Advanced Optical Chart - WDM Multiplexer
WDM Multiplexer yog ib lub tshuab uas siv Wavelength Division Multiplexing (WDM) siv tshuab ua ke ntau yam kev pom zoo ntawm wavelengths los ntawm ob los yog ntau tshaj qhov muag fibers rau hauv ib qho fiber ntau xwb. Qhov no sib txuas los yog kev sib koom tes ntawm lub wavelengths yuav ua tau zoo heev rau qhov ua kom cov kab txuas ntau ntawm cov kab mob fiber ntau. WDM multiplexers siv ob khub: ib qho thaum pib ntawm lub fibre kom ob peb lub inputs thiab ib qho kawg ntawm lub fiber kom decouple thiab ces lawv cov wavelengths cais mus rau nyias fibers. Ib qho WDM multiplexer tuaj yeem xav txog ntawm txoj kev loj hauv txoj kev loj; txoj kev loj yuav tuaj yeem pab txhawb nqa txoj kev loj heev, yog li ua kom muaj peev xwm ua tau.
Txhua cov channel hauv WDM multiplexer yog tsim los rau kev sib tshuam txog kev kho qhov muaj qhov yoojyim. Tus multiplexer ua haujlwm zoo ib yam li tus coupler thaum pib ntawm cov tshuab fiber ntau thiab ua ib lim nyob rau ntawm qhov kawg ntawm cov tshuab fiber ntau. Piv txwv li, ib tug 8-channel multiplexer yuav muaj peev xwm los sib sau yim sib txawv los yog kev hloov ntawm nyias qhov muag fibers rau ib qho fiber ntau qhov muag. Ntxiv dua thiab, kom zoo dua ntawm qhov loj tshaj bandwidth qhov kawg ntawm cov khoom siv fib tshuab, lwm tus multiplexer (demultiplexer) yuav rov qab tau cov wavelengths cais. Daim duab hauv qab no qhia tau yooj yim WDM tsim los ntawm ntau lub teeb ci, WDM multiplexer los yog txuas nrog cov keyboards rau qhov sib txuas ntawm fiber ntau, thiab WDM demultiplexer lossis optical splitter uas cais lub wavelengths rau lawv cov receivers.
Hom WDM Multiplexers
CWDM & DWDM Multiplexers
WDM multiplexers muaj nyob rau ntau qhov ntau thiab tsawg, tab sis feem ntau yuav pom muaj 2, 4, 8, 16, 32, thiab 64 raws qhov teeb meem. Cov hom multiplexers yog wideband (lossis crossband), nqaim hlua, thiab ntom. Wideband los yog crossband multiplexers ( CWDM Multiplexer ) yog cov cuab yeej ua ke uas muab ntau yam ntawm wavelengths, xws li 1310 nm thiab 1550 nm. Tus neeg siv tshuab luam yeeb narrowband yuav muab ntau lub suab sib txuas nrog 1000 GHz channel. Ib tug tuab multiplexer combines wavelengths nrog 100 GHz channel yov. Ntawm no qhia tau hais tias yog ib qho yooj yim rau cov kev pab cuam WDM.
Kev sib tshuam ntawm Wrowle WDM (DWDM) muaj raws 1000 nro 1000 GHz, los yog kwv yees li 8 nm, sib nrug. Ntawm no yog ib daim duab uas qhia tau hais tias muaj cov kab ke WDM yooj yim.
Kev lag luam tus qauv ntawm Kev Sib Thoob Ntiaj Teb Multiplexing Multiplexing Multiplexers ( DWDM Multiplexer ), raws li kev pom zoo los ntawm International Telecommunications Union (ITU), yog 100 GHz los yog kwv yees li 0.8 nm channel. Muaj C-Band, S-band, thiab L-band DWDM multiplexers. C-Band yog 1550 nm band uas siv wavelengths los ntawm 1530 mus rau 1565 nm. S-band siv wavelengths los ntawm 1525 mus rau 1538 nm, thiab L-band siv wavelengths ntawm 1570 mus rau 1610 nm.
Qhov ze ze ntawm cov dej muaj nyob ua ke, ntau dua qhov uas muaj peev xwm nkag mus rau hauv ib pawg. Tam sim no muaj kev sib tw ntawm 50 GHz (muaj 50 GHz DWDM multiplexers feem ntau muaj 64, 80, 88, 96 raws). Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias raws li txoj kev sib kis los yog qhov dav ntawm txhua txoj kev txo kev lag luam, qhov loj dua qhov dav spectral tiav. Qhov no yog qhov tseem ceeb vim tias lub wavelength yuav tsum muaj qhov ruaj khov los sis ntev ntev tsis txaus los mus ua txoj kab dej uas nyob ib sab. Dhau li muaj qhov dav dav spectral ntau heev, lub laser transmitter tsis tuaj yeem txav deb (nws yuav tsum tawm ntawm tib lub sij hawm wavelength txhua lub sijhawm). Yog hais tias lub laser transmitter cov zis wavelength hloov txawm ob peb lub kaum ntawm ib lub nanometer, nws yuav hloov mus rau lwm cov channel thiab ua teeb meem cuam tshuam.
Unidirectional & Bidirectional WDM Multiplexers
Muaj ntau qhov sib txawv ntawm WDM multiplexers. Txhua yam peb tau them rau qhov point no piav qhia txog kev ua haujlwm WDM. Tus Unidirectional WDM Multiplexer yog teeb tsa kom tus multiplexer txuas mus rau optical transmitters los yog receivers. Nyob rau hauv lwm yam lus, nws tso cai rau lub teeb mus nyob rau hauv ib qho kev qhia xwb thiab tsuas yog kev sib txuas lus yooj yim dua ib zaug xwb qhov muag fiber ntau. Yog li ntawd, cov kev sib txuas lus puv npo yuav tsum muaj ob daim phiaj siv fais fab.
Tus WDM multiplexer uas tsim los txuas nrog ob lub transmitters thiab receivers hu ua bidirectional (BiDi); nyob rau hauv essence, BiDi WDM Multiplexer yog tsim los kho qhov muag kis tau zoo hauv ob qho tib si qhia siv ib qho fiber ntau xwb. Ob tog yuav txhawb ib txoj kab txuas kev sib txuas tag nrho. Ntawm no yog ib daim duab uas qhia tau hais tias ob BiDi WDM multiplexers sib txuas lus dua ib zaug xwb qhov muag fiber ntau.
Cov lus qhia siv WDM Multiplexers
Raws li nrog rau lwm yam khoom siv uas tau muab ntxiv rau lub network fibre optic, muaj ntau yam tseem ceeb uas yuav tsum tau lees paub. Vim tias qhov kev poob qis yog qhov tseem ceeb tshaj uas yuav tsum tau muab coj los rau hauv koj tus account, koj yuav tsum nco ntsoov tias ntau dua cov kev khiav haujlwm, qhov ntau dua qhov raug poob thaum siv WDM multiplexers. Lwm cov lus qhia kom nco ntsoov thaum siv WDM multiplexers yog cais, PMD, thiab bandwidth spectral.
Lus xaus
WDM multiplexers tau siv cov khoom siv dav dav uas yog siv ib txoj kev los siv cov peev txheej ntawm cov khoom siv fiber ntau uas tsis siv cov nuj nqis siv cov laser transmitters thiab receivers ceev tshaj plaws. Cia li xav txog nws: ib qho 8-channel WDM system siv ncaj qha modulated 2.5 Gbps laser transmitters yog ob zaug ua ntau cov ntaub ntawv raws li ib zaug kiag li modulated 10 Gbps laser transmitter. WDM tshuab pub cov neeg tsim qauv los ua ke coj kev ua haujlwm thiab ua kom muaj kev ua haujlwm zoo. WDM tshuab xa cov feem ntau bang rau phaw!