Fibre ya G.654E ni iki?

Mu myaka ya vuba aha, ubwoko bushya bwa fibre optique, G.654E, bwakoreshejwe mu miterere imwe n'imwe y'umugongo ikora kure kandi bwageze ku musaruro mwiza. None se fibre optique ya G.654E ni iki? Ese fibre ya G.654E izasimbura fibre isanzwe ya G.652D?

Hagati mu myaka ya za 1980, kugira ngo habeho itumanaho rinini ry’insinga zo munsi y’amazi za fiber optique, hakozwe fibre optique ifite uburyo bumwe ifite imiterere ya silica nziza n’uburebure bwa 1550 nm. Uburemere bwayo hafi y’ubu buremere buri hasi ya 10% ugereranyije n’ubwa Fiber optique G.652 iri hejuru.

Ubu bwoko bwa fibre busobanurwa nka fibre ya G.654, kandi icyo gihe izina ryayo ryari "fibre imwe ifite ubushobozi bwo kugabanya ubunini bwa 1550 nm".

Mu myaka ya 1990, ikoranabuhanga rya WDM ryatangiye gukoreshwa muri sisitemu y'itumanaho ry'urumuri munsi y'amazi. Ikoranabuhanga rya WDM ryemerera kohereza icyarimwe imiyoboro myinshi cyangwa amagana y'urumuri hejuru y'urumuri rumwe, kandi hakoreshejwe amplifiers za fiber optique, ibimenyetso by'urumuri bifite imbaraga nyinshi kandi birebire byinshi bihuzwa mu rumuri rumwe bigahurizwa ku buryo buto. Ibi bimenyetso bigaragaza imiterere idasobanutse.

Bitewe n’ingaruka zitari z’umurongo za fibre optique, iyo imbaraga za fibre zinjira muri fibre zirenze agaciro runaka, imikorere yo kohereza ibintu muri sisitemu igenda igabanuka buhoro buhoro uko imbaraga za fibre zinjira muri fibre ziyongera.
Ingaruka zitari z'umurongo zifitanye isano n'ubucucike bw'imbaraga z'urumuri rw'imbere rwa fibre. Iyo imbaraga z'urumuri zinjira zihoraho, kongera agace gakomeye k'urumuri rw'imbere rwa fibre no kugabanya ubucucike bw'imbaraga z'urumuri rw'imbere rwa fibre bishobora kugabanya ingaruka z'ingaruka zitari z'umurongo ku mikorere y'itumanaho. Kubwibyo, fibre ya G.654 yatangiye guteza impaka bitewe n'ubwiyongere bw'agace gakomeye k'imbere.

Kongera ubuso bukora neza bwa fibre bizatuma uburebure bw'umurambararo buzamuka, ariko ubwiyongere bw'uburebure bw'umurambararo bugomba kugenzurwa kugira ngo bitagira ingaruka ku ikoreshwa rya fibre muri C band (1530nm ~ 1565nm), bityo, uburebure bw'umurambararo bwa fibre ya G.654 bushyirwa kuri 1530nm.

Mu 2000, ubwo ITU yavugururaga igipimo cya fibre optique cya G.654, yahinduye izina igira iti “fibre optique ya single-mode yaciwe n’uburebure bw’umurambararo”.

Kugeza ubu, fibre optique ya G.654 yaranzwe no kugabanya ubushobozi bw'amashanyarazi n'agace kanini gakora neza. Nyuma yaho, fibre optique ya G.654 yakoreshejwe mu itumanaho ry'insinga zo mu mazi yanonosowe cyane cyane mu kugabanya ubushobozi bw'amashanyarazi n'agace gakora neza, maze buhoro buhoro ihinduka ibyiciro bine: A, B, C, na D.