Lefatšeng la likhokahano tsa fiber optic, khetho ea bolelele ba maqhubu a khanya e tšoana le tokiso ea maqhubu a seea-le-moea le khetho ea kanale. Ke feela ka ho khetha "channel" e nepahetseng moo lets'oao le ka fetisoang ka mokhoa o hlakileng le o tsitsitseng. Hobaneng ha li-module tse ling tsa optical li na le sebaka sa phetisetso sa limithara tse 500 feela, ha tse ling li ka nka sebaka sa lik'hilomithara tse makholo? Sephiri se ka har'a 'mala' oa lehlaseli leo la leseli - ka nepo, bolelele ba maqhubu a khanya.
Mecha ea sejoale-joale ea puisano ea optical, li-module tsa optical tsa wavelengths tse fapaneng li bapala likarolo tse fapaneng ka ho felletseng. Maqhubu a mararo a mantlha a 850nm, 1310nm, le 1550nm a theha moralo oa mantlha oa puisano ea optical, ka karohano e hlakileng ea mosebetsi ho latela sebaka sa phetisetso, litšobotsi tsa tahlehelo, le maemo a ts'ebeliso.
1.Hobaneng re hloka maqhubu a mangata a mangata?
Sesosa sa mefuta e sa tšoaneng ea maqhubu ho li-module tsa optical ke liphephetso tse peli tse kholo tsa phetiso ea fiber optic: tahlehelo le ho hasana. Ha matšoao a optical a fetisoa ka likhoele tsa optical, ho fokotsa matla (tahlehelo) ho etsahala ka lebaka la ho monya, ho hasana le ho lutla ha mahareng. Ka nako e ts'oanang, lebelo le sa lekaneng la ho hasana la likarolo tse fapaneng tsa maqhubu a maqhubu le baka ho ata ha lets'oao (ho hasana). Sena se hlahisitse tharollo ea multi wavelength:
•850nm sehlopha:haholo-holo e sebetsa ka li-multimode optical fibers, tse nang le libaka tsa phetisetso ka tloaelo ho tloha ho limithara tse makholo a seng makae (joaloka ~ 550 metres), 'me ke matla a ka sehloohong a phetiso ea sebaka se sekhutšoanyane (joaloka ka har'a litsi tsa data).
•1310nm sehlopha:e bonts'a litšoaneleho tse tlase tsa ho hasana ka likhoele tse tloaelehileng tsa mofuta o le mong, tse nang le sebaka sa phetisetso ho fihla ho lik'hilomithara tse mashome (joalo ka ~ lik'hilomithara tse 60), se e etsa mokokotlo oa phetiso ea sebaka se mahareng.
•1550nm sehlopha:Ka sekhahla se tlase haholo sa ho nyenyefatsa (hoo e ka bang 0.19dB/km), sebaka sa phetisetso ea theory se ka feta lik'hilomithara tse 150, se etsa hore e be morena oa phetisetso ea sebaka se selelele esita le ho fetesisa haholo.
Ho phahama ha theknoloji ea wavelength division multiplexing (WDM) ho ekelitse matla a optical fibers haholo. Ka mohlala, li-single fiber bidirectional (BIDI) optical modules li finyella puisano ea bidirectional holim'a fiber e le 'ngoe ka ho sebelisa mefuta e fapaneng ea maqhubu (e kang 1310nm / 1550nm motsoako) ho fetisetsa le ho amohela lipheletsong, haholo ho boloka mehloli ea fiber. Theknoloji e tsoetseng pele ea Dense Wavelength Division Multiplexing (DWDM) e ka finyella sebaka se senyenyane haholo sa wavelength (joaloka 100GHz) ka lihlopha tse khethehileng (tse kang O-band 1260-1360nm), 'me fiber e le' ngoe e ka tšehetsa litsela tse ngata kapa tse makholo tsa leqhubu la maqhubu, ho eketsa matla a phetisetso ho ea ho Tbps.
2.How ho khetha ka saense ho wavelength ya dimmojule optical?
Ho khethoa ha wavelength ho hloka hore ho nahanoe ka botlalo lintlha tse latelang tsa bohlokoa:
Sebaka sa phetiso:
Sebaka se sekhutšoanyane (≤ 2km): ka ho khetheha 850nm (fiber multimode).
Sebaka se mahareng (10-40km): se loketse 1310nm (fiber e nang le mokhoa o le mong).
Sebaka se selelele (≥ 60km): 1550nm (fiber-mode e le 'ngoe) e tlameha ho khethoa, kapa e sebelisoe hammoho le amplifier ea optical.
Tlhokahalo ea bokhoni:
Khoebo e tloaelehileng: Li-modules tse tsitsitseng tsa wavelength li lekane.
Bokhoni bo boholo, phetisetso e phahameng haholo: Theknoloji ea DWDM / CWDM ea hlokahala. Ka mohlala, tsamaiso ea 100G DWDM e sebetsang ho O-band e ka tšehetsa liteishene tse ngata tse phahameng tsa maqhubu a maqhubu.
Litšenyehelo:
Fixed wavelength module: Theko ea yuniti ea pele e batla e le tlase, empa mefuta e mengata ea maqhubu a likarolo tse ling e hloka ho bolokoa.
Tunable wavelength module: Chelete ea pele ea lichelete e batla e phahame, empa ka ho lokisa software, e ka koahela maqhubu a mangata a mangata, ea nolofatsa tsamaiso ea likarolo tse ling, 'me qetellong ea fokotsa ts'ebetso le tlhokomelo e rarahaneng le litšenyehelo.
Boemo ba ts'ebeliso:
Khokahano ea Setsi sa Boitsebiso (DCI): Litharollo tsa DWDM tse nang le matla a tlase li atile haholo.
5G fronthaul: Ka litlhoko tse phahameng tsa litšenyehelo, latency, le ho tšepahala, li-module tsa liindasteri tse entsoeng ka fiber bidirectional (BIDI) tse le 'ngoe ke khetho e tloaelehileng.
Marang-rang a park park: Ho ipapisitsoe le litlhoko tsa bohole le li-bandwidth, matla a tlase, CWDM e hole ho isa ho e khuts'oane kapa li-module tsa wavelength tse tsitsitseng li ka khethoa.
3.Qetello: Kholiso ea Theknoloji le Menahano ea Bokamoso
Theknoloji ea optical module e ntse e tsoela pele ho pheta-pheta ka potlako. Lisebelisoa tse ncha tse kang li-wavelength selective switches (WSS) le kristale ea metsi holim'a silicon (LCoS) li tsamaisa nts'etsopele ea meralo ea meralo ea marang-rang e bonolo haholoanyane. Litlhahiso tse lebisitseng lihlopha tse khethehileng, tse kang O-band, li lula li ntlafatsa tshebetso, joalo ka ho fokotsa haholo tšebeliso ea matla a module ha li ntse li boloka moeli o lekaneng oa optical signal-to-noise ratio (OSNR).
Mohahong oa marang-rang oa nakong e tlang, baenjiniere ha ba hloke feela ho bala sebaka sa phetisetso ka nepo ha ba khetha maqhubu a maqhubu, empa hape ba lekola ka botlalo tšebeliso ea matla, ho feto-fetoha ha mocheso, sekhahla sa ho tsamaisa, le litšenyehelo tse felletseng tsa ts'ebetso ea bophelo le litšenyehelo tsa tlhokomelo. Li-module tsa optical tse tšepahalang tse phahameng tse ka sebetsang ka mokhoa o tsitsitseng bakeng sa lik'hilomithara tse mashome libakeng tse feteletseng (tse kang -40 ℃ serame se matla) li fetoha ts'ehetso ea bohlokoa bakeng sa libaka tse rarahaneng tsa ho romelloa (joaloka liteishene tse hōle).
Nako ea poso: Sep-18-2025