WDM thiab DWDM
DWDM (tuab tuab WDM) feem ntau tham txog thaum tib neeg tham txog WDM system. Puas yog WDM puas yog tib yam li DWDM? Dab tsi yog qhov txawv ntawm lawv? Qhov tseeb, WDM thiab DWDM yog tib cov thev naus laus zis. Lawv yog cov npe ntawm WDM system hauv cov caij nyoog sib txawv, uas muaj kev sib raug zoo nrog keeb kwm kev txhim kho ntawm WDM thev naus laus zis.
Thaum xyoo 1980s, thaum pib ntawm kev sib txuas lus optical fiber, tib neeg xav thiab ua ntej tau txais ib qho kev yoj hluav taws xob kis tau rau hauv ob qhov poob qis ntawm qhov rais 1310nm thiab 1550nm qhov rais, uas yog, WDM system nrog 1310nm / 1550nm ob nthwv dej faib, uas muaj cov ntaub ntawv thov nyob rau hauv Suav teb. Lub kaw lus yog yooj yim, feem ntau siv cov fused WDM ntaus ntawv, nrog cov kab me me poob; yam tsis muaj lub khoos phis tawm suab, ntawm txhua lub chaw nres tsheb mus txuas ntxiv, ob lub koob thaij duab yob ua ntej tsis sib luag thiab kho qhov muag / hluav taws xob / kho qhov muag txuas rov qab tau nqa tawm, thiab tom qab ntawd rov siv rau qhov chaw nres tsheb tom ntej. Lub sijhawm ntev, WDM system yog lub kaw lus nrog lub suab yoj ntawm lub kaum ntawm nm, xws li 1310nm / 1550nm ob lub wavelength system (nrog lub sijhawm ntau tshaj 200 nm). Vim hais tias nyob rau hauv lub zwj ceeb ntawm lub sijhawm ntawd, nws tsis muaj peev xwm kom paub ob peb nm wavelength Team sib.
kev ua lag luam
Nrog kev lag luam tsim ntawm 1550nm qhov rai EDFA, WDM system tau nkag mus rau lub sijhawm tshiab. Hloov chaw siv 1310nm qhov rai, tib neeg tsuas yog xa cov ntau daim duab kho qhov muag cov paib ua pa hauv 1550nm qhov rai. Vim tias cov kab kev sib tsuam sib txuas ntawm WDM cov tshuab sib txawv me me (feem ntau 1.6nm), thiab EDFA optical amplifiers tau sib koom rau hauv lub qhov rais. Txhawm rau kom paub qhov txawv ntawm WDM cov kev ib txwm muaj, tib neeg hu rau WDM system nrog kaw nthwv dej ntev raws li qhov ntom ntaws WDM. Lub npe ntom ntom rau qhov theem rau ib sab ntu yoj yuv. Hauv lub sijhawm dhau los, WDM system yog ob peb xyoo ntawm ntu wavelength, uas yog ntau me dua, tsuas yog (0.8-2) nm, txawm tias< 0.8nm.="" qhov="" tseeb,="" tshuab="" wdm="" ntom="" yog="" cov="" ntawv="" qhob="" ntawm="" wdm.="" vim="" tias="" qhov="" kho="" qhov="" muag="" thauj="" khoom="" qhov="" sib="" txawv="" ntawm="" dwdm="" yog="" ze="" heev,="" peb="" yuav="" tsum="" xaiv="" cov="" khoom="" siab="" siab="" wdm,="" xws="" li="" planar="" waveguide="" lossis="" fiber="" grating,="" tsis="" txhob="" siv="" cov="" khoom="" siv="" fused="">
Hauv DWDM cov kev kho qhov muag hluav taws xob deb ntev, ntau cov kab hluav taws xob kho qhov muag nrog cov xov hluav taws xob me me tuaj yeem sib koom rau EDFA optical amplifiers. Nruab nrab ntawm ob WDM cov chaw xaus, ib qho EDFA yog siv es tsis txhob ntau cov kev siv hluav taws xob rov ua dua tshiab, thiab ntau lub teeb liab kho qhov muag tau nthuav dav kom txuas ntxiv qhov kis tau tus mob kis mus deb. Hauv DWDM system, EDFA optical amplifier thiab cov khoom siv kho qhov muag / hluav taws xob / kho qhov muag rov ua dua yuav nyob ua ke. EDFA yuav them rau qhov kev ploj ntawm cov kho qhov muag, thaum siv cov khoom siv kho qhov muag / hluav taws xob / kho qhov muag pom rov qab yog siv los them cov teeb liab cuam tshuam los ntawm kev tawg thiab cov suab nrov.
Qhov tseem ceeb editor
Cov tib neeg nyiam hu DWDM system WDM. Hauv cov ntsiab lus, DWDM tsuas yog ib daim ntawv ntawm WDM, WDM yog ntau dua thoob ntiaj teb, DWDM tsis muaj lub ntsiab lus meej thiab raug. Nrog rau kev txhim kho thev naus laus zis, nws tau xav tias qhov thiaj li hu ua ntom nti luv luv kuj tseem muaj ntau thiab ntau qhov yooj yim kom paub hauv kev siv thev naus laus zis, thiab nws tau ua tsawg dua" sib zog" ;. Feem ntau, yog tias peb tsis qhia' t hais tshwj xeeb rau 1310nm / 1550nm WDM system, tib neeg tham txog WDM system raws li DWDM system.
