Peb paub tias txij li xyoo 1990, WDM wavelength division multiplexing thev naus laus zis tau siv rau kev sib txuas ntawm fiber ntau optic ntev ntau pua lossis ntau txhiab mais. Rau ntau lub teb chaws thiab cheeb tsam, fiber ntau optic infrastructure yog lawv cov cuab tam kim tshaj plaws, thaum tus nqi ntawm cov khoom siv transceiver kuj tsawg.
Txawm li cas los xij, nrog kev loj hlob ntawm cov ntaub ntawv sib txuas hauv network xws li 5G, WDM thev naus laus zis tau dhau los ua qhov tseem ceeb hauv kev sib txuas luv luv, thiab kev xa tawm ntim ntawm cov txuas luv luv yog qhov loj dua, ua rau tus nqi thiab qhov loj ntawm cov khoom siv transceiver rhiab heev.
Tam sim no, cov tes hauj lwm no tseem cia siab rau ntau txhiab tus tib hom optical fibers rau kev sib txuas sib txuas los ntawm qhov chaw faib khoom sib txuas, thiab cov ntaub ntawv tus nqi ntawm txhua channel yog qhov tsawg, feem ntau tsuas yog ob peb puas Gbit / s (800G). T-level tej zaum yuav muaj kev txwv tsis pub siv.
Tab sis nyob rau hauv lub neej yav tom ntej, lub tswv yim ntawm ib tug zoo tib yam spatial parallelization yuav sai sai no mus txog nws scalability txwv, thiab yuav tsum tau supplemented los ntawm spectrum parallelization ntawm cov ntaub ntawv kwj nyob rau hauv txhua fiber ntau kom muaj kev txhim kho ntxiv nyob rau hauv cov ntaub ntawv nqi. Qhov no tuaj yeem qhib tag nrho qhov chaw thov tshiab rau wavelength division multiplexing thev naus laus zis, qhov twg qhov siab tshaj plaws ntawm tus lej channel thiab cov ntaub ntawv tus nqi yog qhov tseem ceeb.
Nyob rau hauv cov ntaub ntawv no, lub zaus zuag generator (FCG), raws li ib tug compact thiab tsau multi wavelength lub teeb qhov chaw, muaj peev xwm muab tau ib tug loj tus naj npawb ntawm cov neeg kho qhov muag pom zoo, yog li ua lub luag hauj lwm tseem ceeb. Tsis tas li ntawd, qhov tseem ceeb tshwj xeeb ntawm kev kho qhov muag zaus zuag yog tias cov kab zuag yog qhov tseem ceeb sib npaug ntawm qhov zaus, uas tuaj yeem txo qhov yuav tsum tau muaj rau inter channel guard bands thiab zam kev tswj ntau zaus uas yuav tsum tau muaj rau ib kab hauv cov txheej txheem ib txwm siv DFB laser arrays.
Nws yuav tsum raug sau tseg tias qhov zoo no tsis yog tsuas yog siv tau rau lub transmitter ntawm wavelength division multiplexing, tab sis kuj rau nws cov receiver, qhov twg discrete local oscillator (LO) array tuaj yeem hloov tau los ntawm ib lub tshuab hluav taws xob. Kev siv LO comb generators tuaj yeem pab txhawb cov teeb liab digital ua haujlwm hauv wavelength division multiplexing channels, yog li txo cov neeg txais kev nyuaj siab thiab txhim kho theem suab nrov.
Tsis tas li ntawd, siv LO comb signals nrog rau theem-xauv muaj nuj nqi rau kev txais tos zoo sib xws tuaj yeem rov tsim kho lub sij hawm-sau waveform ntawm tag nrho wavelength division multiplexing teeb liab, yog li them nyiaj rau qhov kev puas tsuaj los ntawm optical nonlinearity ntawm kev sib kis fiber ntau. Ntxiv nrog rau qhov zoo ntawm lub tswv yim raws li kev sib txuas lus sib txuas, qhov loj me thiab kev lag luam loj hlob zoo kuj tseem ceeb rau yav tom ntej wavelength division multiplexing transceivers.
Yog li ntawd, ntawm ntau yam kev sib txuas lus tshuab hluav taws xob lub tswv yim, cov khoom siv qib nti yog qhov tshwj xeeb. Thaum ua ke nrog cov khoom siv hluav taws xob sib txuas ua ke zoo heev rau cov ntaub ntawv teeb liab hloov pauv, multiplexing, routing, thiab txais tos, cov khoom siv no yuav dhau los ua qhov tseem ceeb rau kev sib cog lus thiab muaj txiaj ntsig wavelength division multiplexing transceivers uas tuaj yeem tsim ntau ntau ntawm tus nqi qis, nrog rau kev sib kis ntawm kaum tawm. Tbit/s rau fiber ntau.
Ntawm qhov tso zis ntawm qhov kawg xa tawm, txhua qhov channel yog rov ua dua los ntawm multiplexer (MUX), thiab lub wavelength division multiplexing signal yog kis los ntawm ib hom fiber ntau. Thaum kawg tau txais, lub wavelength division multiplexing receiver (WDM Rx) siv lub LO hauv zos oscillator ntawm FCG thib ob rau kev cuam tshuam ntau lub wavelength. Cov channel ntawm cov input wavelength division multiplexing signal yog sib cais los ntawm ib tug demultiplexer thiab ces xa mus rau ib coherent receiver array (Coh. Rx). Ntawm lawv, qhov demultiplexing zaus ntawm lub zos oscillator LO yog siv raws li theem siv rau txhua tus txais kev sib txuas. Qhov kev ua tau zoo ntawm qhov sib faib wavelength multiplexing txuas pom tseeb yog nyob ntawm qhov yooj yim comb teeb liab generator, tshwj xeeb tshaj yog qhov dav ntawm lub teeb thiab lub zog kho qhov muag ntawm txhua kab comb.
Yog lawm, optical zaus zuag thev naus laus zis tseem nyob rau theem kev txhim kho, thiab nws cov 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, nws tuaj yeem ua tiav cov ntawv thov qib hauv kev xa khoom kho qhov muag.
Post lub sij hawm: Dec-19-2024