Kamar yadda muka sani, tun daga 1990s, ana amfani da fasahar WDM WDM don hanyoyin haɗin fiber-optic mai tsayi na ɗaruruwa ko ma dubban kilomita. Ga mafi yawan yankuna na ƙasar, kayan aikin fiber shine mafi kyawun kadari, yayin da farashin kayan aikin transceiver yayi ƙasa da ƙasa.
Koyaya, tare da fashewar ƙimar bayanai a cikin hanyoyin sadarwa kamar 5G, fasahar WDM tana ƙara zama mai mahimmanci a cikin gajerun hanyoyin haɗin kai kuma, waɗanda aka tura a cikin ƙira mafi girma kuma saboda haka sun fi kula da farashi da girman tarurruka masu wucewa.
A halin yanzu, waɗannan cibiyoyin sadarwa har yanzu suna dogara ga dubunnan filaye na gani guda ɗaya waɗanda ake watsa su a layi daya ta hanyar tashoshi na rarraba sararin samaniya, tare da ƙarancin ƙimar bayanai na aƙalla 'yan ɗari Gbit/s (800G) a kowane tashoshi, tare da ƙaramin adadin yuwuwar. aikace-aikace a cikin T-class.
Koyaya, a nan gaba mai zuwa, manufar daidaitawar wuri gama gari nan ba da jimawa ba za ta isa iyakar girmanta, kuma dole ne a haɗa ta ta hanyar daidaita magudanan bayanai a cikin kowane fiber don ci gaba da haɓaka ƙimar bayanai. Wannan na iya buɗe sabon sararin aikace-aikacen don fasahar WDM, wanda mafi girman ƙima dangane da adadin tashoshi da ƙimar bayanai yana da mahimmanci.
A cikin wannan mahallin,na'ura mai ba da hanya tsakanin hanyoyin sadarwa (FCG)yana taka muhimmiyar rawa a matsayin madaidaicin, kafaffen, tushen haske mai tsayi da yawa wanda zai iya samar da adadi mai yawa na masu ɗaukar hoto masu kyau. Bugu da kari, wani muhimmin fa'ida ta musamman na combs na mitar gani shine cewa layin tsefe suna da daidaito daidai gwargwado a cikin mitar, don haka shakatawa da buƙatu don ƙungiyoyin tsaro na tashoshi da kuma guje wa sarrafa mitar da ake buƙata don layi ɗaya a cikin tsarin al'ada ta amfani da. DFB lasers.
Yana da mahimmanci a lura cewa waɗannan fa'idodin sun shafi ba kawai ga masu watsa WDM ba har ma ga masu karɓar su, inda za a iya maye gurbin tsararrun oscillator na gida (LO) da janareta guda ɗaya. Yin amfani da janareta na LO comb yana ƙara sauƙaƙe sarrafa siginar dijital don tashoshi na WDM, don haka rage rikiɗar mai karɓa da haɓaka juriya na lokaci.
Bugu da kari, yin amfani da siginonin tsefe na LO tare da kulle lokaci don daidaitaccen liyafar madaidaici har ma yana ba da damar sake gina siginar yanki na lokaci-lokaci na siginar WDM gabaɗaya, don haka rama lahani da ke haifar da rashin daidaituwa na gani a cikin fiber watsawa. Bugu da ƙari ga waɗannan fa'idodin ra'ayi na watsa siginar tushen tsefe, ƙaramin girman da samar da taro mai inganci shima maɓalli ne ga masu karɓar WDM na gaba.
Don haka, a cikin dabaru daban-daban na janareta na siginar tsefe, na'urorin sikelin guntu suna da sha'awa ta musamman. Lokacin da aka haɗe su da da'irorin haɗaɗɗun ma'auni na photonic don daidaita siginar bayanai, multixing, kewayawa da liyafar, irin waɗannan na'urori na iya ɗaukar maɓalli don ƙaƙƙarfan, ingantattun na'urorin WDM waɗanda za'a iya ƙirƙira su da yawa akan farashi mai sauƙi, tare da ikon watsawa har zuwa dubun. na Tbit/s da fiber.
Hoton da ke gaba yana kwatanta ƙirar mai watsa WDM ta amfani da mitar gani comb FCG a matsayin tushen haske mai tsayi da yawa. An fara raba siginar combin FCG a cikin na'urar demultiplexer (DEMUX) sannan ya shiga cikin na'ura mai sarrafa lantarki ta EOM. Ta hanyar, ana yin siginar zuwa ga ci gaba na QAM quadrature amplitude modulation don ingantaccen yanayin gani (SE).
A lokacin watsawa, ana sake haɗa tashoshi a cikin multixer (MUX) kuma ana watsa siginar WDM akan fiber yanayin guda ɗaya. A ƙarshen karɓa, mai karɓar maɓalli mai yawa (WDM Rx), yana amfani da oscillator na gida na LO na 2nd FCG don gano madaidaicin tsayin wavelength. Tashoshin shigar da siginar WDM an raba su ta hanyar demultiplexer kuma an ciyar da su zuwa tsararrun mai karɓa (Coh. Rx). Inda ake amfani da mitar demultiplexing na gida oscillator LO azaman ma'anar lokaci don kowane mai karɓa mai daidaituwa. Ayyukan irin waɗannan hanyoyin haɗin WDM a bayyane ya dogara da yawa akan janareta na siginar tsefe, musamman faɗin layin gani da ƙarfin gani a kowane layin tsefe.
Tabbas, fasahar tsefe ta mitar gani har yanzu tana kan matakin haɓakawa, kuma yanayin aikace-aikacenta da girman kasuwa kaɗan ne. Idan zai iya shawo kan matsalolin fasaha, rage farashi da inganta dogara, to, zai yiwu a cimma matakan matakan aikace-aikace a cikin watsawar gani.
Lokacin aikawa: Nuwamba-21-2024