Kodi G.654E CHIKWANGWANI ndi chiyani?

M'zaka zaposachedwa, mtundu watsopano wa G.654E optical fiber wakhala ukugwiritsidwa ntchito m'mizere ina yamtunda wautali ndipo wapeza zotsatira zabwino. Ndiye G.654E kuwala CHIKWANGWANI ndi chiyani? Kodi CHIKWANGWANI cha G.654E chidzalowa m'malo mwachikale cha G.652D?

M'katikati mwa zaka za m'ma 1980, kuti akwaniritse zofunikira zoyankhulirana mtunda wautali wa zingwe zapansi pamadzi, makina opangidwa ndi silica core single-mode optical fiber ndi kutalika kwa 1550 nm anapangidwa. Kutsika kwake pafupi ndi kutalika kwa mafundewa ndi 10% kucheperakoOptic fiberG.652 ikubwera.

Ulusi wamtunduwu umatchulidwa kuti ulusi wa G.654, ndipo dzina lake panthawiyo linali "1550 nm wavelength minimum attenuation single-mode fiber."

M'zaka za m'ma 1990, ukadaulo wa WDM unayamba kugwiritsidwa ntchito pamakina olumikizirana pansi pamadzi. Ukadaulo wa WDM umalola kufalikira kwanthawi imodzi kwanjira zingapo kapena mazana ambiri mu fiber optic, ndipo pogwiritsa ntchito ma fiber optic amplifiers, ma siginecha owoneka bwino amphamvu kwambiri amaphatikizidwa kukhala chingwe chowonekera ndikusonkhanitsidwa pang'ono . kuwonetsa mawonekedwe osatsata mzere.

Chifukwa cha zotsatira zopanda malire za fiber optical, pamene mphamvu ya kuwala imalowa mu fiber imaposa mtengo wina, ntchito yopatsirana imachepa pang'onopang'ono ndi kuwonjezeka kwa mphamvu ya kuwala yomwe imalowa mu fiber.
Zotsatira zopanda malire za fiber optical zimagwirizana ndi mphamvu ya kuwala kwa fiber core Pamene mphamvu yowonjezera yowonjezera imakhala yosasinthasintha, powonjezera malo ogwira mtima a fiber optical ndi kuchepetsa mphamvu ya kuwala kwa fiber core. chikoka cha nonlinear zotsatira ntchito kufala akhoza kuchepetsedwa. Chifukwa chake, G.654 optical fiber idayamba kukangana pakuwonjezera malo ogwira mtima.

Kuwonjezeka kwa gawo logwira ntchito la ulusi kumabweretsa kuwonjezeka kwa kutalika kwa mawonekedwe a cutoff, koma kuwonjezeka kwa mawonekedwe a cutoff kuyenera kuwongoleredwa kuti kusakhudze kugwiritsa ntchito ulusi mu C band (1530nm ~ 1565nm) , Choncho, cutoff wavelength ya G.654 fiber imayikidwa ku 1530nm.

Mu 2000, pamene ITU inakonzanso G.654 optical fiber standard, inasintha dzina kukhala "cutoff wavelength-shifted single-mode optical fiber."

Mpaka pano, G.654 optical fiber ili ndi makhalidwe awiri ochepetsetsa komanso malo akuluakulu ogwira ntchito. Pambuyo pake, G.654 optical fiber yomwe imagwiritsidwa ntchito polumikizana ndi chingwe chapansi pamadzi idakonzedwa makamaka pozungulira malo ochepetsetsa komanso ogwira ntchito, ndipo pang'onopang'ono idapangidwa kukhala magawo anayi a A/B/C/D.