【英文标准名称】:Fibreopticwavelengthswitches.Genericspecification
【原文标准名称】:光纤波长开关.通用规范
【标准号】:BSEN62099-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-09-13
【实施或试行日期】:2001-09-13
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:认可;组装件;组件;连接工艺;定义(术语);设计;尺寸选定;电气工程;电子设备及元件;纤维光学;纤维;检验;作标记;光波导;无源的;质量;质量保证;规范(验收);开关;测试;类型;波长
【英文主题词】:Approval;Assemblies;Components;Connectiontechnology;Definitions;Design;Dimensioning;Electricalengineering;Electronicequipmentandcomponents;Fibreoptics;Fibres;Inspection;Marking;Opticalwaveguides;Passive;Quality;Qualityassurance;Specification(approval);Switches;Testing;Types;Wavelengths
【摘要】:ThisInternationalStandardappliestofibreopticwavelengthswitches.Theterm"fibreopticwavelengthswitch"canbeusedtodescribeawiderangeofdevices,assembliesandsystemsbothactiveandpassive.Therefore,itisnecessarytoelaborateonthescopeandobjectofthisstandard.Thisspecificationisintendedtocoverthosedevicesandassemblieswhichhavethefollowingattributes.-Whiletheswitchactuationmeansisbynecessityactive,theopticalpathsthroughtheswitcharepassive.Thus,neitheropticalamplificationnoropto-electronicconversionisencompassed.-Theswitchfunctionisrestrictedtotheroutingoflightratherthanintentionalpowerdivisionplusrouting.Thus,signalbroadcastfunctionsarenotencompassed.-Theyhavetwoormoreportsforthetransmissionofopticalpowerandhavetwoormorestatesinwhichpowermayberoutedorblockedbetweentheseports.-Theportsareopticalfibresoropticalfibreconnectors.Wavelengthswitchingnormallyinvolvesseparationoftheindividualwavelengthstreamsoflightwhicharere-routedandthenrecombined.Thus,wavelengthswitchesmayinvolvemultipleopticaljunctionsandmultiple-stageswitchinglayoutsinteriortotheswitch.However,thespecificationsrelatetotheopticalperformancefromporttoportoftheoverallassembly.Systemcontrolandmonitoringwiththeirrelatedelectronicsandsoftwarearenotcoveredbythisspecification.Theswitchassemblymayhaveopticalmeanstofacilitatesuchfunctionality(suchasopticaltapsorwavelengthmonitoringmeans),butanyrelateddegradationinswitchperformanceshouldbecoveredbytheoverallswitchspecifications.Thisspecificationdealswithswitchesthatincorporatepassiveopticalpaths,and,therefore,itmaybeassumedthatthesignalperformance,otherthanthroughattenuation,isindependentofthesignalformat.However,particularlyinthecaseofwavelengthswitching,sometechnologiesforswitchingandforwavelengthdiscriminationmayhaveaninfluenceonthesignalsbeingcarriedonthechannels.Somefactorsthatmustbeconsideredare:spatialcrosstalk,crosstalkinthewavelengthdomain,andpolarizationeffects.Thisstandardestablishesuniformrequirementsforthefollowingpoints:-fibreopticwavelengthswitchrequirements;-qualityassessmentprocedures.
【中国标准分类号】:M33
【国际标准分类号】:33_180_20
【页数】:36P.;A4
【正文语种】:英语


【英文标准名称】:Airquality.Determinationoftheasbestosfiberconcentrationbytransmissionelectronmicroscopy.Indirectmethod.
【原文标准名称】:空气质量.用电子显微镜传送法测定石棉纤维的密度.间接法
【标准号】:NFX43-050-1996
【标准状态】:现行
【国别】:法国
【发布日期】:1996-01-01
【实施或试行日期】:1996-01-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:含量测定;空气污染;石棉粉;环境空气;石棉;空气质量;显微分析
【英文主题词】:Airpollution;Airquality;Ambientair;Asbestos;Asbestosdust;Determinationofcontent;Microscopicanalysis
【摘要】:
【中国标准分类号】:Z50
【国际标准分类号】:13_040_20
【页数】:42P;A4
【正文语种】:其他