Ubwoko bumwe bwa fibre (SingleModeFibre) ni fibre optique ishobora kohereza gusa uburyo bumwe kumurongo wihariye. Ikirahuri hagati yikirahure ni gito cyane (diameter yibanze ni 9 cyangwa 10 mm).
Kubwibyo rero, uburyo bwacyo bwo gutandukanya ni buto cyane, bubereye itumanaho rya kure Ariko, hariho no gutatanya ibintu hamwe no gukwirakwiza umurongo wa waveguide, kuburyo fibre imwe-imwe ifite ibisabwa byinshi hejuru yubugari bwikigereranyo no guhagarara kwumucyo, ni ukuvuga, ubugari bwikigereranyo bugomba kuba bugufi kandi ituze ni ryiza.
Nyuma, byagaragaye ko kuri 1.31μm z'uburebure, gukwirakwiza ibintu kwa fibre optique ya fibre imwe hamwe no gukwirakwiza umurongo wa waveguide nibyiza kandi bibi, kandi ubunini burasa neza. Muri ubu buryo, akarere ka 1.31μm k'uburebure bwahindutse idirishya ryiza ryogukoresha itumanaho rya fibre optique, kandi ubu niryo tsinda rikuru ryimikorere ya sisitemu yo gutumanaho ya fibre optique. Ibipimo nyamukuru bya 1.31μm isanzwe ya fibre imwe isanzwe irasabwa nubumwe mpuzamahanga bwitumanaho ITU-T muri G652 Bamwe, iyi fibre nayo yitwa fibre G652. Fibre yuburyo bumwe irashobora kugabanywamo 652 fibre imwe imwe, 653 fibre imwe na 655 fibre imwe.
Ibisobanuro bya "fibre imwe-fibre" mubitabo byamasomo: mubisanzwe, iyo v iri munsi ya 2.405, impinga imwe gusa muri fibre irarengana, bityo yitwa fibre imwe. Intangiriro yacyo ni nto cyane, hafi micron 8-10, kandi uburyo bwo gutatanya ni buto cyane. Ikintu nyamukuru kigira ingaruka mubugari bwikwirakwizwa rya fibre ni ugutandukana gutandukanye, kandi uburyo bwo gukwirakwiza nuburyo bwingenzi. Ikwirakwizwa rya fibre imwe-fibre ni ntoya, irashobora rero kohereza urumuri mumurongo mugari wa intera ndende.
Fibre imwe-fibre ifite diameter yibanze ya micron 10, ituma uburyo bumwe bwogukwirakwiza urumuri, bushobora kugabanya umurongo wa interineti na Modal Dispersion. Nyamara, kubera ko diameter imwe ya fibre yibanze ya diameter ari nto cyane, biragoye kugenzura ihererekanyabubasha, bityo rero birakenewe ko lazeri zihenze zikoreshwa nkisoko yumucyo, kandi imbogamizi nyamukuru yinsinga imwe ya optique ni ugukwirakwiza ibintu. . Imiyoboro imwe ya optique ikoresha cyane cyane laseri kugirango ibone umurongo mwinshi. Kubera ko LED izasohora umubare munini wumucyo ufite umurongo mugari, ibisabwa byo gukwirakwiza ibintu ni ngombwa cyane. Fibre imwe-imwe irashobora gushyigikira intera ndende kuruta fibre-moderi nyinshi. Muri 100Mbps ya Ethernet cyangwa 1G ya Gigabit, fibre imwe-imwe irashobora gushyigikira intera irenze 5000m uhereye kubiciro. Urebye ibiciro, kubera ko optique ya optique ihenze cyane, ikiguzi cyo gukoresha fibre optique ya fibre imwe izaba irenze ikiguzi cya fibre optique ya fibre optique.
Ikwirakwizwa ryimyanya ndangagitsina isa na fibre optique itunguranye, diameter yibanze ni 8 ~ 10 mm gusa, kandi urumuri rukwirakwira muburyo bugororotse kumurongo wibanze. Kuberako iyi fibre ishobora kwanduza uburyo bumwe gusa (leta zombi zihindagurika), byitwa fibre imwe-fibre kandi kugoreka ibimenyetso kwayo ni bito cyane.