Enwere akara ule 5 nke eriri multimode: OM1, OM2, OM3, OM4, na ugbu a OM5. Gịnị kpọmkwem mere ha dị iche?
Na isi (mgbaghara nke pun), ihe na-ekewa akara ule fiber ndị a bụ nha ha, ndị na-ebugharị, na ike bandwit.
Ngwa ngwa anya multimode (OM) eriri nwere isi nke 50 µm (OM2-OM5) ma ọ bụ 62.5 µm (OM1). Isi nke ka ukwuu pụtara na ọtụtụ ụdị ọkụ na-agbadata isi n'otu oge, yabụ aha ya bụ "multimode."
Fibers Legacy
N'ụzọ dị mkpa, nha isi 62.5 µm nke OM1 pụtara na ọ dakọtara na akara ule ndị ọzọ nke multimode na enweghị ike ịnakwere otu njikọ ahụ. Ebe OM1 na OM2 nwere ike inwe jaket elu oroma (kwa ụkpụrụ TIA/EIA), lelee akụkọ ebipụta na eriri mgbe niile ka ị hụ na ị na-eji njikọ ziri ezi.
Akpa OM1 na OM2 eriri e mere ha abụọ maka ojiji na LED isi mmalite ma ọ bụ transmitters. Oke modulation nke LEDs kpachakwara ike nke OM1 na mmalite OM2.
Agbanyeghị, mkpa na-abawanye maka ọsọ pụtara na eriri anya chọrọ ikike bandwidth dị elu. Tinye eriri multimode nke laser kachasị mma (LOMMF):OM2, OM3 na OM4, ma ugbu a OM5.
Laser-njikarịcha
OM2, OM3, OM4, na OM5 emebere fibers ka ha na-arụ ọrụ na vetikal-cavity surface-emitting lasers (VCSELs), n'ozuzu na 850 nm. Taa, OM2 emebere laser (dị ka nke anyị) dịkwa ngwa ngwa. VCSEL na-enye ohere mgbanwe ngwa ngwa karịa LED, nke pụtara na eriri laser kachasị mma nwere ike ibunye data karịa.
Kwa ụkpụrụ ụlọ ọrụ, OM3 nwere bandwit modal dị irè (EMB) nke 2000 MHz * km na 850 nm. OM4 nwere ike ijikwa 4700 MHz*km.
N'ihe gbasara njirimara, OM2 na-ejigide jaket oroma, dị ka e kwuru n'elu. OM3 na OM4 nwere ike ịnwe jaket aqua mpụta (nke a bụ eziokwu nke Cleerline OM3 na OM4 patch cables). OM4 nwere ike ịpụta ọzọ na jaket mpụta "Erika violet". Ọ bụrụ na ị na-agbaba na eriri magenta fiber optic na-egbuke egbuke, ọ ga-abụ OM4. N'ụzọ obi ụtọ, OM2, OM3, OM4, na OM5 bụ eriri 50/125 µm ma nwee ike ịnakwere otu njikọ. Mara, otu ọ dị, na koodu agba njikọ dị iche. Enwere ike ịkanye ụfọdụ njikọ multimode dị ka “kachasịkwara maka fiber OM3/OM4” ma ga-abụ akwa mmiri. Ọkọlọtọ laser kacha mma multimode njikọ nwere ike ịbụ agba aja aja ma ọ bụ oji. Ọ bụrụ na enwere mgbagwoju anya, biko lelee nkọwapụta njikọ kpọmkwem gbasara nha isi. Ịdaba nha nke isi bụ njirimara kachasị mkpa maka njikọta igwe, ebe ọ na-eme ka mgbama ahụ nọgide na-aga n'ihu site na njikọ.
Oge nzipu: Ọgọst-01-2022