BS EN 4533-002-2006 航空航天系列.纤维光学系统.手册.试验和测量

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标准号:BS EN 4533-002-2006
中文标准名称:航空航天系列.纤维光学系统.手册.试验和测量
英文标准名称:Aerospace series - Fibre optic systems - Handbook - Test and measurement
标准类型:V25
发布日期:2006/11/30 12:00:00
实施日期:2006/11/30 12:00:00
中国标准分类号:V25
国际标准分类号:49.060
引用标准:EN 4533-004;ARP5061
适用范围:Insertion loss is the most frequent measurement performed on a fibre optic link. The avionic system designerwill want to know or predict the insertion loss of a link to determine its performance. Aircraft manufacturers willwant to measure the insertion loss of harness components during assembly and before it is delivered to thecustomer to highlight faults and to provide a record of the performance of the harness at the beginning of itslifetime (footprinting). The insertion loss will be measured at intervals during the lifetime of the aircraft todiscover or identify faults and any gradual degradation in performance of the harness.There is, however, one problem. It is difficult to collect reliable and consistent measurements of the insertionloss on any multi-mode fibre optic harness where the distance between components is relatively small (lessthan 100 metres). The reason is that the insertion loss of a component or a harness depends on the powerdistribution of the light injected into it. This leads to very large differences in the measured value of theinsertion loss [1] depending on the power distribution of the source used to make the measurement.This Part of EN 4533 will explain the measurement problem and the techniques used to overcome them ingreater detail.

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