Aia nā māka 5 o ka fiber multimode: OM1, OM2, OM3, OM4, a i kēia manawa OM5. He aha ka mea e ʻokoʻa ai lākou?
Ma ke kumu (e kala mai i ka pun), he aha ka mea e hoʻokaʻawale ai i kēia mau māka fiber ko lākou nui nui, nā mea hoʻouna, a me nā mana bandwidth.
He 50 µm (OM2-OM5) a i ʻole 62.5 µm (OM1) nā fibers multimode (OM). ʻO ke kumu nui, ʻo ia ka hele ʻana o nā ʻano māmā he nui i lalo i ke kumu i ka manawa like, no laila ka inoa "multimode."
Legacy Fibers
ʻO ka mea nui, ʻo ka nui kumu 62.5 µm o OM1 ʻaʻole kūpono ia me nā māka ʻē aʻe o ka multimode a ʻaʻole hiki ke ʻae i nā mea hoʻohui like. No ka mea hiki iā OM1 a me OM2 ke loaʻa nā ʻalani waho (e like me nā kūlana TIA/EIA), e nānā mau i ka moʻolelo paʻi ma ke kaula e hōʻoia i ka hoʻohana ʻana i nā mea hoʻopili pololei.
Ua hoʻolālā ʻia nā fibers OM1 a me OM2 mua no ka hoʻohana ʻana me nā kumu LED a i ʻole nā mea hoʻouna. ʻO nā palena modulation o nā LED i kaupalena i ka hiki o OM1 a me OM2 mua.
Eia nō naʻe, ʻo ka piʻi ʻana o ka pono no ka wikiwiki, ʻo ia ka mea e pono ai nā fiber optical i nā mana bandwidth kiʻekiʻe. E komo i ka laser-optimized multimode fibers (LOMMF): OM2, OM3 a me OM4, a i kēia manawa OM5.
Laser-Optimization
Hoʻolālā ʻia nā fibers OM2, OM3, OM4, a me OM5 e hana me nā lasers surface-emitting surface-cavity (VCSEL), maʻamau ma 850 nm. I kēia lā, loaʻa koke ka OM2 i hoʻopaʻa ʻia i ka laser (e like me kā mākou). Hāʻawi nā VCSEL i ka wikiwiki o ka hoʻololi ʻana ma mua o nā LED, ʻo ia hoʻi e hiki i nā fiber-optimized laser ke hoʻouna i nā ʻikepili ʻoi aku.
Ma nā kūlana o ka ʻoihana, loaʻa iā OM3 kahi bandwidth modal kūpono (EMB) o 2000 MHz*km ma 850 nm. Hiki iā OM4 ke mālama i ka 4700 MHz*km.
Ma ke ʻano o ka ʻike, mālama ʻo OM2 i ka lole ʻalani, e like me ka mea i hōʻike ʻia ma luna. Hiki iā OM3 a me OM4 ke loaʻa i ka ʻaʻahu o waho aqua (ʻoiaʻiʻo kēia no Cleerline OM3 a me OM4 patch cable). Hiki ke ʻike ʻia ʻo OM4 me kahi ʻaʻahu waho "Erika violet". Inā ʻoe e holo i loko o kahi kaula uila magenta fiber optic, ʻo ia paha ʻo OM4. ʻO ka hauʻoli, ʻo OM2, OM3, OM4, a me OM5 he mau fiber 50/125 µm a hiki ke ʻae i nā mea hoʻohui like. E hoʻomaopopo naʻe, ʻokoʻa nā code kala hoʻohui. Hiki ke kaha ʻia kekahi mau mea hoʻohui multimode ma ke ʻano he "maikaʻi no ka fiber OM3/OM4" a e waiho ʻia i ka wai kala. Hiki ke beige a ʻeleʻele paha nā mea hoʻohui multimode laser-optimized maʻamau. Inā he huikau, e ʻoluʻolu e nānā i ka kikoʻī konohiki e pili ana i ka nui kumu. ʻO ka hoʻohālikelike ʻana i ka nui kumu ka mea nui loa no nā mea hoʻohui mechanical, ʻoiai e hōʻoiaʻiʻo ana e hoʻomau ka hōʻailona i ka hoʻomau ma o ka mea hoʻohui.
Ka manawa hoʻouna: ʻAukake-01-2022