Peb paub tiasDWDMthev naus laus zis tuaj yeem xa tawm ntau lub wavelengths nyob rau hauv ib lub fiber ntau, uas zoo heev nthuav kev sib txuas lus ntawm optical fiber kev sib txuas lus system. Qhov ntxov tshaj plawsMUX/DEMUXmodule hauvDWDM systemyog raws li dielectric membrane lim TFF. Ob leeg ntawm no yog cov qauv sib txawv, nrog cov wavelengths sib txawv uas muaj cov lej sib txawv ntawm cov khoom siv hauv lub module, ua rau muaj kev sib txawv ntawm lub zog. Raws li tus naj npawb ntawm cov chaw nres nkoj nce, qhov poob uniformity ntawm DWDM modules deteriorates. Nyob rau tib lub sijhawm, qhov poob siab tshaj plaws ntawm qhov kawg ntawm qhov chaw nres nkoj yog lwm yam uas txwv cov naj npawb ntawm cov chaw nres nkoj. Yog li, tus lej channel ntawm DWDM module raws li TFF thev naus laus zis feem ntau tsis ntau tshaj 16.
Txawm li cas los xij, ib qho kev sib raug zoo DWDM feem ntau xa 40 lossis 48 wavelengths hauv ib lub fiber ntau, yog li xav tau ntau qhov chaw nres nkoj MUX / DEMUX. Ib tug series WDM module yuav sau ntau dhau lub zog poob hauv cov chaw nres nkoj tom qab, yog li nws yuav tsum tau txais ib qho qauv sib txuas rau MUX / DEMUX kaum ntawm wavelengths ib zaug. Array waveguide gratingAWGyog ib yam khoom siv kho qhov muag.
Array waveguide gratings feem ntau yog siv hauv Optical Multiplexers (DE) ntawm WDM systems. Cov khoom siv no tuaj yeem sib txuas lub teeb ntawm ntau lub wavelengths rau hauv ib qho fiber ntau los txhim kho kev nthuav dav ntawm Optical fiber networks.
Structure of AWG
Ib qho qauv AWG ib txwm muaj xws li cov tswv yim waveguide, lub hnub qub input coupler (dawb kis tau tus mob cheeb tsam FPR), thiab ib tug array ntawm waveguides, ib tug tso zis hnub qub coupler, thiab ntau ntau cov zis waveguides. Qhov ntev ntawm lub waveguide array yog nyob rau hauv ib tug lej lej. Qhov ntev ntawm thawj waveguide yog L0, thiab qhov ntev ntawm kuv waveguide yog Li. Lub teeb liab DWDM nkag mus rau lub hnub qub input coupler los ntawm cov tswv yim waveguide thiab muab faib rau waveguide array tom qab xa dawb. Cov txheej txheem ua haujlwm yog wavelength ywj siab thiab tag nrho cov wavelengths raug xa mus rau array waveguide indiscriminately. Array waveguide ua rau theem sib txawv rau ntau cov kab teeb, thiab cov theem ntawm txhua kab teeb yog nyob rau hauv ib tug lej lej, uas zoo ib yam li cov xwm txheej hauv cov tsoos grating. Qhov sib txawv wavelengths yog dispersed thiab tsom rau ntawm qhov chaw sib txawv nyob rau hauv cov zis lub hnub qub coupler. Qhov sib txawv wavelengths tau txais los ntawm cov waveguide sib txawv, yog li thaum uas tig mus DEMUX ntawm DWDM cov cim qhia tau paub.
Array waveguide grating (AWG) yog ib qho tseem ceeb ntawmDWDM networksuas tab tom loj hlob sai. AWG tuaj yeem tau txais ntau lub wavelengths thiab channels, paub qhov multiplexing thiab DEMUX ntawm kaum mus rau pua pua ntawm wavelengths, thiab tuaj yeem hloov kho cov khoom siv ntau yam thiab cov khoom siv nrog lwm cov khoom siv kho qhov muag. Kev ruaj ntseg siab thiab kev ua haujlwm zoo heev kuj yog ib qho laj thawj vim li casAWGyog qhov nyiam siv tshuab rau DWDM.
