Nyob rau hauv lub ntiaj teb no ntawm fiber optic kev sib txuas lus, kev xaiv ntawm lub teeb wavelength zoo li xov tooj cua zaus tuning thiab channel xaiv. Tsuas yog xaiv txoj cai "channel" tuaj yeem xa cov teeb liab kom meej thiab ruaj khov. Vim li cas qee qhov optical modules muaj qhov kis tau tus mob tsuas yog 500 meters, thaum lwm tus tuaj yeem hla ntau pua mais? Qhov paub tsis meej nyob hauv 'xim' ntawm lub teeb ntawm lub teeb - ntau qhov tseeb, lub wavelength ntawm lub teeb.
Hauv kev sib txuas lus kho qhov muag niaj hnub no, optical modules sib txawv wavelengths ua lub luag haujlwm sib txawv kiag li. Peb qhov tseem ceeb wavelengths ntawm 850nm, 1310nm, thiab 1550nm tsim lub hauv paus ntsiab lus ntawm kev sib txuas lus kho qhov muag, nrog rau kev faib tawm ntawm kev ua haujlwm nyob rau hauv cov nqe lus ntawm kev sib kis, cov yam ntxwv tsis zoo, thiab daim ntawv thov scenarios.
1.Vim li cas peb xav tau ntau lub wavelength?
Lub hauv paus ua rau muaj ntau haiv neeg ntawm wavelength nyob rau hauv optical modules nyob rau hauv ob qho kev sib tw loj nyob rau hauv fiber optic kis tau tus mob: poob thiab dispersion. Thaum cov teeb liab kho qhov muag raug xa mus rau hauv cov fibers kho qhov muag, lub zog attenuation (poob) tshwm sim vim kev nqus, tawg, thiab to ntawm qhov nruab nrab. Nyob rau tib lub sijhawm, qhov tsis sib xws ntawm kev nthuav tawm ceev ntawm cov khoom sib txawv wavelength ua rau cov teeb liab pulse broading (dispersion). Qhov no tau ua rau muaj ntau qhov kev daws teeb meem wavelength:
• 850nm band:Feem ntau ua haujlwm nyob rau hauv multimode optical fibers, nrog kev sib kis nrug feem ntau yog li ntawm ob peb puas meters (xws li ~ 550 meters), thiab yog lub zog tseem ceeb rau kev sib kis luv luv (xws li hauv cov chaw zov me nyuam).
• 1310nm band:nthuav tawm cov yam ntxwv tsis sib haum xeeb hauv cov qauv ib hom fibers, nrog rau kev sib kis mus txog li kaum mais (xws li ~ 60 mais), ua rau nws cov pob txha ntawm nruab nrab ntawm kev sib kis.
• 1550nm band:Nrog rau qhov qis qis qis tshaj (kwv yees li 0.19dB / km), qhov kev sib txuas lus theoretical tuaj yeem tshaj 150 mais, ua rau nws yog huab tais ntawm kev ncua deb thiab txawm tias kis tau tus mob ntev heev.
Qhov nce ntawm wavelength division multiplexing (WDM) thev naus laus zis tau nce lub peev xwm ntawm fiber ntau optical. Piv txwv li, ib leeg fiber ntau bidirectional (BIDI) optical modules ua tiav kev sib txuas lus bidirectional ntawm ib qho fiber ntau los ntawm kev siv cov wavelengths sib txawv (xws li 1310nm / 1550nm ua ke) ntawm kev xa tawm thiab tau txais qhov kawg, txuag nyiaj fiber ntau. Ntau tshaj Dense Wavelength Division Multiplexing (DWDM) thev naus laus zis tuaj yeem ua tiav qhov sib nrug ntawm qhov nqaim heev (xws li 100GHz) hauv cov bands tshwj xeeb (xws li O-band 1260-1360nm), thiab ib qho fiber ntau tuaj yeem txhawb nqa kaum lossis ntau pua ntawm wavelength raws, ua rau tag nrho cov kev sib kis tau mus rau qib Tbps thiab muaj peev xwm ua kom muaj peev xwm ntawm fiber ntau.
2.Yuav ua li cas tshawb fawb xaiv lub wavelength ntawm optical modules?
Kev xaiv ntawm wavelength yuav tsum muaj kev xav zoo ntawm cov hauv qab no tseem ceeb:
Kev sib kis nrug:
Kev ncua deb (≤ 2km): nyiam dua 850nm (multimode fiber ntau).
Nruab nrab nrug (10-40km): haum rau 1310nm (ib hom fiber ntau).
Ntev nrug (≥ 60km): 1550nm (ib hom fiber ntau) yuav tsum tau xaiv, lossis siv ua ke nrog lub tshuab hluav taws xob kho qhov muag.
Qhov yuav tsum tau muaj peev xwm:
Kev lag luam pa: Tsau wavelength modules txaus.
Muaj peev xwm loj, kev sib kis tau zoo: DWDM / CWDM thev naus laus zis yuav tsum tau ua. Piv txwv li, 100G DWDM qhov system ua haujlwm hauv O-band tuaj yeem txhawb nqa ntau qhov kev sib txuas ntawm cov kab hluav taws xob siab.
Kev xav txog tus nqi:
Tsau wavelength module: Tus nqi pib pib yog tus nqi qis, tab sis ntau lub wavelength qauv ntawm cov khoom seem yuav tsum tau khaws cia.
Tunable wavelength module: Cov peev txheej pib yog qhov siab, tab sis los ntawm kev hloov kho software, nws tuaj yeem npog ntau lub wavelengths, ua kom yooj yim rau kev tswj cov khoom seem, thiab nyob rau hauv lub sij hawm ntev, txo kev lag luam thiab kev tu kom yooj yim thiab cov nqi.
Daim ntawv thov scenario:
Data Center Interconnection (DCI): High ntom, low-power DWDM kev daws teeb meem yog qhov tseem ceeb.
5G fronthaul: Nrog rau kev xav tau siab rau tus nqi, latency, thiab kev ntseeg tau, qib kev lag luam tsim ib qho fiber ntau bidirectional (BIDI) modules yog ib qho kev xaiv.
Enterprise chaw ua si network: Nyob ntawm qhov kev ncua deb thiab bandwidth yuav tsum tau, tsawg-power, nruab nrab mus rau luv luv CWDM los yog tsau wavelength modules yuav xaiv tau.
3.Conclusion: Technological Evolution thiab yav tom ntej xav txog
Lub tshuab kho qhov muag module txuas ntxiv mus iterate sai. Cov khoom siv tshiab xws li wavelength selective keyboards (WSS) thiab kua siv lead ua kua ntawm silicon (LCoS) yog tsav kev txhim kho ntawm kev hloov kho qhov muag pom kev sib txuas ntau dua. Kev tsim kho tshiab uas tsom rau qee qhov tshwj xeeb, xws li O-band, yog qhov ua tau zoo tas li, xws li txo qis module fais fab noj thaum tswj kom txaus qhov muag pom teeb liab-rau-nruj piv (OSNR) npoo.
Nyob rau hauv lub neej yav tom ntej kev tsim kho network, engineers tsis tsuas yog yuav tsum tau xam qhov kev ncua deb ntawm kis tau tus mob thaum xaiv wavelengths, tab sis kuj soj ntsuam xyuas lub zog noj, kub adaptability, deploy ceev ceev, thiab tag nrho lifecycle kev khiav hauj lwm thiab txij nkawm nqi. Kev ntseeg siab kho qhov muag modules uas tuaj yeem ua haujlwm ruaj khov rau kaum mais hauv qhov chaw huab cua (xws li -40 ℃ txias txias) tau dhau los ua kev txhawb nqa tseem ceeb rau kev xa mus rau qhov chaw ua haujlwm nyuaj (xws li chaw taws teeb chaw taws teeb).
Lub sij hawm xa tuaj: Sep-18-2025