Organisation : NRF (National Research Foundation) Facility : SARAO (South African Radio Astronomy Observatory) Project : HERA (Hydrogen Epoch of Reionization Array) Document Type : PRD (Product Requirements Document) HERA RETICULATION FIBRE CABLE PRODUCT REQUIREMENTS Document Number... Revision... 1 Classification... Commercial in Confidence Prepared by... K A Rosie Date... 2018-07-05
DOCUMENT APPROVAL Name Designation Affiliation Signature/Date Prepared by K Rosie HERA Project Engineer SARAO Reviewed by M Padayachee Fibre Technician SARAO Accepted by R Julie Fibre Engineer SARAO Approved by Z Halday HERA Project Manager SARAO Kathryn Rosie (Jul 5, 2018) Manny Padayachee Manny Padayachee (Jul 5, 2018) Roufurd Julie Roufurd Julie (Jul 5, 2018) Ziyaad Halday Ziyaad Halday (Jul 5, 2018) DOCUMENT HISTORY Revision Date of Issue Prepared by Comments (e.g. ECN Number or changes to document) A 2018-06-06 K A Rosie Released for comment B 2018-06-28 K A Rosie Released after comments 1 2018-07-05 K A Rosie First issue DOCUMENT SOFTWARE Package Version Filename Word Processor MsWord Word 2010 Rev 1 - HERA Reticulation Fibre Cable Product Requirements.docx Block Diagrams Visio Visio 2010 None Other None Name Registered Address ORGANISATION DETAILS SARAO, Cape Town Office (Pinelands, Western Cape) 3rd Floor, The Park, Park Road, Pinelands, 7405, South Africa SARAO, Johannesburg Office (Rosebank, Gauteng) 1st Floor, 17 Baker Street Rosebank, Gauteng 2196, South Africa Telephone +27 (0) 21 506 7300 +27 (0) 11 268 3400 Fax. +27 (0) 21 506 7375 +27 (0) 11 442 2454 Website www.sarao.ac.za www.sarao.ac.za 2018-07-05 Commercial in Confidence Page 2 of 18
TABLE OF CONTENTS 1 INTRODUCTION... 6 1.1 Background... 6 1.2 Purpose... 6 1.3 Identification... 6 2 REFERENCES... 7 2.1 Applicable Documents... 7 2.2 Reference Documents... 7 3 FIBRE REQUIREMENTS... 7 3.1 Optical Fibre Characteristics... 7 3.1.1 Fibre Type... 7 3.1.2 Attenuation... 7 3.1.3 Mode Field Diameter... 7 3.1.4 Cladding Diameter... 8 3.1.5 Cladding Non-Circularity... 8 3.1.6 Core Concentricity... 8 3.1.7 Cutoff Wavelength... 8 3.1.8 Chromatic Dispersion... 8 3.1.9 Polarisation Mode Dispersion... 8 3.1.10 Proof Stress... 9 3.1.11 Fibre Continuity... 9 3.1.12 Material Properties... 9 3.2 Cable Construction... 9 3.2.1 Fibre Cable Construction Type... 9 3.2.2 Fibre Tubes... 9 3.2.3 Ripcord... 9 3.2.4 Cable Sheath... 9 3.2.5 Cable Marking... 9 3.2.6 Cable Strength Member... 10 3.2.7 Cable Diameter... 10 3.2.8 Tube Colour Code... 10 3.2.9 Cable Material... 10 3.2.10 Filling Compound... 10 3.3 Mechanical Performance Requirements... 11 2018-07-05 Commercial in Confidence Page 3 of 18
3.3.1 Compression Strength... 11 3.3.2 Bend Radius... 11 3.3.3 Repeated Bending... 11 3.3.4 Torsion Test... 11 3.3.5 Tensile Strength... 11 3.3.6 Water Penetration... 11 3.4 Environmental Requirements... 11 3.4.1 Temperature Cycling... 12 3.4.2 Humidity... 12 4 DELIVERY REQUIREMENTS... 12 4.1 Packaging... 12 4.2 Cable Drum Marking... 12 4.3 Sealing of Cable Ends... 12 4.4 Certificate of Conformance... 12 4.5 Test Results... 12 5 QUALITY ASSURANCE... 13 5.1 Quality Management System... 13 5.2 Inspection Equipment... 13 6 COMPLIANCE MATRIX... 14 LIST OF FIGURES None. LIST OF TABLES Table 1: Compliance Matrix... 14 2018-07-05 Commercial in Confidence Page 4 of 18
ABBREVIATIONS CD... Chromatic Dispersion HERA... Hydrogen Epoch of Reionization Array MFD... Mode Field Diameter OTDR... Optical Time Domain Reflectometer SARAO... South African Radio Astronomy Observatory SKA... Square Kilometre Array 2018-07-05 Commercial in Confidence Page 5 of 18
1 INTRODUCTION 1.1 BACKGROUND The HERA telescope requires fibre cables to be installed between its correlator container and various nodes distributed within the array. 1.2 PURPOSE This document specifies the product performance, mechanical and environmental requirements for the fibre cable that is required for the HERA network. 1.3 IDENTIFICATION The fibre cable is identified as H0040-2100 in the HERA Product Breakdown Structure [RD1]. 2018-07-05 Commercial in Confidence Page 6 of 18
2 REFERENCES 2.1 APPLICABLE DOCUMENTS The following documents are applicable to the extent stated herein. In the event of conflict between the contents of the applicable documents and this document, the applicable documents shall take precedence. [AD1] IEC 60974-1-2:2017 Optical fibre cables - Part 1-2: Generic specification - Basic optical cable test procedures - General guidance 2.2 REFERENCE DOCUMENTS The following documents are referenced in this document. In the event of conflict between the contents of the referenced documents and this document, this document shall take precedence. [RD1] H0000-0000-001 HERA Product Breakdown Structure Rev C 3 FIBRE REQUIREMENTS [R1] The performance specifications as specified in this section shall be met or exceeded on delivery of the cable to the client. The supplier shall ensure adequate margin for possible changes in performance during the stages of procurement of bare fibre, production into cable, and transport. 3.1 OPTICAL FIBRE CHARACTERISTICS 3.1.1 Fibre Type [R2] The fibre type shall be ITU-T G.657.A1 compliant. 3.1.2 Attenuation [R3] The SUPPLIER shall ensure that the attenuation is measured using the cut-back method as specified in ITU-T Rec. G.650.1 (07/2010). [R4] The attenuation at 1310 nm wavelength for each individual fibre shall be less than or equal to 0.35 db/km. [R5] The attenuation at 1550 nm wavelength for each individual fibre shall be less than or equal to 0.21 db/km. 3.1.3 Mode Field Diameter [R6] The nominal value of the mode field diameter (MFD) at 1310 nm shall be between 8.6 µm and 9.5 µm for all G.657.A1 fibres, and for each fibre, the MFD shall not exceed the tolerance of ±0.4 µm around the nominal value. 2018-07-05 Commercial in Confidence Page 7 of 18
[R7] The nominal value of the MFD at 1550 nm shall be between 9.0 µm and 10.5 µm for all G.657.A1 fibres, and for each fibre, the MFD shall not exceed the tolerance of ±0.5 µm around the nominal value. 3.1.4 Cladding Diameter [R8] The nominal value of the cladding diameter for each fibre shall be 125 µm and shall not exceed the tolerance of ±0.7 µm. 3.1.5 Cladding Non-Circularity [R9] The cladding non-circularity for each fibre shall not exceed 1%. 3.1.6 Core Concentricity [R10] The core concentricity error for each fibre shall not exceed 0.5 µm. 3.1.7 Cutoff Wavelength [R11] The cut-off wavelength for each fibre shall be within the range 1100 to 1260 nm, measured in accordance with the transmitted power technique method as described in the ITU-T Rec. 650.1 (07/2010). [R12] The maximum cable cut-off wavelength of a cabled single mode fibre shall not exceed 1260 nm. 3.1.8 Chromatic Dispersion [R13] The CD shall be determined by measuring the group delay in the time domain as described in ITU-T Rec. G.650.1 (07/2010). [R14] The CD for each individual fibre shall be less than: +3.3 ps/(km.nm) and greater than -5.90 ps/(km.nm) over the wavelength range of 1264 to 1337 nm. [R15] The maximum value of the CD shall not exceed 18 ps/(km.nm) at the wavelength 1550 nm. [R16] The supplier shall indicate the Zero Dispersion Wavelength (λ0). [R17] The supplier shall indicate the Zero Dispersion Slope (S0) at λ0. 3.1.9 Polarisation Mode Dispersion [R18] The maximum Polarisation Mode Dispersion (link design value) for each individual fibre shall not exceed 0.08 ps/ km. [R19] The maximum individual fibre Polarisation Mode Dispersion value for each individual fibre shall not exceed 0.10 ps/ km. 2018-07-05 Commercial in Confidence Page 8 of 18
3.1.10 Proof Stress [R20] The proof stress shall be greater than or equal to 0.69 GPa as measured in accordance with ITU- T Rec. G.650.1 (07/2010). 3.1.11 Fibre Continuity [R21] The bare fibre inside the cable shall be one continuous length and shall not contain any midspan splice connections. 3.1.12 Material Properties [R22] The fibre shall be made from high grade silica, compound silica glasses, or equivalent material. [R23] The primary coating shall be made from UV curable acrylate, UV curable urethane, epoxy acrylate or equivalent material. [R24] The primary coating shall be removable without the use of chemicals. 3.2 CABLE CONSTRUCTION 3.2.1 Fibre Cable Construction Type [R25] The fibre cable shall be an all-dielectric 12 core fibre cable of loose tube construction, suitable for microduct installation (pulling). 3.2.2 Fibre Tubes [R26] The primary coated fibres shall be contained in tubes. [R27] Each fibre tube shall contain six (6) optical fibres. [R28] The fibre shall contain two (2) tubes. [R29] The tube shall be readily removable for splicing purposes. 3.2.3 Ripcord [R30] The fibre cable shall provide a means to remove the cladding. This can be either by means of a ripcord or rip yarn. 3.2.4 Cable Sheath [R31] The fibre cable sheath shall be made from High Density Polyethylene. 3.2.5 Cable Marking [R32] The fibre cable shall be marked at 1m intervals with the following information: [R32.1] Client name: SARAO / HERA [R32.2] Manufacturer name 2018-07-05 Commercial in Confidence Page 9 of 18
[R32.3] Fibre count [R32.4] Fibre type [R32.5] Year of manufacture [R32.6] The part number: H0040-2100 [R32.7] Length marking 3.2.6 Cable Strength Member [R33] The cable shall have a central strength member made from reinforced plastic or fibre reinforced plastic. [R34] The tubes shall be arranged around the central strength member, along with sufficient fillers to maintain mechanical properties. 3.2.7 Cable Diameter [R35] The cable shall have a maximum diameter of less than 6mm throughout its entire length. 3.2.8 Tube Colour Code [R36] Each tube shall be of a different colour. [R37] Fillers shall all be the same colour, which shall be a different colour to any tube colour. 3.2.9 Cable Material [R38] No metallic materials are permitted in any part of the cable construction or that of its contents. 3.2.10 Filling Compound [R39] The tubes shall be filled with a water blocking compound. [R40] The compound shall be: [R40.1] Free from dirt, metallic particles and other foreign materials and shall not obscure the colour identification of the fibres. [R40.2] Non-toxic, free from unpleasant odour and shall be dermatologically safe [R40.3] Thixotropic, and shall neither freeze nor drip at installation or operating temperatures. [R40.4] Easily removed from the fibres by wiping, without leaving a residue which may hinder splicing. 2018-07-05 Commercial in Confidence Page 10 of 18
3.3 MECHANICAL PERFORMANCE REQUIREMENTS 3.3.1 Compression Strength [R41] A Compression Strength test shall be performed on all supplied cables as specified in IEC-60794-1-2 method E3 [AD1]. [R42] There shall be no visible damage to the cable after the test. 3.3.2 Bend Radius [R43] A Bend Radius test shall be performed on all cables supplied as specified in IEC-60794-1-2 method E11 [AD1]. [R44] There shall be no visible damage to the cable after the test. 3.3.3 Repeated Bending [R45] A Repeated Bending test shall be performed on all cables supplied as specified in IEC-60794-1-2 method E6 [AD1]. [R46] There shall be no visible damage to the cable after the test. 3.3.4 Torsion Test [R47] A Torsion test shall be performed on all cables supplied as specified in IEC-60794-1-2 method E7 [AD1]. [R48] There shall be no visible damage to the cable after the test. 3.3.5 Tensile Strength [R49] A Tensile Strength test shall be performed on all cables supplied as specified in IEC-60794-1-2 method E1 [AD1]. [R50] There shall be no visible damage to the cable after the test. 3.3.6 Water Penetration [R51] A Water Penetration test shall be performed on all cables supplied as specified in IEC-60794-1-2 method F5 [AD1]. [R52] There shall be no visible damage to the cable after the test. 3.4 ENVIRONMENTAL REQUIREMENTS [R53] The cable shall retain its optical and mechanical properties as described in this document in the case of exposure to the following environmental conditions. 2018-07-05 Commercial in Confidence Page 11 of 18
3.4.1 Temperature Cycling [R53.1] Transport and storage: -10 to +70 degrees Celsius [R53.2] Laying and installation: -5 to +50 degrees Celsius [R53.3] Operation: -10 to +40 degrees Celsius 3.4.2 Humidity [R53.4] All stages: 0 to 100% 4 DELIVERY REQUIREMENTS 4.1 PACKAGING [R54] The fibre cable shall be supplied on a suitable cable drum with a barrel diameter greater or equal to 40 times the diameter of the fibre cable. [R55] The cable drum shall be constructed in such a way to prevent damage to the fibre cable during shipment and handling. 4.2 CABLE DRUM MARKING [R56] The cable drum shall be marked with the following information: [R56.1] SARAO / HERA [R56.2] Arrow showing the direction in which the drum shall be unrolled [R56.3] Country of origin [R56.4] Label: CAUTION OPTICAL FIBRE CABLE DO NOT LAY FLAT [R56.5] Manufacturer name 4.3 SEALING OF CABLE ENDS [R57] The ends of the fibre cable shall be sealed with heat shrinkable endcaps. 4.4 CERTIFICATE OF CONFORMANCE [R58] The fibre cable shall be supplied with a certificate of conformance. 4.5 TEST RESULTS [R59] The fibre cable drum shall be supplied with an OTDR trace of each individual fibre completed at a wavelength of 1310nm and 1550nm. 2018-07-05 Commercial in Confidence Page 12 of 18
5 QUALITY ASSURANCE 5.1 QUALITY MANAGEMENT SYSTEM [R60] The fibre cable manufacturer shall be ISO9001:2008 certified. 5.2 INSPECTION EQUIPMENT [R61] The supplier shall have access to sufficient inspection equipment such that the parameters specified herein can be checked and recorded. The facilities may be audited by SARAO representatives to confirm suitability. [R62] All test equipment used shall be within a valid calibration period. 2018-07-05 Commercial in Confidence Page 13 of 18
6 COMPLIANCE MATRIX Bidders are required to complete the following table and return it with their bid. Comply / Partly Comply / Non-compliance shall be indicated in the relevant column and documentation which supports this needs to be provided. Please note that if no supporting documentation is provided, the paragraph will be marked Non-compliance. Table 1: Compliance Matrix Req No. Description Comply / Partly Comply / Non-compliance Supporting Documentation [R1] [R2] [R3] [R4] [R5] [R6] [R7] [R8] [R9] [R10] [R11] Requirements for all stages Fibre type Attenuation measurement method Attenuation 1310 nm Attenuation 1550 nm Mode field diameter 1310 nm Mode field diameter 1550 nm Cladding diameter Cladding non-circularity Core concentricity Cutoff wavelength range 2018-07-05 Commercial in Confidence Page 14 of 18
Req No. Description Comply / Partly Comply / Non-compliance Supporting Documentation [R12] [R13] [R14] [R15] [R16] [R17] [R18] [R19] [R20] [R21] [R22] [R23] [R24] [R25] [R26] Cutoff wavelength maximum Chromatic dispersion measurement method Chromatic dispersion range Chromatic dispersion limit Zero dispersion wavelength Zero dispersion slope Polarisation mode dispersion Polarisation mode dispersion Proof stress Fibre continuity Fibre material Primary coating Primary coating removal Fibre cable construction type Fibre tubes 2018-07-05 Commercial in Confidence Page 15 of 18
Req No. Description Comply / Partly Comply / Non-compliance Supporting Documentation [R27] [R28] [R29] [R30] [R31] [R32] [R33] [R34] [R35] [R36] [R37] [R38] [R39] [R40] [R41] Number of fibres in tube Number of tubes in cable Tube removal Ripcord Cable sheath Cable marking Central strength member Tube arrangement Cable diameter Tube colours Filler colour Cable material Filler compound Filler compound properties Compression strength test 2018-07-05 Commercial in Confidence Page 16 of 18
Req No. Description Comply / Partly Comply / Non-compliance Supporting Documentation [R42] [R43] [R44] [R45] [R46] [R47] [R48] [R49] [R50] [R51] [R52] [R53] [R54] [R55] [R56] Cable damage Bend radius test Cable damage Repeated bending Cable damage Torsion test Cable damage Tensile strength Cable damage Water penetration Cable damage Environmental requirements Cable drum diameter Cable drum construction Cable drum marking 2018-07-05 Commercial in Confidence Page 17 of 18
Req No. Description Comply / Partly Comply / Non-compliance Supporting Documentation [R57] [R58] [R59] [R60] [R61] [R62] Cable endcaps Fibre COC at delivery Fibre test results at delivery Supplier QMS Supplier access to equipment Supplier test equipment calibration 2018-07-05 Commercial in Confidence Page 18 of 18
Rev 1 - HERA Reticulation Fibre Cable Product Requirements Adobe Sign Document History 07/05/2018 Created: 07/05/2018 By: Status: Transaction ID: Ziyaad Halday (zhalday@ska.ac.za) Signed CBJCHBCAABAASvoMXds2DfB0Jx_hTe4sVLkuiJ6xaJG5 " Rev 1 - HERA Reticulation Fibre Cable Pro duct Requirements" History Document created by Ziyaad Halday (zhalday@ska.ac.za) 07/05/2018-2:30:44 AM PDT- IP address: 196.24.41.254 Document emailed to Kathryn Rosie (krosie@ska.ac.za) for signature 07/05/2018-2:32:02 AM PDT Document viewed by Kathryn Rosie (krosie@ska.ac.za) 07/05/2018-2:32:26 AM PDT- IP address: 66.249.93.206 Document e-signed by Kathryn Rosie (krosie@ska.ac.za) Signature Date: 07/05/2018-2:32:37 AM PDT - Time Source: server- IP address: 196.24.41.254 Document emailed to Manny Padayachee (manny@ska.ac.za) for signature 07/05/2018-2:32:38 AM PDT Document viewed by Manny Padayachee (manny@ska.ac.za) 07/05/2018-3:13:22 AM PDT- IP address: 66.249.93.210 Document e-signed by Manny Padayachee (manny@ska.ac.za) Signature Date: 07/05/2018-3:17:08 AM PDT - Time Source: server- IP address: 196.24.39.242 Document emailed to Roufurd Julie (rjulie@ska.ac.za) for signature 07/05/2018-3:17:09 AM PDT Document viewed by Roufurd Julie (rjulie@ska.ac.za) 07/05/2018-3:25:06 AM PDT- IP address: 66.249.93.210 Document e-signed by Roufurd Julie (rjulie@ska.ac.za) Signature Date: 07/05/2018-3:27:22 AM PDT - Time Source: server- IP address: 196.24.41.254
Document emailed to Ziyaad Halday (zhalday@ska.ac.za) for signature 07/05/2018-3:27:23 AM PDT Document viewed by Ziyaad Halday (zhalday@ska.ac.za) 07/05/2018-3:30:03 AM PDT- IP address: 66.249.93.208 Document e-signed by Ziyaad Halday (zhalday@ska.ac.za) Signature Date: 07/05/2018-3:30:15 AM PDT - Time Source: server- IP address: 196.24.39.242 Signed document emailed to Kathryn Rosie (krosie@ska.ac.za), Manny Padayachee (manny@ska.ac.za), Roufurd Julie (rjulie@ska.ac.za), and Ziyaad Halday (zhalday@ska.ac.za) 07/05/2018-3:30:15 AM PDT