1、光纖課程,內容,光纖的規格 光纖的模態 光纖的種類 光纖的波長 光纖的衰減 光纖的頻寬 光纖的張力,光纖的半施工半徑 光纖的耐溫 運用範圍 光纖的接頭 光纖的製作方式 光纖的終端設備 測試及相關器材,光纖結構,光纖剖面分析,Calulate Loss Limit,Link Attenuation = Cable Attn + Connector Attn + Splice AttnCable Attn = 3.75Connector Attn = 2 * 0.75 dB= 1.5 dBSplice Attn = 0 Link Attn = 3.75 db + 1.5 dB = 5.25 dB,
2、連接衰減計算方法,Cable Attn (dB) = Attn Coefficient (dB/km) * Length (Km)where Attn Coeffficient is:3.75 dB/km 850 nm for multi-mode31.5 dB/km 1300 nm for multi-mode0.5 dB/km 1310 nm for single-mode outside plant cable0.5 dB/km 1550 nm for single-mode outside plant cable1.0 dB/km 1310 nm for single-mode ins
3、ide plant cable1.0 dB/km 1550 nm for single-mode inside plant cableConnector Attn (dB) = # of connector pairs * connector loss (dB)= 2 * 0.75 dB= 1.5 dBSplice Attn (dB) = # of splices (S) * splice loss (dB)= S * 0.3 dB,Primary Testing Interest,Optical power loss or attenuation Measures how much ligh
4、t is lost as passes through the link Must test fiber in both directions Also tests continuity of fiber,Signal Source,Signal Receiver,dB Loss,Singlemode,Multimode,Fiber Optic Cable,Core,Cladding,9/125 micron,62.5/125 micron,光纖各形式之剖面,光纖本體 1.core(62.5um,50um,8.3um) 2.cladding(125um) 3.Coating(250um),光纖
5、的模態 1.single-mode單模光纖(8.3/125um,9.3/125um,10/125um)laser 2.Multi-mode多模光纖(62.5/125um,50/125um)led 3.plastic fiber optic塑膠光纖laser(500um-2mm),光纖的種類 1.Tight Buffer Fiber(一般為室內運用) 2.Loose Tube Buffered Fiber(一般為室外使用),光纖波長 850nm,1300nm(Multi-Mode) 1310nm,1550nm(Single-Mode),波長,光纖的種類,(室內用),(室外用),光纖的衰減,160
6、MHZ/500MHZ 200MHZ/600MHZ 400MHZ/400MHZ 600MHZ-1000MHZ,光纖的頻寬 (850nm/1300nm),光纖的張力/佈放/溫度,1.室內:OFNOFNR(RISER)OFNP(PLENUM)L.S.(LOW SMOKE) 2.室外:架空直接埋地室外線管槽地下管路,運用範圍,Multi-Mode: SC,ST,FDDI(MIC),SMA Single-Mode: SC,ST,FC.PC,APC,光纖接頭種類,中間接續:溶接,壓接 終端接續:溶接,壓接,研磨,接續方式,藕合器 璧掛終端箱 機櫃式終端箱,終端設備,LOGHT SOURCE POWER METER O.T.D.R.,測試器,研磨紙 切割刀 剝線鉗 酒精拭紙 光電轉換器(TRANSCEIVER CONVERTER),相關器材,附表: 1,附表: 2,
