1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2012 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS5675AEROSPACESTANDARDAS5675 Issued 2012-05 Characterization and Requirements for New Aerospac
5、e Fiber Optic Cable Assemblies -Jumpers, End Face Geometry, Link Loss Measurement, and InspectionRATIONALEAerospace end users have identified a need for beginning of life, fiber optic jumper, end face inspection and link loss measurement criteria for aerospace fiber optic cable harness assemblies.TA
6、BLE OF CONTENTS 1. GENERAL . 41.1 Purpose . 41.2 Scope 41.3 Cleaning 41.4 Applicable Documents 41.4.1 SAE Publications . 41.4.2 ANSI Publications . 41.4.3 ARINC Publications 41.4.4 IEC Publications 51.4.5 IPC-ASSOCIATION CONNECTING ELECTRONICS INDUSTRIES . 51.4.6 TIA Publications 51.4.7 U.S. Governm
7、ent Publications 51.4.8 Other Publications . 62. INSPECTION 62.1 Intent . 62.2 Apparatus 62.2.1 Hardware Classification 62.2.2 Validation/Verification Artifact . 62.3 Definition For Inspecting End Faces . 62.3.1 Zones 72.4 Definition of End Face Anomalies . 82.5 Inspection Procedure 83. INSERTION LO
8、SS / LINK LOSS TEST PROCEDURES . 93.1 Intent . 93.2 Required Equipment Conventional Insertion Loss testing . 93.2.1 Optical Power Meter (OPM) 93.2.2 Stabilized Light Source (SLS) . 93.2.3 Aerospace Measurement Quality Jumper (AMQJ) . 103.3 Launch Condition Requirements 103.3.1 Launch Condition Metho
9、ds . 10SAE AS5675 Page 2 of 59 3.4 AMQJ 103.4.1 AMQJ Maintenance and Verification 103.4.2 AMQJ Guided Probes . 113.4.3 Non-AMQJ Standalone Probes. 113.5 Measurements 123.5.1 Test Method 153.5.2 Assembly Link Loss (Attenuation) Measurements . 304. RETURN LOSS TEST PROCEDURES 464.1 Intent . 464.2 Meth
10、ods 464.3 Required Equipment . 464.4 Return Loss Measurements 475. OPTICAL CONNECTOR END FACE SPECIFICATIONS 485.1 Intent . 485.2 Objective . 485.3 End Face Geometry Measurement . 485.3.1 Importance of End Face Geometry . 485.3.2 Fiber Optic Connector End Face Geometry Measurement 495.3.3 Interferom
11、etric Microscope Types 515.3.4 Measurement Techniques and Methodologies . 515.3.5 Termini End Face Configurations . 535.3.6 Interferometry Type for Configurations . 545.4 End Face Geometry Specification 545.4.1 Key Parameter Definitions 545.4.2 Spherical Geometry Connector Requirement . 555.4.3 Flat
12、 Geometry Connector Requirement 58APPENDIX A INFORMATIVE REFERENCES 59FIGURE 1 VISUAL ACCEPTANCE CRITERIA FOR SINGLE MODE FIBER OPTIC END FACE 7FIGURE 2 VISUAL ACCEPTANCE CRITERIA FOR MULTI-MODE FIBER OPTIC END FACE 7FIGURE 3 DISPOSITION FLOW CHART 8FIGURE 4 EXAMPLE OF FIBER OPTIC AMQJ PROBE . 11FIG
13、URE 5 EXAMPLE OF FIBER OPTIC NON-AMQJ PROBE . 12FIGURE 6 CONFIGURATION 1 SETUP CONNECTOR IL OF SINGLE WAY CABLE ASSEMBLIES . 17FIGURE 7 CONFIGURATION 2 SETUP CONNECTOR IL OF SINGLE WAY CABLE ASSEMBLIES . 18FIGURE 8 CONFIGURATION 3 SETUP FOR INSERTION LOSS (IL) OF MULTI-CHANNEL CABLE ASSEMBLY . 19FIG
14、URE 9 CONFIGURATION 3 SETUP CONNECTOR IL OF MULTI-CHANNEL SIDE OFBREAKOUT ASSEMBLIES USING TEST PROBE CABLE . 21FIGURE 10 CONFIGURATION 4 SETUP CONNECTOR IL OF SINGLE-CHANNEL SIDES OFBREAKOUT ASSEMBLIES 23FIGURE 11 CONFIGURATION 5 SETUP CONNECTOR IL OF MULTI-CHANNEL ASSEMBLIES (UNLIKE CONNECTOR ENDS
15、) . 25FIGURE 12 CONFIGURATION 5 SETUP CONNECTOR IL OF MULTI-CHANNEL ASSEMBLIES USING TEST PROBE CABLE (UNLIKE CONNECTOR ENDS) 27FIGURE 13 CONFIGURATION 6 SETUP CONNECTOR IL OF MULTI-CHANNEL ASSEMBLIES (LIKE CONNECTOR ENDS) . 29FIGURE 14 CONFIGURATION 1 SETUP ASSEMBLY LINK LOSS OF SINGLE WAY CABLE AS
16、SEMBLY. 31FIGURE 15 CONFIGURATION 2 SETUP ASSEMBLY LINK LOSS OF SINGLE WAY CABLE ASSEMBLIESWITH UN-MATEABLE CONNECTORS . 32FIGURE 16 CONFIGURATION 3 SETUP ASSEMBLY LOSS OF BREAKOUT ASSEMBLY . 33FIGURE 17 CONFIGURATION 3 SETUP CONNECTOR LINK LOSS OF MULTI-CHANNEL ASSEMBLIESUSING TEST PROBE CABLE (UNL
17、IKE CONNECTOR ENDS) 35FIGURE 18 CONFIGURATION 3 SETUP ASSEMBLY LINK LOSS OF BREAKOUT ASSEMBLIES . 37SAE AS5675 Page 3 of 59 FIGURE 19 CONFIGURATION 3 SETUP CONNECTOR LINK LOSS OF MULTI-CHANNEL ASSEMBLIESUSING TEST PROBE CABLE (UNLIKE CONNECTOR ENDS) 39FIGURE 20 SETUP ASSEMBLY LINK LOSS OF MULTI-CHAN
18、NEL ASSEMBLIES (UNLIKE CONNECTORS) 41FIGURE 21 SETUP ASSEMBLY LINK LOSS OF MULTI-CHANNEL ASSEMBLIES (UNLIKE CONNECTORS) USING TEST PROBE CABLES 43FIGURE 22 SETUP LINK LOSS OF MULTI-CHANNEL ASSEMBLIES (UNLIKE CONNECTORS) . 45 FIGURE 23 SETUP: INSERTION LOSS / RETURN LOSS TEST SET . 46FIGURE 24 OPTICA
19、L PATH FOR INTERFEROMETER . 50FIGURE 25 WHITE LIGHT INTERFEROMETRY 51FIGURE 26 MEASUREMENT AREAS . 52FIGURE 27 SCHEMATIC OF KEY MEASUREMENT PARAMETERS 53FIGURE 28 TERMINI END FACE CONFIGURATIONS 54FIGURE 29 FIBER HEIGHT COORDINATE SYSTEM DEFINITION 55FIGURE 30 TYPICAL INTERFEROGRAM AND TOPOGRAPHICAL
20、 MAP OF SPHERICAL END FACE 56FIGURE 31 TYPICAL INTERFEROGRAM OF FLAT END FACE . 58FIGURE 32 EXAMPLE OF A VISUAL INSPECTION HIGH AND LOW RESOLUTION CALIBRATION ARTIFACT 59TABLE 1 INSPECTION ZONES FOR OPTICAL FIBER END FACES 7TABLE 2 ALLOWABLE DEFECTS FOR FIBER END FACES 9TABLE 3 CABLE INSERTION LOSS
21、ASSEMBLY CONFIGURATIONS . 13TABLE 4 CABLE LINK LOSS ASSEMBLY CONFIGURATIONS 14TABLE 5 INDUSTRY METHOD CROSS REFERENCE 14TABLE 6 RETURN LOSS INSTRUMENTS . 47TABLE 7 MEASUREMENT AREA DEFINITIONS . 52TABLE 8 PREFERRED MEASUREMENT TYPES 54TABLE 9 PC TERMINUS END FACE GEOMETRY REQUIREMENTS 56TABLE 10 APC
22、 TERMINUS END FACE GEOMETRY REQUIREMENTS 57TABLE 11 SPHERICAL NON-CONTACT TERMINUS END FACE GEOMETRY REQUIREMENTS . 57TABLE 12 FLAT NON-CONTACT TERMINUS END FACE GEOMETRY REQUIREMENTS 58SAE AS5675 Page 4 of 59 1. GENERAL 1.1 Purpose This document is intended to address inspection and testing of fibe
23、r optic cable assemblies at beginning of life (BOL). It is understood that the equipment described in this document is intended for use in a fabrication environment. The purpose is to develop aerospace fiber optic standards for quality and testing of; Jumpers, measurement quality, for aerospace test
24、ing (AMQJs) End face geometry, examination of termination quality Link Loss measurement definition Inspection, end face finish, acceptability, cleanliness 1.2 Scope To create a standard that instructs both supplier and user in the testing and characterization of initial build fiber optic cable assem
25、blies for avionics/aerospace applications. This can be in the plant or in the avionics “box.” It includes specification of jumpers (aerospace measurement quality jumpers), end faces, link loss requirements and inspection.1.3 Cleaning All optical end faces shall be cleaned prior to any processing, in
26、spection and testing. Contamination is the primary cause of link loss and can cause damage to an end face. For guidelines on cleaning, refer to IPC-8491-1. 1.4 Applicable Documents The following publications form a part of this document to the extent specified herein. The latest issue of SAE publica
27、tions shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, s
28、upersedes applicable laws and regulations unless a specific exemption has been obtained.1.4.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.ARP5061 Guidelines
29、for Testing and Support of Aerospace, Fiber Optic, Interconnect Systems 1.4.2 ANSI Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.ANSI Z136.4-2005 Recommended Practice for Laser Safety Measurements for
30、Hazard Evaluation1.4.3 ARINC Publications Available from ARINC, 2551 Riva Road, Annapolis, MD 21401. .ARINC 805 Fiber Optic Test Procedures SAE AS5675 Page 5 of 59 1.4.4 IEC Publications Available from International Electrotechnical Commission, 3, rue de Varembe, P.O. Box 131, 1211 Geneva 20, Switze
31、rland, Tel: +44-22-919-02-11, www.iec.ch.IEC 61280-4-1 Fibre-optic communication subsystem test procedures Part 4-1: Installed cable plant Multimode attenuation measurement 1.4.5 IPC-ASSOCIATION CONNECTING ELECTRONICS INDUSTRIES Available from IPC, 3000 Lakeside Drive, Bannockburn, IL 60015, Tel: 84
32、7-597-2862, www.ipc.org.IPC-8497-1 Cleaning Methods and Contamination Assessment for Optical Assembly 1.4.6 TIA Publications Available from Telecommunications Industry Association, 2500 Wilson Boulevard, Suite 300, Arlington, VA 22201, Tel: 703-907-7700, www.tiaonline.org/standards/.TIA/EIA-455 Fibe
33、r Optic Test Procedures TIA/EIA-455-8 (FOTP-8) Measurement of Splice or Connector Loss and Reflectance Using an OTDR (ANSI/TIA/EIA-455-8-2000)TIA/EIA-455-34 (FOTP-34) Interconnection Device Insertion Loss Test (ANSI/TIA/EIA-455-34A 95)TIA/EIA-455-43 (FOTP-43) Output Near-Field Radiation Pattern Meas
34、urement of Optical Waveguide Fibers (ANSI/TIA/EIA-455-43-A-99)TIA/EIA-455-47 (FOTP-47) Output Far-Field Radiation Pattern Measurement. (superseded by ANSI/TIA-455-177-B) TIA/EIA-455-107 (FOTP-107) Determination of Component Reflectance or Link/System ReturnLoss Using a Loss Test Set TIA/EIA-455-171
35、(FOTP-171) Attenuation by Substitution Measurement for Short-Length Multimode Graded-Index and Single-Mode Optical Fiber Cable Assemblies (ANSI/TIA/EIA-455-171-A) TIA/EIA-455-203 (FOTP-203) Launch Power Distribution Measurement TIA-526-7 (OFSTP-7) Measurement of Optical Power Loss of Installed Singl
36、e-Mode Fiber Cable PlantTIA-526-14 (OFSTP-14) Optical Power Loss Measurement of Installed Multimode Fiber Cable PlantTIA/EIA Standard 604-5 (FOCIS 5) FIBER OPTIC CONNECTOR INTERMATEABILITY STANDARD - Type MPO TIA/EIA-TSB-142 Optical Return Loss Meters Measurement and Application Issues TIA/EIA TSB-1
37、78 Launch conditions 1.4.7 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-9495, https:/assist.daps.dla.mil/quicksearch/.MIL-DTL-38999 General Specification for Connectors, E
38、lectrical, Circular, Miniature, High Density, Quick Disconnect (Bayonet, Threaded, and Breech Coupling), Environment, Removable Crimp and Hermetic Solder ContactsMIL-PRF-64266 Connectors, Fiber Optic, Circular, Plug and Receptacle Style, Multiple Removable Genderless Termini, Environment Resisting,
39、General Specification for SAE AS5675 Page 6 of 59 MIL-PRF-29504 Termini, Fiber Optic Connector, Removable, General Specification For1.4.8 Other Publications Telcordia GR-326-CORE Generic Requirements for Single-mode Optical Connectors and Jumper Assemblies 2. INSPECTION 2.1 Intent This section defin
40、es the requirements and methods for inspecting terminated fiber optic cable end faces in aerospace termini/connectors. Procedures are given for the inspection process itself. Thresholds are provided for grading an end face and determining acceptance. Generally, this section applies to fibers that ar
41、e terminated in a ferrule. However this section may apply to un-terminated polished fibers. 2.2 Apparatus 2.2.1 Hardware Classification There are two types of inspection relevant to fiber optic manufacture and deployment.2.2.1.1 Low Resolution: A low resolution video or optical microscope shall be u
42、sed to examine the fiber and ferrule end face prior to mating and test to ensure that the surface is polished and clean. Typical magnification is 100X. Intended for initial viewing of terminus to look for defects over the entirety of the ferrule and endface. 2.2.1.2 High Resolution: At the beginning
43、 of life, following initial polishing, a high resolution video or optical microscope shall be used to examine the optical fiber surface or end face for fine scratches and other defects. Recommended magnifications are 200X for multimode and 400X for single mode. 2.2.2 Validation/Verification Artifact
44、 Microscopes shall be validated using a NIST traceable artifact. The artifact shall be capable of validating that the microscopes magnification, resolution, and contrast rendering abilities are sufficient for the application. As optical performance can degrade over time, this calibration test must b
45、e performed periodically, at 6 month to 12 month intervals. 2.2.2.1 Low Resolution Artifact(s) shall be able to validate a 2.0 micron ( m) feature in a 500 micron diameter field of view. For examples, see Informative References section I-3 Artifacts. 2.2.2.2 High Resolution Artifact(s) shall be able
46、 to validate the following: System is able to validate a feature of 1 micron. This artifact scratch must be manufactured in accordance with NIST traceable guidelines. System can view or scan a region of interest of at least 125 microns.Factors such as contamination within the optics, video adjustmen
47、ts on the monitor, and degradation of electrical components can affect the inspection systems performance. Maintenance and calibration shall be per inspection equipment manufacturers recommendations. 2.3 Definition For Inspecting End Faces WARNING: Photonic systems may emit optical power that is dam
48、aging to the human eye. Ensure that that the system is powered-down prior to inspection. Follow the equipment manufacturers operating procedures and warnings. Follow safety guidelines of ANSI Z136.4-2005. SAE AS5675 Page 7 of 59 2.3.1 Zones Defects on fiber optic end faces become likely to degrade s
49、ignal performance when they are located near the mode field (core). For that reason, acceptance criteria are defined in “zones”. Those zones are concentric rings centered on the core of the fiber. The acceptance criteria become less stringent the further the zone is from the core. The dimensions of the zones are calculated as follows and are specifically given in Figures 1 and 2. FIGURE 1 - VISU
