Ni irihe tandukaniro: OM3 vs OM4?
Mubyukuri, itandukaniro riri hagati ya OM3 vs OM4 fibre iri mubwubatsi bwa fibre optique.Itandukaniro ryubwubatsi bivuze ko umugozi wa OM4 ufite attenuation nziza kandi ushobora gukora kumurongo mwinshi kuruta OM3.Ni izihe mpamvu zibitera?Kugirango fibre ihuza akazi, urumuri ruva muri VCSEL rwinshi rufite imbaraga zihagije zo kugera kubakira kurundi ruhande.Hano haribikorwa bibiri byimikorere ishobora gukumira ibi-optique attenuation na modal dispersion.
Attenuation nigabanuka ryimbaraga zumucyo uko yanduye (dB).Attenuation iterwa nigihombo mumucyo binyuze mubice byoroshye, nkinsinga, insinga za kabili, hamwe nabahuza.Nkuko byavuzwe haruguru abahuza ni bamwe rero itandukaniro ryimikorere muri OM3 vs OM4 riri mubihombo (dB) mumugozi.OM4 fibre itera igihombo gito kubera iyubakwa ryayo.Umubare ntarengwa wemewe nu bipimo urerekanwa hepfo.Urashobora kubona ko gukoresha OM4 bizaguha igihombo gito kuri metero ya kabili.Igihombo cyo hasi bivuze ko ushobora kugira amahuza maremare cyangwa ufite byinshi uhuza.
Ntarengwa ntarengwa yemerewe kuri 850nm: OM3 <3.5 dB / Km;OM4 <3.0 dB / Km
Umucyo woherezwa muburyo butandukanye kuri fibre.Bitewe nudusembwa muri fibre, ubu buryo bugera nkibihe bitandukanye.Nkuko iri tandukaniro ryiyongera amaherezo ugera aho amakuru atangwa adashobora kwandikwa.Iri tandukaniro hagati yuburyo bwo hejuru kandi bwo hasi buzwi nka modal dispersion.Ikwirakwizwa rya modal rigena umurongo wa modal fibre ishobora gukora kandi iri ni itandukaniro riri hagati ya OM3 na OM4.Hasi ya modal ikwirakwizwa, niko modal yagutse kandi ninshi namakuru ashobora koherezwa.Umuyoboro mugari wa OM3 na OM4 urerekanwa hepfo.Umuyoboro mwinshi uboneka muri OM4 bisobanura gutandukanya modal ntoya bityo bigatuma imiyoboro ya kabili iba ndende cyangwa ikemerera igihombo kinini binyuze mumihuza myinshi.Ibi bitanga amahitamo menshi iyo urebye igishushanyo mbonera.
Umuyoboro muto wa fibre ntarengwa kuri 850nm: OM3 2000 MHz · km;OM4 4700 MHz · km
Hitamo OM3 cyangwa OM4?
Kubera ko kwiyongera kwa OM4 biri munsi ya fibre ya OM3 kandi umurongo wa modal ya OM4 uruta OM3, intera yoherejwe ya OM4 ni ndende kuruta OM3.
| Ubwoko bwa Fibre | 100BASE-FX | 1000BASE-SX | 10GBASE-SR | 40GBASE-SR4 | 100GBASE-SR4 |
| OM3 | Ibipimo 2000 | Metero 550 | Metero 300 | Metero 100 | Metero 100 |
| OM4 | Ibipimo 2000 | Metero 550 | Metero 400 | Metero 150 | Metero 150 |
Igihe cyo kohereza: Nzeri-03-2021