycles: 30 Specimens shall not be actively monitored during the test: Insertion loss and chromatic dispersion shall be measured before and after the test NOTE design These tests should be applicable to PCDCs which incorporate fibre or fibre cable pigtails in their product NOTE Static side load should be applied in two mutually perpendicular directions as permitted by the product design For example, a product with a base plate extending beyond the fibre exit may prohibit loading in that direction BS EN 61753-143-2:2013 61753-143-2  IEC:2012 – 17 – Annex A (normative) Sample size Table A.1 gives sample sizes Table A.1 – Sample sizes Item Test Sample size Source Chromatic dispersion deviation 12 New Insertion loss 12 Test PDL 12 Test WDL 12 Test PMD 12 Test Damp heat (steady state) Test Change of temperature Test High temperature endurance Test Cold Test 10 Vibration(sinusoidal) Test 11 Shock Test 12 Fibre/cable retention Test 13 Static side load Test 14 Optical fibre cable flexing Test BS EN 61753-143-2:2013 61753-143-2  IEC:2012 – 18 – Annex B (informative) Virtually imaged phased array (VIPA) technology Figure B.1 shows the structure of virtually imaged phased array (VIPA) The input light from a single-mode fibre is line-focused into a glass plate The glass plate is coated on both sides and collimated light is emitted from the reverse side of the glass after multiple reflections in the glass plate The light from the glass plate is focused onto a curved mirror The reflected light travels back to the glass plate and is finally coupled to the fibre Glass plate Collimating lens Shorter λ Dc> 3-dimensional mirror X-axis Optical circulator Line-focusing lens Focusing lens Longer λ Dc< IEC 2224/09 Figure B.1 – Structure of virtually imaged phased array (VIPA) Figure B.2 shows the detailed light path Each time the light is reflected at the right surface of the glass plate, several per cent of the power passes through the reflection coating This creates multiple beams which seem to diverge from the corresponding beam waist in the virtual image The interference of these diverging beams generates collimated light This collimated light travels at an angle which varies with the wavelength Chromatic dispersion, i.e the wavelength dependence of travelling distance, is decided by the wavelength dependence of the pointing angle of collimated light from the glass plate and the surface profile of the reflection mirror The convex mirror produces negative chromatic dispersion and the concave mirror produces positive chromatic dispersion Figure B.1 shows that the collimated light (grey line area on the surface of the 3-D mirror) reflects along the concave mirror surface, which produces positive chromatic dispersion By shifting the position of the 3-D mirror along the X-axis, the collimated light can also reflect along the convex mirror surface, which produces negative chromatic dispersion If the surface profile of the 3-D mirror is designed such that the curvature of the mirror surface is gradually changed along the X-axis, the chromatic dispersion can be easily changed by shifting of the 3-D mirror position along the X-axis BS EN 61753-143-2:2013 61753-143-2 © IEC:2012 – 19 – ff aa Focusing lenslens Focusing Shorter wavelength GlassPlate plate Glass Shorter wavelength 3-dimensional mirror 3-dimensional Mirror y y RR=100% = 100 % qq Centre beamwaist waist Center beam hh=dC(y)/dy = dC(y)/dy Incident Incident angleangle i i c(y) c(y) Input light Input light Line-focusing lens Line-focusing Longer wavelength Longer wavelength lens AR %) AR(R~0 (R~0%) R~98 % R~98% Middle wavelength Middle wavelength IEC 2115/12 Figure B.2 – Detailed light path and mechanism of generating chromatic dispersion – 20 – BS EN 61753-143-2:2013 61753-143-2  IEC:2012 Bibliography IEC 61978-1, Fibre optic interconnecting devices and passive components – Fibre optic passive chromatic dispersion compensators – Part 1: Generic specification ITU-T Supplement N.39, Optical system design and engineering considerations (10/2003) ITU-T Recommendation G.671, Transmission characteristics of optical components and subsystems _ This page deliberately left blank This page 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