Dangane da ka'idodin ITU-T, fibers na gani na sadarwa sun kasu kashi 7: G.651 zuwa G.657.Menene banbancin su?
1, G.651 fiber
G.651 fiber ne Multi-mode fiber, kuma G.652 zuwa G.657 duk filaye ne guda ɗaya.
Fiber na gani ya ƙunshi core, cladding da shafi, kamar yadda aka nuna a hoto 1.
Gabaɗaya diamita na cladding shine 125um, Layer shafi (bayan canza launi) shine 250um;kuma core diamita ba shi da wani ƙayyadadden ƙima, saboda bambanci na core diamita zai canza Tantancewar fiber watsa aikin a cikin babbar.
Hoto 1. Tsarin fiber
A al'ada core diamita na multimode fiber daga 50um zuwa 100um.Ayyukan watsawa na fiber yana inganta sosai lokacin da diamita na tsakiya ya zama karami.Kamar yadda aka nuna a hoto na 2.
Hoto 2. Multi yanayin watsa
Yanayin watsawa ɗaya kawai lokacin da ainihin diamita na fiber ɗin ya ƙanƙanta da wani ƙima, kamar yadda aka nuna a hoto 3, wanda ya zama fiber-mode guda ɗaya.
Hoto 3. Yanayin guda ɗaya watsa
2, G.652 Fiber
G.652 fiber optic fiber shine mafi yawan amfani da fiber na gani. A halin yanzu, ban da fiber zuwa gida (FTTH) na USB na gida, fiber na gani da aka yi amfani da shi a nesa mai nisa da yanki na birni kusan dukkanin fiber na gani na G.652. Hakanan. abokan ciniki suna yin odar irin wannan nau'in mafi yawa daga Honwy.
Attenuation yana ɗaya daga cikin mahimman abubuwan da ke shafar nisan watsawar fiber na gani.Ƙididdigar ƙididdigewa na fiber na gani yana da alaƙa da tsayin daka.Kamar yadda aka nuna a cikin hoto na 4. Ana iya gani daga adadi cewa raguwar fiber a 1310nm da 1550nm yana da ƙananan ƙananan, don haka 1310nm da 1550nm sun zama windows masu tsayi da aka fi amfani da su don nau'i-nau'i guda ɗaya.
Hoto 4. Attenuation coefficient na guda yanayin fiber
3, G.653 Fiber
Bayan an ƙara saurin tsarin sadarwa na gani, watsa sigina ya fara shafar tarwatsewar fiber.Watsawa tana nufin karkatar da sigina (faɗaɗɗen bugun jini) wanda ke haifar da abubuwa daban-daban na mitar ko sassa daban-daban na sigina (pulse) da ke yaɗuwa cikin sauri daban-daban da isa wani tazara, kamar yadda aka nuna a hoto na 5.
Hoto 5. Watsewar fiber
Ƙididdigar watsawar fiber na gani kuma yana da alaƙa da tsayin daka, kamar yadda aka nuna a cikin hoto na 6. Fiber-mode fiber yana da mafi ƙanƙanta ƙididdiga a 1550 nm, amma ƙididdigar watsawa a wannan tsayin tsayin ya fi girma.Don haka mutane suka ɓullo da fiber mai nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'i-nau'i-dispersion) yana watsawa 0 a 1550nm.Wannan da alama cikakkiyar fiber shine G.653.
Hoto 6. Ƙididdigar watsawa na G.652 da G.653
Duk da haka, watsawar fiber na gani shine 0 amma bai dace da amfani da tsarin raƙuman raƙuman ruwa (WDM), don haka G.653 fiber na gani da sauri ya kawar da shi.
4, G.654 Fiber
G.654 fiber optic ana amfani da shi ne a cikin tsarin sadarwar kebul na karkashin ruwa.Domin saduwa da buƙatun nesa da babban ƙarfi na sadarwar kebul na karkashin ruwa.
5, G.655 Fiber
G.653 fiber yana da sifili watsawa a 1550nm tsayin raƙuman ruwa kuma baya amfani da tsarin WDM, don haka fiber tare da ƙananan ƙananan amma ba sifili ba a 1550nm tsayin raƙuman ruwa an haɓaka.Wannan shine G.655 fiber.G.655 fiber tare da ƙarami ƙarami kusa da 1550nm raƙuman ruwa, ƙananan watsawa kuma ba sifili ba, kuma ana iya amfani dashi a cikin tsarin WDM;Saboda haka, G.655 fiber ya kasance zabi na farko don layin ganga mai nisa fiye da shekaru 20 a kusa da 2000. Ana nuna ƙimar ƙima da rarrabawar fiber na G.655 a cikin Hoto 7.
Hoto 7. Ƙididdigar watsawa na G.652/G.653/G.655
Duk da haka, irin wannan kyakkyawan fiber na gani kuma yana fuskantar ranar kawarwa.Tare da balagagge na watsawa diyya fasaha, G.655 fiber da aka maye gurbinsu da G.652 fiber.An fara daga kusan 2005, layin gangar jikin mai nisa ya fara amfani da fiber na gani na G.652 akan babban sikelin.A halin yanzu, G.655 fiber optic kusan ana amfani da shi ne kawai don kula da ainihin layin dogon nesa.
Akwai wani muhimmin dalilin da ya sa G.655 fiber ke shafe:
Yanayin filin diamita misali na G.655 fiber ne 8～11μm (1550nm).Yanayin filin diamita na filaye da masana'antun fiber daban-daban ke samarwa na iya samun babban bambanci, amma babu wani bambanci a cikin nau'in fiber, kuma fiber tare da babban bambanci a diamita na filin yana da alaƙa Wani lokaci akwai babban attenuation, wanda ke kawo girma. rashin jin daɗi ga kiyayewa;Saboda haka, a cikin akwati tsarin, masu amfani za su zabi G.652 fiber maimakon G.655, ko da yana bukatar mafi girma watsawa diyya halin kaka.
6, G.656 Fiber
Kafin gabatar da fiber na gani na G.656, bari mu koma zamanin da G.655 ya mamaye layin gangar jikin mai nisa.
Daga hangen nesa na attenuation halaye, G.655 fiber za a iya amfani da sadarwa a cikin wavelength kewayon daga 1460nm zuwa 1625nm (S + C + L band), amma saboda watsawa coefficient na fiber kasa 1530nm ne ma kananan, shi ne ba dace da rabon tsayin raƙuman ruwa (WDM).) tsarin da aka yi amfani da shi, don haka kewayon tsayin da ake amfani da shi na G.655 fiber shine 1530nm～1525nm (C+L band).
Domin yin 1460nm-1530nm zangon zango (S-band) na fiber na gani kuma za'a iya amfani dashi don sadarwa, yi ƙoƙarin rage gangaren gangara na fiber na gani na G.655, wanda ya zama fiber na gani na G.656.Ƙididdigar attenuation coefficient da disperssion coefficient na G.656 fiber ana nuna su a hoto na 8.
Hoto 8
Saboda abubuwan da ba na layi ba na fiber na gani, adadin tashoshi a cikin tsarin WDM mai nisa ba zai karu sosai ba, yayin da farashin ginin filaye na gani na babban birni yana da ƙananan ƙananan.Ba shi da ma'ana don ƙara yawan tashoshi a cikin tsarin WDM.Saboda haka, na yanzu m raƙuman raƙuman raƙuman ruwa (DWDM) ) Yafi har yanzu 80/160 kalaman, C + L kalaman band na Tantancewar fiber isa ga saduwa da bukatar.Sai dai idan tsarin mai sauri yana da buƙatu mafi girma don tazarar tashoshi, G.656 fiber ba zai taɓa samun babban amfani ba.
6, G.657 Fiber
G.657 fiber optic shine fiber na gani da aka fi amfani dashi banda G.652.Kebul na gani da aka yi amfani da shi don gidan FTTH wanda ya fi ƙarancin layin tarho, yana tare da fiber G.657 a ciki. Idan kuna buƙatar ƙarin cikakkun bayanai game da shi, pls sami https://www.gl-fiber.com/bare-optical-fiber / ko imel zuwa [email protected], Godiya!