1.piav qhiakev
Lub wavelength division multiplexer siv qhov qis qis qis ntawm cov khoom siv kho qhov muag los ua ke lub teeb ntawm cov wavelengths sib txawv ntawm ib qho fiber ntau rau kev sib kis los ntawm wavelength division multiplexer. Lub yoj lim cais cov multiplexing hom ntawm cov teeb liab sib txawv ntawm cov teeb liab sib txawv.
Lub wavelength division multiplexer yogoptical passive ntaus ntawvuas cais thiab sib txuas cov wavelengths ntawm lub teeb nthwv dej. Hauv kev ua haujlwm ntawm kev sib txuas lus fiber ntau ceev, kev sib txuas lus, thiab txhua qhov kev sib txuas lus kho qhov muag, cov kev pab cuam kho qhov muag fiber ntau muaj qhov kev thov dav dav. Nyob rau tib lub sijhawm, qhov kho qhov muag fiber ntau thiab kho qhov muag cable dynamic mob saib xyuas hauv lub network fiber ntau yuav tsum siv wdm thev naus laus zis. Ib qhov chaw nres nkoj ntawm lub wavelength division multiplexing ntaus ntawv yog siv los ua qhov tso zis / tawm tswv yim kawg ntawm lub cuab yeej; N cov chaw nres nkoj yog siv los ua qhov kev tawm tswv yim / tso tawm kawg ntawm lub cuab yeej.
Thaum lub wavelength division multiplexer ntaus ntawv yog siv raws li ib tugdemultiplexer, ntau yam teeb liab nthwv dej tau txhaj rau hauv qhov xwm txheej kawg (ib qho chaw nres nkoj) raug xa mus rau qhov sib txuas ntawm qhov kawg (ib qho ntawm N chaw nres nkoj) raws li lub wavelength. Rau qhov sib txawv ua hauj lwm wavelengths, nws cov zis ports txawv. Thaum lub teeb liab kho qhov muag ntawm ib qho kev khiav hauj lwm wavelength yog kis tau los ntawm cov tswv yim ib qho chaw nres nkoj mus rau qhov chaw tso zis sib xws, lub wavelength division multiplexer ntaus ntawv muaj qhov poob qis tshaj plaws. Lwm qhov tso zis ports muaj kev sib cais zoo tshaj plaws los ntawm cov teeb liab input optical.
Thaum lub cuab yeej siv los ua multiplexer, cov nyhuv yog thim rov qab los ntawm qhov tau piav qhia saum toj no. Thaum lub teeb liab kho qhov muag ntawm ib qho kev ua haujlwm wavelength raug xa tawm los ntawm qhov sib txuas cov tswv yim chaw nres nkoj (ib qho ntawm N chaw nres nkoj) mus rau ib qho chaw nres nkoj, nws muaj qhov poob qis tshaj plaws, thiab lwm qhov chaw tawm tswv yim muaj kev sib cais ntawm lub teeb pom kev zoo.
WDM wavelength division multiplexer yog hais txog lub kaw lus uas tuaj yeem xa ntau lub wavelengths hauv ib lub fiber ntau optical, thiab hloov ib qho fiber ntau rau hauv ntau lub teeb liab thiab decomposes lawv. WDM feem ntau muaj peb txoj kev sib txawv, xws li wavelength division multiplexing ntawm 1310nm thiab 1550nm wavelengths, coarse wavelength division multiplexing (CWDM) thiab ntom wavelength division multiplexing (DWDM).
