Ifiber yemowudi enye (SingleModeFiber) yifiber optical enokuhambisa imowudi enye kuphela kubude obuxeliweyo. Undoqo weglasi ubhityile kakhulu (undoqo wedayamitha yi-9 okanye 10μm).
Ngoko ke, i-inter-mode dispersion yayo incinci kakhulu, ilungele unxibelelwano olukude Nangona kunjalo, kukho ukusabalalisa kwezinto kunye ne-waveguide dispersion, ukwenzela ukuba i-fiber ye-mode enye ineemfuno eziphezulu kububanzi be-spectral kunye nokuzinza komthombo wokukhanya, oko kukuthi, ububanzi be-spectral kufuneka bube buncinci kwaye uzinzo lungcono.
Kamva, kwafunyaniswa ukuba kwi-1.31μm ubude be-wavelength, ukuchithwa kwezinto kwi-fiber optical ye-single-mode kunye ne-waveguide dispersion ilungile kwaye imbi, kwaye ubukhulu bufana ncakasana. Ngale ndlela, ummandla we-wavelength we-1.31μm uye waba yifestile efanelekileyo yokusebenza kunxibelelwano lwefiber optical, kwaye ngoku yeyona nto iphambili yokusebenza kweenkqubo zonxibelelwano lwefiber optical. Iiparamitha eziphambili ze-1.31μm ze-fiber ye-mode eyodwa zinconywa yi-International Telecommunication Union ITU-T kwi-G652 ethile, ngoko ke le fiber ibizwa ngokuba yi-G652 fiber. I-fiber ye-single-mode inokwahlulwa ibe yi-652 ye-fiber ye-single-mode, i-653 i-fiber ye-single-mode kunye ne-655 i-fiber-mode eyodwa.
Inkcazo ye "fiber-mode-mode" kwiincwadi zezemfundo: ngokuqhelekileyo, xa i-v ingaphantsi kwe-2.405, i-fiber enye kuphela idlula i-fiber, ngoko ibizwa ngokuba yi-fiber mode-mode. Undoqo wayo ubhityile kakhulu, malunga ne-8-10 microns, kwaye imowudi yokusasazwa iNcinci kakhulu. Eyona nto iphambili echaphazela ububanzi bebhendi yokuhanjiswa kwefayibha zii-dispersions ezahlukeneyo, kwaye ukusasazwa kwemowudi yeyona nto ibalulekileyo. Ukusasazwa kwefiber yemowudi enye incinci, ngoko inokuhambisa ukukhanya kwibhendi ebanzi yomgama omde.
I-fiber-mode-mode ine-core diameter ye-micron eyi-10, evumela ukuhanjiswa kwe-beam ye-mode enye, enokunciphisa i-bandwidth kunye ne-Modal Dispersion. Nangona kunjalo, ngenxa yokuba i-fiber-mode core diameter incinci kakhulu, kunzima ukulawula ukuhanjiswa komqadi, ke kuyafuneka ukuba iiLaser ezixabisa kakhulu zisetyenziswe njengomthombo wokukhanya, kwaye umda ophambili wendlela enye yeentambo zokukhanya kukusasazwa kwezinto. . Iintambo zamehlo ezikwimowudi enye ikakhulu zisebenzisa iilaser ukufumana i-high-frequency bandwidth. Ekubeni ii-LED ziya kukhupha inani elikhulu lemithombo yokukhanya kunye ne-bandwidths eyahlukeneyo, iimfuno zokusasazeka kwezinto zibaluleke kakhulu. Ifayibha yemowudi enye inokuxhasa umgama omde wothumelo kunefiber yeendlela ezininzi. Kwi-100Mbps ye-Ethernet okanye i-1G yenethiwekhi ye-Gigabit, i-fiber ye-mode eyodwa inokuxhasa umgama wokuhanjiswa ongaphezu kwe-5000m ukusuka kumbono weendleko. Ukususela kumbono weendleko, ekubeni i-transceiver optical ibiza kakhulu, iindleko zokusebenzisa i-fiber optical mode enye iya kuba phezulu kuneendleko ze-multi-mode optical fiber cable.
Isalathiso sesalathiso se-refractive sifana ne-fiber optical abrupt, i-core diameter yi-8 ~ 10μm kuphela, kwaye ukukhanya kusasazeka kwimilo yomgca ecaleni kwe-axis engundoqo. Ngenxa yokuba le fiber inokuhambisa imo enye kuphela (iimeko ezimbini ze-polarization ziyancipha), ibizwa ngokuba yi-fiber yemowudi enye kwaye ukuphazamiseka kwayo kuncinci kakhulu.