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1. Ki teknoloji WDM?
Nan menm fib optik la, de oswa plis siyal longèdonn optik transmèt enfòmasyon nan diferan chanèl optik an menm tan an, ki rele optik longèdonn divizyon teknoloji miltiplikasyon, oswa WDM pou kout.
2. prensip k ap travay nan WDM
WDM konbine siyal optik pote enfòmasyon men longèdonn diferan nan yon sèl gwo bout bwa epi transmèt yo sou yon sèl fib optik; an fen transmèt yo, yo konbine pa yon multiplexer (yo rele tou yon multiplexer, MulTIplexer) ak makonnen ak liy lan menm optik. Teknoloji transmisyon nan yon rasin fib optik; nan fen a k ap resevwa, siyal la optik nan longèdonn divès kalite separe pa yon demultiplexer (yo rele tou yon demultiplexer oswa demultiplexer, DemulTIplexer), ak Lè sa a, plis trete pa reseptè a optik Retabli siyal orijinal la.
Pou mete l 'tou senpleman, nou ka panse tou nan WDM kòm yon wout-diferan kalite machin inondasyon nan wout sa a, ak Lè sa a ale sou pwòp yo apre yo fin rive destinasyon an.
Fonksyon WDM se pou ogmante kapasite transmisyon an nan fib optik ak amelyore efikasite nan itilizasyon resous fib optik.
3. Klasifikasyon nan WDM
Souvan itilize teknoloji WDM gen ladan CWDM ak DWDM
1) teknoloji CWDM
Pou yon sistèm WDM, si ou vle li travay nòmalman, ou evidamman bezwen kontwole longèdonn chak siyal optik. Si entèval longèdonn la twò kout, li fasil pou "aksidan". Si entèval longèdonn lan twò lontan, to itilizasyon an ba anpil.
Nan premye jou yo, kondisyon teknik yo te limite, epi entèval longèdonn ta dwe kontwole nan kèk dizèn nm. Sa a kalite miltiplikasyon divizyon longèdonn relativman dispèse yo rele divizyon miltiplikasyon divizyon longèdonn, ki rele tou koryas divizyon miltiplikasyon longèdonn, ki se CWDM (Koryas WDM)
Ranje a longèdonn inisyal la nan CWDM se 1270nm 1610nm, entèval nan longèdonn se 20nm, e gen 18 Gwoup Mizik. Yo nan lòd yo fè distenksyon ant longèdonn CWDM ak longèdonn konvansyonèl yo, Inyon telekominikasyon entènasyonal la chanje li ak deplase sant chanèl la pa 1nm, se konsa longèdonn sant lan se 1271nm 1611nm. Paske gen yon ogmantasyon siyifikatif nan atenuasyon nan gwoup la 1270-1470nm, anpil fin vye granmoun-kalite fib optik pa ka itilize nòmalman, se konsa longèdonn la pi pito nan CWDM se sèlman 1471nm-1611nm, ak 8 Gwoup Mizik.
2) teknoloji DWDM
Teknoloji a se pi plis ak plis avanse, ak entèval nan longèdonn ap vin pi kout ak pi kout. Lè li rive nan nivo a nan kèk nm, li vin tounen yon WDM kontra enfòmèl ant, ki rele dans divizyon longèdonn miltiplikasyon, ki rele tou souple divize miltiplikasyon, ki se DWDM (dans WDM).
Entèval longèdonn DWDM ka 1.6nm, 0.8nm, 0.4nm, 0.2nm epi li ka akomode 40, 80, 160 vag.
Ranje longèdonn DWDM se 1525nm pou 1565nm (bann C) ak 1570nm pou 1610nm (bann L). DMDM se souvan itilize nan gwoup la C, ak yon entèval longèdonn nan 0.4nm.
4. diferans ant CWDM ak DWDM
1) entèval longèdonn:
CWDM 20nm
DWDM 0.2nm 0.4nm 0.8nm 1.6nm
2) ranje longèdonn:
CWDM 1270nm-1610nm souvan itilize 1470nm-1610nm
DWDM 1525nm-1565nm (C bann) 1570nm-1610nm (L bann) souvan itilize 1525nm-1565nm (C bann) entèval longèdonn 0.4nm
3) Kantite Gwoup Mizik:
CWDM 18
DWDM 40 moso 80 moso 160 moso
4) Diferans aplikasyon:
Nan long distans rezo transmisyon optik, aplikasyon an nan ekipman transmisyon longèdonn longè patikilyèman enpòtan. DWDM longèdonn divizyon ekipman miltiplikasyon ka ranpli travay la transmisyon nan long distans, gwo-kapasite long distans zo rèl do rezo, kèk gwo kapasite metwopoliten zòn nwayo rezo nœuds, telecom 5G, rezo zòn metwopoliten, rezo zo rèl do, ak kèk sant done pral tou aplike teknoloji ak ekipman DWDM. Konpare ak DWDM, pri a nan CWDM yo pral pi ba anpil, sitou yo itilize nan kouch aksè nan rezo a zòn metwopoliten, rezo antrepriz, rezo lakou lekòl la, elatriye teknoloji a CWDM gen yon pakèt aplikasyon pou amelyore achitekti rezo a ki deja egziste, ki anpil ekonomize itilizatè pri pou amelyore rezo a.
lòt pwodwi nou an:
Pwofesyonèl pakè ekipman estasyon radyo FM
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