Txawm yog txuas cov zej zog lossis hla cov teb chaws loj, qhov ceev thiab qhov tseeb yog ob qho tseem ceeb uas yuav tsum tau ua rau cov tes hauj lwm fiber optic uas nqa cov kev sib txuas lus tseem ceeb. Cov neeg siv xav tau cov kev sib txuas FTTH sai dua thiab 5G mobile sib txuas kom ua tiav telemedicine, autonomous vehicle, video conferencing thiab lwm yam kev siv bandwidth ntau. Nrog rau kev tshwm sim ntawm ntau lub chaw khaws ntaub ntawv thiab kev loj hlob sai ntawm kev txawj ntse thiab kev kawm tshuab, ua ke nrog kev ceev network sai dua thiab kev txhawb nqa ntawm 800G thiab siab dua, txhua yam ntxwv ntawm fiber tau dhau los ua qhov tseem ceeb.
Raws li tus qauv ITU-T G.650.3, qhov kev ntsuas lub sijhawm optical domain reflectometer (OTDR), lub cuab yeej kuaj qhov muag poob (OLTS), chromatic dispersion (CD), thiab polarization mode dispersion (PMD) yog qhov yuav tsum tau ua kom tiav kev txheeb xyuas fiber ntau thiab xyuas kom muaj kev ua haujlwm siab hauv network. Yog li ntawd, kev tswj hwm cov nqi CD yog qhov tseem ceeb rau kev ua kom muaj kev sib kis zoo thiab kev ua haujlwm zoo.
Txawm hais tias CD yog ib qho yam ntxwv ntawm txhua lub fibers optical, uas yog qhov txuas ntxiv ntawm broadband pulses hla qhov deb ntev, raws li ITU-T G.650.3 tus qauv, kev sib kis ua teeb meem rau cov fibers optical nrog cov ntaub ntawv xa mus tshaj 10 Gbps. CD tuaj yeem cuam tshuam loj heev rau qhov zoo ntawm lub teeb liab, tshwj xeeb tshaj yog nyob rau hauv cov kab ke sib txuas lus ceev ceev, thiab kev sim yog qhov tseem ceeb rau kev daws qhov teeb meem no.
CD yog dab tsi?
Thaum lub teeb pulses ntawm ntau qhov wavelengths kis mus rau hauv cov fibers optical, qhov kev tawg ntawm lub teeb tuaj yeem ua rau lub pulse overlap thiab distortion, thaum kawg ua rau qhov zoo ntawm lub teeb liab kis tau txo qis. Muaj ob hom kev tawg: cov khoom tawg thiab waveguide dispersion.
Cov khoom siv sib kis yog ib qho tseem ceeb hauv txhua hom fibers optical, uas tuaj yeem ua rau cov wavelengths sib txawv kom nthuav dav ntawm qhov ceev sib txawv, thaum kawg ua rau cov wavelengths ncav cuag lub transceiver chaw taws teeb ntawm lub sijhawm sib txawv.
Qhov kev tawg ntawm cov waveguide tshwm sim hauv cov qauv waveguide ntawm cov fibers optical, qhov twg cov teeb liab optical kis mus rau hauv lub hauv paus thiab cladding ntawm cov fibers, uas muaj cov ntsuas refractive sib txawv. Qhov no ua rau muaj kev hloov pauv hauv txoj kab uas hla ntawm lub teb hom thiab kev hloov pauv hauv qhov ceev ntawm lub teeb liab ntawm txhua qhov wavelength.
Kev tswj hwm qee qib ntawm CD yog qhov tseem ceeb heev kom tsis txhob muaj lwm yam teebmeem nonlinear, yog li ntawd xoom CD tsis yog qhov zoo. Tab sis CD yuav tsum tau tswj hwm ntawm qib uas txais tau kom tsis txhob muaj kev cuam tshuam tsis zoo rau kev ncaj ncees ntawm lub teeb liab thiab qhov zoo ntawm kev pabcuam.
Qhov cuam tshuam ntawm hom fiber rau kev sib kis yog dab tsi?
Raws li tau hais ua ntej lawm, CD yog ib qho yam ntxwv ntawm txhua yam fiber ntau optical, tab sis hom fiber ua lub luag haujlwm tseem ceeb hauv kev tswj CD. Cov neeg ua haujlwm hauv network tuaj yeem xaiv cov fiber ntau "ntuj" lossis cov fiber ntau nrog cov kab sib txawv kom txo qhov cuam tshuam ntawm CD hauv qhov ntau thiab tsawg wavelength.
Cov fiber ntau tshaj plaws hauv cov tes hauj lwm niaj hnub no yog tus qauv ITU-T G.652 fiber nrog kev sib kis ntuj. ITU-T G-653 xoom dispersion hloov fiber tsis txhawb nqa DWDM kis, thaum G.655 tsis yog xoom dispersion hloov fiber muaj CD qis dua, tab sis tau ua kom zoo dua rau kev ncua deb thiab kuj kim dua.
Thaum kawg, cov neeg teb xov tooj yuav tsum nkag siab txog cov hom fiber optics hauv lawv cov tes hauj lwm. Yog tias feem ntau ntawm cov fibers optical yog tus qauv G.652, tab sis qee qhov yog lwm hom fibers, ces yog tias cov CDs hauv txhua qhov txuas tsis pom, qhov zoo ntawm kev pabcuam yuav raug cuam tshuam.
Xaus lus
Kev tawg ntawm cov xim tseem yog ib qho kev sib tw uas yuav tsum tau daws kom ntseeg tau tias muaj kev ntseeg siab thiab kev ua haujlwm zoo ntawm cov kab ke sib txuas lus ceev ceev. Cov yam ntxwv ntawm fiber thiab kev sim yog qhov tseem ceeb rau kev daws qhov teeb meem ntawm kev tawg, muab kev nkag siab rau cov kws tshaj lij thiab cov engineers los tsim, xa tawm, thiab tswj cov khoom siv uas nqa cov kev sib txuas lus tseem ceeb thoob ntiaj teb. Nrog rau kev txhim kho thiab kev nthuav dav ntawm lub network, Softel yuav txuas ntxiv tsim kho tshiab thiab tso tawm cov kev daws teeb meem rau kev ua lag luam, ua tus thawj coj hauv kev txhawb nqa kev siv cov thev naus laus zis siab heev.
Lub sijhawm tshaj tawm: Lub Peb Hlis-20-2025