Kev faib tawm thiab cov yam ntxwv ntawm cov kho qhov muag txaws txaws txaws
Kev ua haujlwm tseem ceeb ntawm OADM yog cais lossis ntxig rau ib lossis ntau lub yoj yoj ib qho los ntawm cov kab ntau sib tshooj. Muaj ob hom, hom teeb meem thiab hom kev rov ua dua tshiab.
Cov hom taag tsuas tuaj yeem tsuas muaj qhov tom ntej lossis ntau dua ntuag sib npaug, thiab kev sib txuas ntawm cov nodes yog txiav txim siab; Nws tsis muaj kev ywj pheej, tab sis kev ua tau zoo txhim khu kev qha, kev ncua qeeb.
Nws yog qhov teeb tsa hnyav tuaj yeem hloov kho qhov sib hloov ntawm qhov yoj ntawm qhov siab ntawm channel thiab nce, uas tuaj yeem paub txog qhov kev hloov kho dua tshiab ntawm cov khoos phis tawm, muaj cov khoom lag luam sib txuas zoo wavelength pab tau tab sis cov qauv nyuaj yuav siv tau los tsim cov array waveguide, optical fiber grating thiab li ntawm ntau hom lim tawm ntawm cov qauv sib txawv ntawm kev kub ceev, kuj tuaj yeem siv tag nrho cov fiber ntau cov tshuab hluav taws xob muaj qhov siab nrawm ntawm tag nrho cov-fiber qauv tsim.
Txawm li cas los xij, cov kev xav tau yooj yim yog tib yam tsis hais txog cov qauv ntawm OADM (qhov poob qis tsis txaus, qhov siab ntawm kev sib cais nruab nrab ntawm cov channel, qhov tsis txaus ntseeg ib puag ncig kev hloov kub thiab polarization, thiab muaj peev xwm zam lub teeb ntab txav thiab tsis txaus siab ntawm cov teeb liab muaj nyob rau hauv qee yam )). OADM yuav tsum muaj peev xwm xyuas kom meej tias lub zog sib kis ntawm cov kwj deg yog yeej zoo ib yam thaum lub sijhawm txheej txheem nce thiab nqis. Kev ua haujlwm ntawm OADM yuav tsum yooj yim, yooj yim thiab ua tiav qib siab / tus nqi ntsuas.
Optical splitter multiplexer yog cov khoom siv sib txuas lus hauv lub network, thiab cov khoom siv sib txuas lus kuj sawv cev rau lub node ntawm lub network. Qee qhov lag luam xa tawm hauv lub network xav tau" tau tawm ntawm" nyob ntawm lub network node thiab nkag mus rau network node rau kev ua tom ntej, thiab qee qhov ncaj qha dhau ntawm cov node network. Tseem muaj cov lag luam hauv cov node sib txuas uas yuav tsum tau" tau ntawm" thiab xa mus rau lub network. Yog li no, txoj haujlwm ntawm optical splitter multiplexer yog cais cov channel uas yuav tsum tau nqis, koom nrog cov channel uas xav tau ntawm txoj kev, thiab cov channel uas tsis muaj dab tsi ua rau nws yuav dhau ncaj qha.
Daim Ntawv Thov ntawm OADM hauv txhua qhov Optical network
Cov khoom siv OADM muaj txiaj ntsig zoo rau ob qho tib si ntev-nrug kev sib tw kab thiab txiv neej.
Hauv cov ntawv thov tseem ceeb, OADM yog cov khoom siv rau cov plhom ib nrab nrog cov haujlwm sab saud thiab qis.
Kev sib ntaus sib tua lub ntsiab ntawm OADM yog METROPOLITAN cheeb tsam Network (WAN), uas muaj peev xwm muab kev ua si tag nrho rau nws qhov kev yooj yim hauv kev sib koom tes, kev txhim kho network yooj yim thiab nthuav dav, ua rau nws zoo tshaj qhov kev pabcuam xa mus rau platform rau METROPOLITAN thaj tsam kev siv network.
Optical divider multiplexer (OADM) tso cai rau cov sib txawv ntawm lub ntsej muag sib txawv ntawm cov sib txawv kho qhov muag kom tau subdivided thiab multiplexed ntawm cov chaw sib txawv. Optical cross-connection (OXC) cov khoom tso cai sib txawv sib txuas ua ke sib zog ua ke thiab faib cov khoom siv yoj hluav taws xob raws li qhov xav tau kom ua tiav ntau cov kev sib txuas rau cov kev sib txuas. Multiplexing multiplex siab lub teeb thiab kho qhov muag hla sib txuas (cov cuab yeej tsuas xav tau rub tawm cov ntaub ntawv rau cov node ua cov khoom siv (suav nrog ATM, SDH hloov thiab IP router), tsis tas yuav coj cov node ua cov ntaub ntawv los ntawm channel teeb los ntawm node, yog li zoo heev txhim kho qhov ua tau zoo ntawm cov nus ua cov ntaub ntawv, coj hluav taws xob ua cov nodes yuav tsum tuaj txog ntawm IP pob ntawv ua rau txhua qhov yuam kev.
Optical Code faib Ntau Txoj Kev Nkag (OCDMA) yog qhov zoo tagnrho txhua qhov khoos phis tawm, uas zam cov" cov khoom hluav taws xob tsis zoo" cov nyhuv ntawm kev sib txuas lus cov khoom siv thiab kev ncua ntev ntawm network raws tu qauv, thiab tuaj yeem paub cov xov xwm kev kub ceev thiab cov ntaub ntawv xa tawm sai sai.
Hauv txhua lub ntsej muag kho qhov muag thoob plaws lub ntsej muag tsim los ntawm OCDMA thev naus laus zis, cov ntaub ntawv nce thiab nqis tuaj yeem nqa tawm ntawm qhov chaw lossis ntawm qhov chaw twg qhov kho qhov muag kab hluav taws xob kis, thiab cov kis tau sib txawv ntawm lwm cov neeg siv ntawm cov kab hluav taws xob optical kab yuav tsis cuam tshuam. Nws hla dhau qhov kev txwv tias cov ntaub ntawv nce thiab nqis tsuas yog tuaj yeem nqa tawm hauv cov nodes hauv lub network qub. Cov txheej txheem kho qhov muag tau nce thiab nqis tuaj yeem nqa tawm thaum twg los tau ntawm ob qho kev sib txuas ntawm kev sib txuas ntawm lub tshuab hluav taws xob lossis kev sib txuas hluav taws xob.
