Kamar yadda muka sani, multimode fiber yawanci ana raba shi zuwa OM1, OM2, OM3 da OM4.To yaya game da fiber mode guda ɗaya?A zahiri, nau'ikan fiber na yanayin guda ɗaya suna da alama sun fi rikitarwa fiye da fiber multimode.Akwai manyan tushe guda biyu na ƙayyadaddun ƙayyadaddun fiber na yanayin yanayin guda ɗaya.Ɗayan shine jerin ITU-T G.65x, ɗayan kuma shine IEC 60793-2-50 (an buga shi azaman BS EN 60793-2-50).Maimakon komawa zuwa duka ITU-T da IEC kalmomi, Zan tsaya kawai ga mafi sauƙi ITU-T G.65x a cikin wannan labarin.Akwai ƙayyadaddun ƙayyadaddun fiber na gani guda 19 daban-daban waɗanda ITU-T suka ayyana.
Kowane nau'i yana da nasa yanki na aikace-aikace kuma juyin halitta na waɗannan ƙayyadaddun fiber na gani yana nuna juyin halittar fasahar watsa shirye-shirye daga farkon shigarwa na fiber na gani guda ɗaya har zuwa yau.Zaɓin wanda ya dace don aikinku na iya zama mahimmanci dangane da aiki, farashi, aminci da aminci.A cikin wannan sakon, zan iya yin ƙarin bayani game da bambance-bambance tsakanin ƙayyadaddun tsarin G.65x na iyalai guda ɗaya na fiber na gani.Fatan taimaka muku yanke shawara mai kyau.
G.652
ITU-T G.652 fiber kuma an san shi da daidaitaccen SMF (fiber yanayin guda ɗaya) kuma shine fiber ɗin da aka fi turawa.Ya zo cikin bambance-bambancen guda huɗu (A, B, C, D).A da B suna da kololuwar ruwa.C da D suna kawar da kololuwar ruwa don cikakken aikin bakan.G.652.A da G.652.B fibers an ƙera su don samun tsayin sifili-watsawa kusa da 1310 nm, saboda haka an inganta su don aiki a cikin 1310-nm band.Hakanan za su iya aiki a cikin rukunin 1550-nm, amma ba a inganta shi don wannan yanki ba saboda yawan tarwatsewa.Ana amfani da waɗannan filaye na gani galibi a cikin LAN, MAN da tsarin hanyar sadarwa.Bambance-bambancen baya-bayan nan (G.652.C da G.652.D) suna nuna raguwar kololuwar ruwa wanda ke ba su damar amfani da su a cikin yanki mai tsayi tsakanin 1310 nm da 1550 nm suna goyan bayan watsawar Coarse Wavelength Division Multiplexed (CWDM).
G.653
G.653 yanayin fiber guda ɗaya an haɓaka shi don magance wannan rikici tsakanin mafi kyawun bandwidth a tsayin tsayi da ƙarancin hasara a wani.Yana amfani da tsarin da ya fi rikitarwa a cikin babban yanki da ƙaramin yanki mai ƙanƙanta, kuma an canza tsayin sifilin watsawar chromatic zuwa 1550 nm don yin daidai da mafi ƙarancin asarar fiber.Saboda haka, G.653 fiber kuma ana kiransa fiber-shifted fiber (DSF).G.653 yana da ƙananan girman girman mahimmanci, wanda aka inganta don tsarin watsa yanayin yanayi mai tsawo na tsawon lokaci ta amfani da erbium-doped fiber amplifiers (EDFA).Duk da haka, babban ƙarfin ƙarfinsa a cikin fiber core na iya haifar da sakamako mara kyau.Ɗaya daga cikin mafi damuwa, haɗakar igiyoyin igiyoyi huɗu (FWM), yana faruwa a cikin tsarin Dimbin Wavelength Division Multiplexed (CWDM) tare da tarwatsewar sifilin chromatic, yana haifar da tsangwama mara yarda da tsangwama tsakanin tashoshi.
G.654
Ƙididdigar G.654 mai suna "Halayen yanke-kashe canza yanayin fiber da kebul na gani ɗaya."Yana amfani da babban girman girman da aka yi daga silica mai tsafta don cimma aikin tsayin daka iri ɗaya tare da ƙarancin ƙima a cikin rukunin 1550-nm.Yawancin lokaci kuma yana da babban watsawar chromatic a 1550 nm, amma ba a tsara shi don aiki a 1310 nm kwata-kwata.G.654 fiber na iya ɗaukar matakan wutar lantarki mafi girma tsakanin 1500 nm da 1600 nm, wanda aka tsara musamman don aikace-aikacen teku mai tsayi mai tsayi.
G.655
G.655 da aka sani da wadanda ba sifili watsawa-shifted fiber (NZDSF).Yana da ƙananan, sarrafa adadin watsawar chromatic a cikin C-band (1530-1560 nm), inda amplifiers ke aiki mafi kyau, kuma yana da babban yanki fiye da G.653 fiber.Fiber NZDSF ta shawo kan matsalolin da ke da alaƙa da haɗuwa da igiyoyi huɗu da sauran abubuwan da ba su dace ba ta hanyar matsar da tsayin sifili-watsawa a waje da taga aiki na 1550-nm.Akwai nau'ikan NZDSF guda biyu, waɗanda aka sani da (-D) NZDSF da (+D) NZDSF.Suna da daidaitaccen gangare mara kyau da tabbatacce tare da tsayin raƙuman ruwa.Hoton da ke gaba yana kwatanta kaddarorin tarwatsa nau'ikan fiber guda huɗu na manyan yanayin guda ɗaya.Matsakaicin watsawar chromatic na G.652 fiber mai yarda shine 17ps/nm/km.G.655 fibers an fi amfani dasu don tallafawa tsarin tsayin daka waɗanda ke amfani da watsa DWDM.
G.656
Kazalika filayen da ke aiki da kyau a cikin kewayon tsayin raƙuman ruwa, wasu an ƙirƙira su don yin aiki mafi kyau a takamaiman tsayin raƙuman ruwa.Wannan shine G.656, wanda kuma ake kira Medium Dispersion Fiber (MDF).An ƙera shi don samun damar gida da fiber mai tsayi mai tsayi wanda ke aiki da kyau a 1460 nm da 1625 nm.Irin wannan nau'in fiber an haɓaka shi don tallafawa tsarin tsayin daka wanda ke amfani da watsawar CWDM da DWDM akan kewayon tsayin tsayin daka.Kuma a lokaci guda, yana ba da damar sauƙaƙe ƙaddamar da CWDM a cikin yankunan birni, da kuma ƙara ƙarfin fiber a cikin tsarin DWDM.
G.657
G.657 filaye na gani an yi niyya don dacewa da filayen gani na G.652 amma suna da bambance-bambancen aikin lanƙwasa.An ƙera shi don ƙyale zaruruwa su lanƙwasa, ba tare da shafar aiki ba.Ana samun wannan ta hanyar maɓalli na gani wanda ke nuna madaidaicin haske a baya a cikin ainihin, maimakon a rasa shi a cikin sutura, yana ba da damar lanƙwasa fiber ɗin.Kamar yadda muka sani, a cikin USB TV da FTTH masana'antu, yana da wuya a sarrafa radius lanƙwasa a cikin filin.G.657 shine sabon ma'auni don aikace-aikacen FTTH, kuma, tare da G.652 shine mafi yawan amfani da su a cikin hanyoyin sadarwar fiber na ƙarshe.
Daga nassi na sama, mun san cewa nau'in nau'in nau'in fiber guda ɗaya yana da aikace-aikace daban-daban.Tun da G.657 ya dace da G.652, wasu masu tsarawa da masu sakawa yawanci suna iya fuskantar su.A gaskiya ma, G657 yana da radius mafi girma fiye da G.652, wanda ya dace da aikace-aikacen FTTH.Kuma saboda matsalolin G.643 da ake amfani da su a cikin tsarin WDM, yanzu ba a cika tura shi ba, G.655 ya maye gurbinsa.G.654 ana amfani da shi ne a aikace-aikacen teku.Dangane da wannan nassi, Ina fata kuna da cikakkiyar fahimta game da waɗannan filaye guda ɗaya, waɗanda zasu iya taimaka muku yanke shawara mai kyau.
Lokacin aikawa: Satumba-03-2021