Single-mode fiber (SingleModeFiber) is optical fiber iyo inogona chete kufambisa imwe modhi pane yakatarwa wavelength. Iyo yepakati girazi musimboti yakatetepa kwazvo (musimboti dhayamita kazhinji 9 kana 10μm).
Nokudaro, kupararira kwayo kwe-inter-mode kuduku zvikuru, kwakakodzera kutaurirana kure Zvisinei, kunewo kupararira kwezvinhu uye kupararira kwewaveguide, kuitira kuti imwe-mode fiber ine zvidikanwi zvepamusoro pahupamhi hwekutaridzika uye kugadzikana kwechiedza chechiedza, kureva, iyo spectral width inofanira kuva yakamanikana uye kugadzikana kuri nani.
Gare gare, zvakaonekwa kuti pa 1.31μm wavelength, kupararira kwezvinhu zve single-mode optical fiber uye waveguide dispersion yakanaka uye yakaipa, uye ukuru hwakafanana. Neiyi nzira, iyo 1.31μm wavelength dunhu rave rakanakira kushanda hwindo re optical fiber kutaurirana, uye ikozvino ndiro bhendi guru rekushanda reanoshanda optical fiber kutaurirana masisitimu. Iwo maparamendi makuru e1.31μm akajairwa single-mode fiber anokurudzirwa neInternational Telecommunication Union ITU-T muG652 Certain, saka iyi fiber inonzi zvakare G652 fiber. Single-mode fiber inogona kukamurwa kuita 652 single-mode fiber, 653 single-mode fiber uye 655 single-mode fiber.
Tsananguro ye "single-mode fiber" mumabhuku ezvidzidzo: kazhinji, kana v isingasviki 2.405, imwe chete yepamusoro mufiber inopfuura, saka inodaidzwa kuti single-mode fiber. Musimboti wayo wakatetepa kwazvo, anenge 8-10 microns, uye iyo mode dispersion idiki. Chinhu chikuru chinokanganisa hupamhi hwebhandi yekufambisa bhendi ndeyekupararira kwakasiyana, uye nzira yekuparadzira ndiyo inonyanya kukosha. Kupararira kwe-single-mode fiber idiki, saka inokwanisa kufambisa mwenje mune yakakura frequency bhendi kwechinhambwe chakareba.
Iyo single-mode fiber ine dhayamita yepakati yegumi micron, iyo inobvumira imwe-mode danda kutapurirana, iyo inogona kuderedza bandwidth uye Modal Dispersion. Nekudaro, nekuti iyo single-modhi faibha musimboti dhayamita idiki zvakanyanya, zvinonetsa kudzora kutapurirana kwedanda, saka zvinodikanwa kuti Inodhura lasers ishandiswe semwenje sosi, uye iyo huru yekumisikidza ye single-mode Optical tambo kuparadzirwa kwezvinhu. . Single-mode Optical cables anonyanya kushandisa lasers kuwana yakakwirira-frequency bandwidth. Sezvo ma LED achizoburitsa huwandu hukuru hwemwenje masosi ane akasiyana bandwidths, zvinhu zvekuparadzira zvinodiwa zvakakosha zvakanyanya. Single-modhi faibha inogona kutsigira kureba kutapurirana chinhambwe pane akawanda-modhi faibha. Mune 100Mbps Ethernet kana 1G Gigabit network, single-mode fiber inogona kutsigira kutapurirana kureba kunodarika 5000m kubva pamutengo wekuona. Kubva pakuona kwemutengo, sezvo transceiver optical inodhura zvikuru, mari yekushandisa single-mode optical fiber ichave yakakwirira kudarika mari ye-multi-mode optical fiber cable.
Iyo refractive index kugoverwa kwakafanana neiyo abrupt optical fiber, iyo dhayamita yepakati ingori 8 ~ 10μm, uye mwenje unopararira mumutsara chimiro pamwe nepakati axis. Nekuti iyi fiber inogona kungo fambisa imwe modhi (iyo mbiri polarization nyika yadzikira), inonzi imwe-modhi faibha uye kukanganiswa kwayo kwechiratidzo kudiki kwazvo.