Fiber-yanayin-Single (SingleModeFiber) fiber na gani ne wanda ke iya watsa yanayin guda ɗaya kawai a ƙayyadadden tsayin tsayi. Gilashin tsakiya yana da bakin ciki sosai (diamita na tsakiya shine 9 ko 10μm).
Saboda haka, da inter-mode watsawa ne sosai kananan, dace da m sadarwa Duk da haka, akwai kuma abu watsawa da waveguide watsawa, sabõda haka, guda-mode fiber yana da mafi girma bukatun a kan bakan nisa da kwanciyar hankali na haske Madogararsa, wato. Nisa mai ban mamaki ya kamata ya zama kunkuntar kuma kwanciyar hankali ya fi kyau.
Daga baya, an gano cewa a 1.31μm wavelength, da kayan watsawa na guda-yanayin Tantancewar fiber da waveguide watsawa ne tabbatacce kuma korau, da kuma girma ne daidai guda. Ta wannan hanyar, yanki mai tsayi na 1.31μm ya zama kyakkyawan taga aiki don sadarwar fiber na gani, kuma yanzu shine babban rukunin aiki na tsarin sadarwar fiber na gani mai amfani. Babban sigogi na 1.31μm na al'ada guda-yanayin fiber na al'ada guda ɗaya ana ba da shawarar ta Ƙungiyar Sadarwar Sadarwa ta Duniya ITU-T a cikin G652 Wasu, don haka ana kiran wannan fiber G652 fiber. Za a iya raba fiber-mode fiber zuwa 652 fiber-mode fiber, 653 fiber-mode fiber da 655 fiber-mode fiber.
Bayanin "fiber-mode-single" a cikin wallafe-wallafen ilimi: gabaɗaya, lokacin da v ya kasance ƙasa da 2.405, kololuwa ɗaya kawai a cikin fiber ɗin ya wuce, don haka ana kiran shi fiber-mode guda ɗaya. Jigon sa yana da bakin ciki sosai, kusan 8-10 microns, kuma yanayin tarwatsawa yana da kankanta. Babban abin da ke shafar nisa na fiber watsa band ne daban-daban dispersions, da kuma yanayin watsawa ne mafi muhimmanci. Watsewar fiber-mode guda ɗaya ƙananan ne, don haka yana iya watsa haske a cikin maɗaurin mitar mai faɗi na nesa mai nisa.
Fiber-mode fiber yana da mahimmancin diamita na 10 micron, wanda ke ba da damar watsa igiyoyi guda ɗaya, wanda zai iya rage bandwidth da Watsawa Modal. Duk da haka, saboda guda-mode fiber core diamita ne ma kananan, yana da wuya a sarrafa katako watsa, don haka wajibi ne a yi amfani da tsada Laser a matsayin haske tushen, da kuma babban iyakance guda-mode Tantancewar igiyoyi ne kayan watsawa. . Kebul na gani guda ɗaya suna amfani da lasers don samun babban adadin bandwidth. Tun da LEDs za su fitar da adadin haske mai yawa tare da bandwidth daban-daban, buƙatun watsawa na kayan suna da mahimmanci. Single-yanayin fiber iya goyi bayan dogon watsa nisa fiye da Multi-yanayin fiber. A cikin 100Mbps Ethernet ko 1G Gigabit cibiyar sadarwa, fiber-mode fiber na iya tallafawa nisan watsawa fiye da 5000m daga hangen farashi. Daga hangen nesa na farashi, tun da transceiver na gani yana da tsada sosai, farashin yin amfani da fiber na gani guda ɗaya zai zama mafi girma fiye da farashin na USB na fiber na gani mai yawa.
Rarraba index mai jujjuyawa yayi kama da fiber na gani ba zato ba tsammani, ainihin diamita shine kawai 8 ~ 10μm, kuma hasken yana yaduwa a cikin siffa mai linzami tare da axis. Domin wannan fiber na iya watsa yanayin guda ɗaya kawai (jihohin polarization guda biyu sun lalace), ana kiranta fiber-mode fiber kuma karkatar da siginar sa kadan ne.