[Introduction] Lub wavelength division multiplexing thev naus laus zis tuaj yeem siv tag nrho cov peev txheej bandwidth loj uas coj los ntawm qhov tsawg-tsawg ntawm ib hom fiber ntau. Raws li qhov zaus (lossis wavelength) ntawm lub teeb nthwv dej ntawm txhua lub channel, faib lub qhov rais qis qis ntawm cov fiber ntau rau hauv ob peb txoj kev, siv lub teeb nthwv dej raws li tus neeg nqa khoom ntawm lub teeb liab, thiab siv lub wavelength division multiplexer (multiplexer) ntawm kev xa xov kawg.
Lub wavelength division multiplexing thev naus laus zis tuaj yeem siv tag nrho cov peev txheej bandwidth loj uas coj los ntawm thaj tsam qis ntawm ib hom fiber ntau. Raws li qhov zaus (lossis wavelength) ntawm lub teeb nthwv dej ntawm txhua qhov channel, qhov qis qis ntawm lub qhov muag fiber ntau tau muab faib ua ntau txoj hauv kev, lub teeb nthwv dej yog siv los ua tus nqa khoom ntawm lub teeb liab, thiab lub wavelength division multiplexer (multiplexer). ) yog siv nyob rau hauv lub transmitting kawg. Cov teeb liab kho qhov muag ntawm lub wavelengths tau ua ke thiab xa mus rau hauv ib qho khoom siv kho qhov muag rau kev sib kis. Thaum kawg tau txais, lub wavelength division multiplexer (wave splitter) cais cov optical carriers nqa cov cim sib txawv ntawm cov wavelengths sib txawv. Txij li thaum lub teeb pom kev sib txawv ntawm qhov sib txawv wavelengths tuaj yeem suav tias yog kev ywj pheej ntawm ib leeg (tsis xav txog qhov nonlinearity ntawm optical fiber), multiplexing thiab kis ntawm ntau lub teeb liab kho qhov muag tuaj yeem pom tau hauv ib qho fiber ntau.
Fiber Access Technology
Kev siv fiber ntau optical network yog " mais kawg" ntawm cov ntaub ntawv loj. Yuav kom ua tiav cov ntaub ntawv ceev ceev thiab ua tau raws li cov kev xav tau ntawm cov pej xeem, tsis yog tsuas yog kev sib txuas lus dav dav, tab sis kuj yog tus neeg siv nkag mus rau qhov tseem ceeb. Optical fiber nkag network yog cov cuab yeej tseem ceeb rau cov ntaub ntawv ceev ceev nkag mus rau ntau txhiab tsev neeg. Hauv kev siv fiber ntau optical broadband, vim muaj qhov sib txawv tuaj txog ntawm cov khoom siv kho qhov muag, muaj cov kev siv sib txawv xws li FTTB, FTTC, FTTCab thiab FTTH, sib sau ua ke hu ua FTTx. Yog li ntawd, nws tuaj yeem siv tag nrho cov yam ntxwv ntawm broadband ntawm optical fibers, muab cov neeg siv nrog qhov yuav tsum tau muaj kev txwv bandwidth, thiab ua tau raws li qhov xav tau ntawm kev siv broadband. Tam sim no, thev naus laus zis hauv tsev tuaj yeem muab cov neeg siv nrog FE lossis GE bandwidth, uas yog txoj hauv kev zoo tshaj plaws rau cov neeg siv lag luam loj thiab nruab nrab.
Kev loj hlob ntawm Optical Fiber Communication Technology
Nyob rau hauv xyoo tas los no, nrog kev nce qib ntawm kev siv tshuab, kev hloov pauv ntawm kev tswj hwm kev sib txuas lus thiab maj mam qhib tag nrho ntawm kev lag luam hauv kev sib txuas lus, kev txhim kho ntawm kev sib txuas lus fiber ntau tau nthuav tawm ib qho teeb meem tshiab ntawm kev loj hlob. Cov hauv qab no yog cov lus qhia luv luv rau lub ntsiab kev loj hlob hotspots hauv kev sib txuas lus ntawm optical fiber. Cov lus piav qhia thiab kev cia siab, kev txhim kho ntawm ultra-high-speed systems, evolution mus rau ultra-loj-muaj peev xwm WDM systems.
Kev txiav txim siab los ntawm kev txhim kho kev sib txuas lus fiber ntau hauv xyoo tas los no, tsim lub teb chaws qaum teb optical network uas yog pob tshab tshaj plaws, hloov tau yooj yim thiab muaj peev xwm loj heev tuaj yeem tsis tsuas yog nteg lub hauv paus ruaj khov rau lub neej yav tom ntej National Information Infrastructure (NII), tab sis thiab kuv lub teb chaws cov ntaub ntawv kev lag luam nyob rau hauv ib puas xyoo tom ntej thiab kev tshem tawm ntawm lub teb chaws kev lag luam thiab kev ruaj ntseg hauv lub teb chaws muaj qhov tseem ceeb ntawm cov tswv yim tseem ceeb. Txoj kev loj hlob ntawm optical fiber kev lag luam kev sib txuas lus kuj yog ib tug irreversible qauv ntawm niaj hnub kev sib txuas lus.