Monga tonse tikudziwa, ma multimode fiber nthawi zambiri amagawidwa kukhala OM1, OM2, OM3 ndi OM4.Nanga bwanji single mode fiber?M'malo mwake, mitundu ya single mode fiber imawoneka yovuta kwambiri kuposa ulusi wa multimode.Pali magwero awiri ofunikira a single mode optical fiber.Imodzi ndi mndandanda wa ITU-T G.65x, ndipo ina ndi IEC 60793-2-50 (yofalitsidwa monga BS EN 60793-2-50).M'malo motchula mawu onse a ITU-T ndi IEC, ndimangomamatira ku ITU-T G.65x yosavuta m'nkhaniyi.Pali mitundu 19 yosiyana siyana ya single mode Optical fiber yomwe imatanthauzidwa ndi ITU-T.
Mtundu uliwonse uli ndi malo ake ogwiritsira ntchito ndipo kusinthika kwa mawonekedwe a fiber optical uku kumasonyeza kusinthika kwa teknoloji yotumizira mauthenga kuyambira pachiyambi cha kukhazikitsa single mode optical fiber mpaka lero.Kusankha yoyenera pulojekiti yanu kungakhale kofunikira potengera magwiridwe antchito, mtengo, kudalirika komanso chitetezo.Mu positi iyi, ine ndikhoza kufotokoza pang'ono za kusiyana pakati pa ndondomeko ya G.65x mndandanda wa single mode optical fiber mabanja.Ndikuyembekeza kukuthandizani kupanga chisankho choyenera.
G.652
ITU-T G.652 fiber imadziwikanso kuti standard SMF (single mode fiber) ndipo ndi fiber yomwe imagwiritsidwa ntchito kwambiri.Zimabwera m'mitundu inayi (A, B, C, D).A ndi B ali ndi nsonga yamadzi.C ndi D amachotsa nsonga yamadzi kuti igwire ntchito yonse.Ma fiber a G.652.A ndi G.652.B adapangidwa kuti azikhala ndi zero-dispersion wavelength pafupi ndi 1310 nm, motero amakometsedwa kuti agwire ntchito mu gulu la 1310-nm.Atha kugwiranso ntchito mu bandi ya 1550-nm, koma siyikukometsedwa kuderali chifukwa chakubalalika kwakukulu.Ulusi wowonekerawu nthawi zambiri umagwiritsidwa ntchito mkati mwa LAN, MAN ndi makina ofikira pamaneti.Mitundu yaposachedwa kwambiri (G.652.C ndi G.652.D) imakhala ndi madzi ochepa omwe amawathandiza kuti agwiritsidwe ntchito m'dera la wavelength pakati pa 1310 nm ndi 1550 nm zothandizira kufalitsa kwa Coarse Wavelength Division Multiplexed (CWDM).
G.653
G.653 single mode fiber idapangidwa kuti ithetse mkanganowu pakati pa bandiwifi yabwino kwambiri pa utali wa wavelength imodzi ndi kutayika kotsika kwambiri kwina.Imagwiritsa ntchito mawonekedwe ovuta kwambiri m'chigawo chapakati komanso malo ochepa kwambiri, ndipo kutalika kwa zero chromatic kubalalitsidwa kunasunthidwa mpaka 1550 nm kuti igwirizane ndi zotayika zotsika kwambiri mu ulusi.Choncho, G.653 fiber imatchedwanso dispersion-shifted fiber (DSF).G.653 ili ndi kukula kocheperako koyambira, komwe kumakongoletsedwa pamakina akutali amtundu umodzi wotumizira pogwiritsa ntchito ma erbium-doped fiber amplifiers (EDFA).Komabe, kuchuluka kwake kwamphamvu mu fiber pachimake kumatha kubweretsa zotsatira zopanda mzere.Chimodzi mwazovuta kwambiri, kusakaniza kwa mafunde anayi (FWM), kumachitika mu Dense Wavelength Division Multiplexed (CWDM) dongosolo ndi zero chromatic dispersion, kuchititsa crosstalk yosavomerezeka ndi kusokoneza pakati pa njira.
G.654
Mafotokozedwe a G.654 omwe ali ndi mutu wakuti "makhalidwe a chingwe chodulidwa chosinthika cha single mode Optical fiber ndi chingwe."Imagwiritsa ntchito makulidwe okulirapo opangidwa kuchokera ku silica yoyera kuti ikwaniritse ntchito yotalikirapo yofananira ndi kutsika pang'ono mu bandi ya 1550-nm.Nthawi zambiri imakhala ndi kuchuluka kwa chromatic pa 1550 nm, koma sikunapangidwe kuti izigwira ntchito pa 1310 nm konse.CHIKWANGWANI cha G.654 chimatha kuthana ndi milingo yamphamvu yamphamvu pakati pa 1500 nm ndi 1600 nm, yomwe imapangidwira ntchito zotalikirapo zapansi pa nyanja.
G.655
G.655 imadziwika kuti non-zero dispersion-shifted fiber (NZDSF).Ili ndi kachulukidwe kakang'ono, kolamuliridwa kaphatikizidwe ka chromatic mu C-band (1530-1560 nm), komwe ma amplifiers amagwira ntchito bwino, ndipo ali ndi gawo lalikulu lapakati kuposa G.653 fiber.NZDSF fiber imagonjetsa mavuto okhudzana ndi kusakanikirana kwa mafunde anayi ndi zotsatira zina zopanda malire posuntha zero-dispersion wavelength kunja kwa zenera la 1550-nm.Pali mitundu iwiri ya NZDSF, yotchedwa (-D)NZDSF ndi (+D)NZDSF.Iwo motsatana ali ndi mayendedwe oyipa ndi abwino motsutsana ndi kutalika kwa mafunde.Chithunzi chotsatirachi chikuwonetsa momwe zimabalalitsira mitundu inayi ikuluikulu ya single mode fiber.Kubalalika kwa chromatic kwa fiber yogwirizana ndi G.652 ndi 17ps/nm/km.Ma fiber a G.655 ankagwiritsidwa ntchito makamaka kuthandizira machitidwe aatali omwe amagwiritsa ntchito kufalitsa kwa DWDM.
G.656
Komanso ulusi womwe umagwira ntchito bwino pamafunde osiyanasiyana, ena amapangidwa kuti azigwira ntchito bwino pamafunde enaake.Iyi ndi G.656, yomwe imatchedwanso Medium Dispersion Fiber (MDF).Amapangidwa kuti azifikira kwanuko komanso ulusi wautali wautali womwe umachita bwino pa 1460 nm ndi 1625 nm.Mtundu uwu wa fiber unapangidwa kuti uzithandizira machitidwe oyendetsa maulendo ataliatali omwe amagwiritsa ntchito CWDM ndi DWDM kufalitsa pamtundu wotchulidwa wavelength.Ndipo panthawi imodzimodziyo, zimathandiza kuti CWDM ikhale yosavuta kumadera akuluakulu, ndikuwonjezera mphamvu ya fiber mu machitidwe a DWDM.
G.657
G.657 optical fibers amapangidwa kuti azigwirizana ndi ma G.652 optical fibers koma amakhala ndi machitidwe osiyanasiyana a bend sensitivity.Amapangidwa kuti azilola ulusi kuti upinde, osasokoneza magwiridwe antchito.Izi zimatheka kudzera mu ngalande ya kuwala yomwe imawonetsa kuwala komwe kumabwerera mkatikati, m'malo motayika muzitsulo, zomwe zimapangitsa kuti ulusi ukhale wopindika.Monga ife tonse tikudziwa, mu chingwe TV ndi FTTH mafakitale, n'zovuta kulamulira mapindikidwe utali wozungulira m'munda.G.657 ndiye muyeso waposachedwa kwambiri wamapulogalamu a FTTH, ndipo, pamodzi ndi G.652 ndiwomwe amagwiritsidwa ntchito kwambiri pamanetiweki omaliza.
Kuchokera m'ndime yomwe ili pamwambapa, tikudziwa kuti mitundu yosiyanasiyana ya fiber mode imakhala ndi ntchito zosiyanasiyana.Popeza G.657 imagwirizana ndi G.652, okonza mapulani ena ndi oyika nthawi zambiri amakumana nawo.M'malo mwake, G657 ili ndi utali wopindika wokulirapo kuposa G.652, womwe ndi woyenera makamaka pamapulogalamu a FTTH.Ndipo chifukwa cha mavuto a G.643 omwe amagwiritsidwa ntchito mu dongosolo la WDM, tsopano sagwiritsidwa ntchito kawirikawiri, akuchotsedwa ndi G.655.G.654 imagwiritsidwa ntchito kwambiri pamagwiritsidwe apansi pa nyanja.Malinga ndi ndimeyi, ndikukhulupirira kuti mukumvetsetsa bwino za ulusi wamtundu umodziwu, womwe ungakuthandizeni kupanga chisankho choyenera.
Nthawi yotumiza: Sep-03-2021