Nrog 5g tes hauj lwm nthuav tawm ntawm tawg - caj dab} caj dab ceev, cov ntaub ntawv xav tau zuj zus. Vim tias txheej kho qhov muag yog qhov chaw thauj khoom siv rau 5G, nws lub peev xwm yog tam sim no lub hom phiaj {{} tseem ceeb. Ib qho ntawm cov kev ua tau zoo tshaj plaws kom ntsuas tau tias lub peev xwm yog khaws cov fiber ntau cov muaj spectrum {6} ua rau txoj kev kho kho kho kho tshiab. Ib txoj kev dav hlau txhais tau tias muaj tsheb khiav ntau. Tsis ntev los no cov neeg tshiab no -, cpp {}}}}}}}}}} {} {} {} {} {} {}} Hauv qab no peb muab kev ncig xyuas nrawm rau koj ntawm cov zej zog spectral hauv no.
Kev tso quav
Fiber - Kev sib txuas lus optic, raws li lub npe cuam tshuam, siv teeb pom kev zoo li cov ntaub ntawv txuas ntxiv {}}} Tab sis tsis yog lub teeb yuav ua. Cov wavelengths txawv (ntxhib, sib txawv "xim") txom nyem ntau tus nqi ntawm Atticumtion hauv lub khob. Yog tias qhov poob yog siab dhau, lub teeb tsis tuaj yeem nqa cov ntaub ntawv siv tau deb heev.
Thawj wavelength uas cov kws tshawb nrhiav pom tias yog 850 nm, thiab pab pawg yog tseem hu tau "850 nm band." Txawm li cas los xij, nws cov kev ua kom zoo yog qhov tseem ceeb thiab tsis muaj qhov tseeb kho qhov muag ua haujlwm rau nws, yog li nws tau txwv tsis pub dhau- reach reach reach} reach reach...
Tom qab ua haujlwm mapped tawm ntawm "tsawg {{- poob qhov rai," Nm, uas silica fibers yog pob tshab feem ntau. Daim duab hauv qab no qhia tau tias yuav muaj kev sib txawv li cas nrog wavelength thoob plaws ntau yam no.
Lub 1260 nm-1625 nm lub qhov rais yog txuas ntxiv mus rau tsib yoj- band, s} band,} band} band.
O - band
O - band spans 1260 nm-1360 nm.
Because light in this window suffers the least chromatic-dispersion distortion and the lowest loss, it was the first region used for optical transmission-hence the name "O-band," where O stands for "Original."
E - band
E - band wavelength ntau: 1360 nm-1460 nm. Nws yog qhov tsawg tshaj plaws ntawm tsib pawg; "E" sawv ntsug rau "txuas ntxiv." Qhov poob - versus -}}}} ion ions hauv lub qhov rai no tau hu ua cov dej ncov. Cov txiv neej ntxov muaj cov dej uas muaj cov khoom tsis zoo, yog li e {{} band txom nyem qhov chaw ua haujlwm siab tshaj plaws thiab tau siv tau rau kev sib kis tau. Modern fiber-manufacturing (ITU-T G.652.D) removes virtually all OH⁻, pushing E-band loss below O-band levels and turning the formerly "forbidden" region into a usable highway.
S - band
S - band wavelength ntau: 1460 nm-1530 nm. "S" sawv rau "luv - wavelength." Nws qhov kev sib kis tau yog qis dua qhov ntawd ntawm O- band thiab siv feem ntau siv ua cov dej ntws hauv qab (passive kho qhov muag network).
C - band
C - band wavelength ntau: 1530 nm-1565 nm. "C" sawv ntsug rau "pa." Nws muaj qhov qis tshaj plaws tau hloov fiber ntau thiab yog siv dav hauv metro, ntev} haul, ultra {} haul, thiab submarine cable tshuab. Nws tseem siv tau hauv nthwv dej - division multiplexing networks.
L - band
L - band wavelength ntau: 1565 nm-1625 nm. "L" sawv ntsug rau "ntev - wavelength." Nws muaj qhov thib ob -} Qhov qis fiber ntau kis tau ploj thiab yog siv los ua qhov muaj peev xwm txuas ntxiv thaum c} band ib leeg tsis tuaj yeem ntsib bandwidth xav tau.
U - band
Ntxiv rau tsib pab pawg saum toj no, muaj ib zaug ntxiv rau kev pabcuam: U {{{0} band.
U {- band wavelengthe ntau: 1625 NM-1675 nm; "U" sawv ntsug rau "ultra- ntev - wavelength."
Vim tias kev poob yog cim siab dua, lub qhov rais no yuav luag tshwj xeeb rau luag rau network {}} saib xyuas channels ntau dua li siab {2} {tus nqi tsheb.
CE / CPP / C + L BANDS
Cov haujlwm ua haujlwm ntawm kev thauj tawm ntawm lub cev ib txwm yog cov kev sib txuas ntawm c - band: 1529.16 nm - 1560.61 nm.
Txhawm rau ncab nws lub peev xwm, engineers tam sim no ua si ntawm cov av uas nyob ib sab.
Qhov peb tshiab "nthuav ntau ntau" yog CE, CPP thiab C + L; Ntawm no yog ntau npaum li cas spectrum ib leeg qiv los ntawm cov neeg zej zog.
CE BAND
Lub CE (C txuas) band, tseem hu ua C + band, txuas ntxiv tshaj cov pand los ntawm kev qiv ib feem ntawm l band (ntev} wavelength band). Thaum lub C b b b b band ntxaib ntxig 1530-1565 nm thiab yog ib txwm muab faib ua 80 xyoo ntawm 0.29.16 nm txog 1567.14 nm. Qhov no 96-kab tsib daim phiaj (C96) ntxiv 16 ntxiv wavelengths, txhawb nqa thauj khoom muaj peev xwm los ntawm 20% piv nrog tus qauv C band.
CPP Band
Lub CPP (c ntxiv rau ntxiv) qhab cand kuj tseem hu ua c ++ band. Lub CPP Band tsis tsuas yog qiv cov khoom siv nthwv dej los ntawm Land zoo li lub rooj sib tw, nthuav dav nthwv dej, nthuav dav ntawm thaj tsam ntawm 1524.30nm rau 1572.27nm. Raws li cov peev txheej ntawm txhua tus channel nyob rau hauv ib qho channel nyob rau 0.4 nm band ntau haiv neeg, pab pawg band tuaj yeem muab faib ua 120 raws cov ntaub ntawv kis. Yog li ntawd, CPP Band tseem muaj lub npe hu ua C120 Band. Tus nqi kis tau ntawm CPP band tau nce los ntawm 50% piv rau c {{11} band.
C + L BD
C + L BAND cia txhais tau hais tias ob qho tib si c thiab L Band cov kev pab cuam yog siv rau kev sib txuas lus kho qhov muag. Muaj peb lub sijhawm sib kis kis rau C + L qhab, raws li cov peev txheej ntawm 0.4 nm rau txhua tus channel.
C 120+ L80: CPP Band (120 Raws) + L}}}}}}}}}}}} ™ System. Land yog tiag Ly + qhab, nrog nthwv cua ntau ntawm 1575.16NM txog 1617.66NM. Tus kis tau muaj peev xwm ntawm c120+ l80 l80 prineme tau nce los ntawm 1.5 zaug piv rau c} band.
C 96+ l96: CE Band (96 Raws) + L Band (96 Raws), Ua tiav xyoo 192 yoj. Land yog ua tau l ++ band, nrog nthwv dej ntau ntawm 1575.16nm rau 1626.43nm. Tus kis tau muaj peev xwm ntawm c 96+ l96 kis tau nce los ntawm ntau dua ob zaug piv rau c}} band.
C 120+ l96: CPP Band (120 Raws) + L Band (96 Raws), Ua tiav A 216 Wave System. Land yog ua tau l ++ band, nrog nthwv dej ntau ntawm 1575.16nm rau 1626.43nm. Tus kis tau muaj peev xwm ntawm c 120+ l96 kis tau nce los ntawm kwv yees li 2 lub sij hawm piv rau c} band.
Lub ntsiab
Hauv ntej, cov kws tshawb fawb tau nthuav dav cov khoom siv wavelength ntawm Optical fibers rau ntau qhov ntau. Txawm li cas los xij, cov ntawv thov tseeb ntawm cov pawg band los sib txuas lus xws li 5G kuj tseem cuam tshuam los ntawm cov hauv qab no. Vim tias cov kev txwv ntawm cov khoom siv kho qhov muag, piv txwv li, cov cuab yeej siv kho tshiab tsis tuaj yeem txhawb nqa cov hlua tshiab nthuav dav thiab yuav tsum tau hloov kho tshiab. Cov khoom siv nquag xws li erbium -}}} Cov khoom siv hluav taws xob muaj txiaj ntsig (} band, thiab thaum kawg nce kev nqis peev. Nws yog ib tug neeg ua haujlwm tau ua tag nrho cov peev txheej muaj fiber ntau, nthuav dav muaj fiber ntau band band cov peev xwm ua lub hom phiaj ntawm kev sib txuas lus kev sib txuas lus zoo. Tam sim no, qee tus neeg ua haujlwm tau pib xa CPP Band kho qhov muag tes hauj lwm kho qhov muag. Nrog rau kev txhim kho kev txhim kho sai, peb yuav tau pom cov kev sib txuas lus kho qhov muag siv tau siv C + L pab txhawb kev daws teeb meem yav tom ntej.