Raws li peb paub, txij li xyoo 1990, WDM WDM thev naus laus zis tau siv rau kev sib txuas ntev fiber ntau ntawm ntau pua lossis ntau txhiab mais. Rau feem ntau cov cheeb tsam ntawm lub teb chaws, fiber ntau infrastructure yog nws cov cuab tam kim tshaj plaws, thaum tus nqi ntawm transceiver Cheebtsam yog tsawg.
Txawm li cas los xij, nrog kev tawg ntawm cov ntaub ntawv tus nqi hauv cov tes hauj lwm xws li 5G, WDM thev naus laus zis tau dhau los ua qhov tseem ceeb hauv kev sib txuas luv luv ib yam nkaus, uas tau muab tso rau hauv ntau qhov loj dua thiab yog li ntawd ntau rhiab rau tus nqi thiab qhov loj ntawm transceiver sib dhos.
Tam sim no, cov tes hauj lwm no tseem cia siab rau ntau txhiab tus tib hom optical fibers kis tau los ntawm kev sib txuas los ntawm kev sib faib chaw sib faib, nrog cov ntaub ntawv tsawg tsawg ntawm ntau tshaj li ob peb puas Gbit / s (800G) rau ib channel, nrog tsawg tus ua tau. daim ntawv thov hauv T-class.
Txawm li cas los xij, nyob rau hauv lub neej yav tom ntej, lub tswv yim ntawm kev sib koom ua ke ntawm qhov sib npaug yuav sai sai mus txog qhov txwv ntawm nws qhov scalability, thiab yuav tsum tau ua kom tiav los ntawm spectral parallelisation ntawm cov ntaub ntawv ntws hauv txhua qhov fiber ntau txhawm rau txhawb nqa cov ntaub ntawv nce ntxiv. Qhov no tuaj yeem qhib tag nrho qhov chaw thov tshiab rau WDM thev naus laus zis, nyob rau hauv qhov siab tshaj plaws scalability nyob rau hauv cov nqe lus ntawm cov xov tooj thiab cov ntaub ntawv tus nqi yog qhov tseem ceeb.
Hauv cov ntsiab lus no,Optical zaus comb generator (FCG)plays lub luag haujlwm tseem ceeb raws li kev cog lus, ruaj khov, ntau lub teeb pom kev zoo uas tuaj yeem muab tau ntau tus neeg nqa khoom kho qhov muag zoo. Tsis tas li ntawd, ib qho tseem ceeb tshwj xeeb ntawm kev kho qhov muag zaus combs yog tias cov kab zuag yog qhov sib npaug ntawm qhov sib npaug, yog li so kom txaus rau qhov kev xav tau rau kev sib cuam tshuam ntawm pawg neeg saib xyuas thiab tsis txhob muaj kev tswj xyuas zaus uas yuav tsum tau muaj rau ib kab hauv ib qho qauv siv. ib tug array ntawm DFB lasers.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov txiaj ntsig zoo no siv tsis yog rau WDM transmitters nkaus xwb tab sis kuj rau lawv cov neeg txais, qhov twg discrete local oscillator (LO) arrays tuaj yeem hloov tau los ntawm ib lub tshuab hluav taws xob. Kev siv LO comb generators ntxiv txhawb nqa cov teeb liab ua haujlwm rau WDM raws, yog li txo cov neeg txais kev nyuaj thiab nce qib suab nrov.
Tsis tas li ntawd, kev siv LO comb teeb liab nrog rau theem-xauv rau kev sib txuas lus sib txuas txawm tias ua rau nws muaj peev xwm rov tsim kho lub sij hawm-sau waveform ntawm tag nrho WDM teeb liab, yog li them nyiaj rau kev puas tsuaj tshwm sim los ntawm optical nonlinearities hauv kev sib kis fiber ntau. Ntxiv nrog rau cov tswv yim zoo ntawm cov teeb liab sib kis, qhov loj me thiab cov nqi tsim khoom loj kuj tseem ceeb rau WDM transceivers yav tom ntej.
Yog li ntawd, ntawm ntau yam comb teeb liab generator tswv yim, chip-scale li tshwj xeeb yog txaus siab. Thaum ua ke nrog cov khoom siv hluav taws xob muaj peev xwm ua tau zoo heev rau cov ntaub ntawv teeb liab kev hloov pauv, multiplexing, routing thiab txais tos, cov khoom siv no tuaj yeem tuav tus yuam sij rau kev cog lus, muaj txiaj ntsig zoo WDM transceivers uas tuaj yeem tsim ntau ntau ntawm tus nqi qis, nrog rau kev xa mus txog li kaum. ntawm Tbit/s per fiber.
Cov duab hauv qab no qhia txog lub schematic ntawm WDM transmitter uas siv lub tshuab hluav taws xob ntau zaus FCG ua lub teeb ci ntau lub teeb.Lub FCG zuag teeb liab yog thawj zaug sib cais hauv demultiplexer (DEMUX) thiab tom qab ntawd nkag mus rau EOM electro-optical modulator. Los ntawm, lub teeb liab raug rau qib siab QAM quadrature amplitude modulation rau kev pom zoo spectral efficiency (SE).
Ntawm lub transmitter egress, cov channel yog recombined nyob rau hauv ib tug multiplexer (MUX) thiab WDM cov teeb liab kis tau los ntawm ib hom fiber ntau. Thaum kawg tau txais, lub wavelength division multiplexing receiver (WDM Rx), siv LO hauv zos oscillator ntawm 2nd FCG rau multiwavelength coherent nrhiav kom tau. Cov channel ntawm cov tswv yim WDM cov teeb liab raug cais los ntawm ib qho demultiplexer thiab pub rau lub coherent receiver array (Coh. Rx). qhov twg demultiplexing zaus ntawm lub zos oscillator LO yog siv los ua ib theem siv rau txhua tus txais coherent. Qhov kev ua tau zoo ntawm WDM txuas tau pom tseeb yog nyob ntawm qhov loj ntawm lub hauv paus comb teeb liab generator, tshwj xeeb tshaj yog cov kab dav dav thiab lub zog kho qhov muag ntawm ib kab comb.
Tau kawg, optical zaus comb tshuab tseem nyob rau theem kev loj hlob, thiab nws daim ntawv thov scenarios thiab kev lag luam loj me me. Yog tias nws tuaj yeem kov yeej cov kev tsis sib haum xeeb, txo cov nqi thiab txhim kho kev ntseeg tau, ces nws yuav ua tau kom ua tiav cov ntawv teev npe hauv kev sib kis tau zoo.
Post lub sij hawm: Nov-21-2024