Wavelength Division Multiplexing
Wavelength Division Multiplexing Technology WDM (Wavelength Division Multiplexing)
Wavelength division multiplexing siv tib lub fiber ntau los xa ntau lub teeb pom kev sib txawv ntawm cov wavelengths sib txawv los txhim kho kev sib kis ntawm ib qho fiber ntau. Vim tias lub teeb ci ntawm kev sib txuas lus kho qhov muag tsuas yog nyob ib feem nqaim ntawm "qhov rais" ntawm kev sib txuas lus kho qhov muag, tseem muaj thaj chaw loj uas tsis siv.
WDM tseem tuaj yeem suav tias yog qhov sib txawv ntawm FDM siv rau Fiber Channel. Yog tias cov teeb liab kho qhov muag nrog cov wavelengths sib txawv tau xa mus rau tib lub fiber ntau optical yam tsis muaj kev cuam tshuam rau ib leeg, cov ntaub ntawv muaj peev xwm tuaj yeem nce ntxiv los ntawm kev siv ntau lub teeb pom kev zoo nrog rau qhov tsim nyog staggered wavelengths xa lawv cov ntaub ntawv ntawm ib qho khoom siv fiber ntau tib lub sijhawm. Txij li cov wavelengths sib txawv tau siv los xa lawv cov ntaub ntawv, lawv yuav tsis cuam tshuam rau ib leeg txawm nyob rau tib lub fiber ntau. Thaum hloov dua siab tshiab rau hauv cov teeb liab hluav taws xob ntawm qhov kawg tau txais, cov ntaub ntawv xa los ntawm txhua qhov teeb pom kev ntawm qhov sib txawv wavelengths tuaj yeem tswj hwm nws tus kheej. Txoj kev no hu ua "wavelength division multiplexing".
Yog tias cov khoom siv kho qhov muag sib txawv ntawm qhov sib txawv wavelengths nqa cov ntaub ntawv sib xyaw ua ke thiab xa mus raws ib qho kev kho qhov muag fiber ntau nrog lub caij nyoog wavelength ntawm 1 mus rau ob peb puas nanometers hauv qhov chaw kho qhov muag, thiab tom qab ntawd qee txoj kev siv ntawm lub receiver los hloov qhov sib txawv wavelengths. . lub optical carrier cais. Kev teeb tsa 100 qhov chaw teeb pom kev zoo nrog cov wavelengths sib txawv ntawm lub qhov rais ua haujlwm ntawm cov khoom siv kho qhov muag thiab xa cov ntaub ntawv nqa los ntawm txhua tus ntawm ib qho khoom siv kho qhov muag tib lub sijhawm tuaj yeem ua rau muaj peev xwm ntawm kev sib txuas lus fiber ntau ntawm 100 zaug.