I ka noiʻi a me ka hoʻomohala ʻana i nā ʻenehana fiber optical hou, ua huki nui ka SDM space division multiplexing i ka nānā ʻana. ʻElua mau kuhikuhi nui no ka hoʻopili ʻana o SDM i nā fiber optical: core division multiplexing (CDM), kahi e lawe ʻia ai ka hoʻoili ʻana ma o ke kumu o kahi fiber optical multi-core. A i ʻole Mode Division Multiplexing (MDM), kahi e hoʻoili ai ma o nā ʻano hoʻolaha o kahi fiber few-mode a multi-mode paha.
ʻO ke kumumanaʻo o ka fiber Core Division Multiplexing (CDM) ua hoʻokumu ʻia ma ka hoʻohana ʻana i ʻelua mau hoʻolālā nui.
ʻO ka mea mua e pili ana i ka hoʻohana ʻana i nā pūʻolo fiber hoʻokahi-core (nā lipine fiber), kahi i hoʻopili ʻia ai nā fibers hoʻokahi-ʻano like e hana i nā pūʻolo fiber a i ʻole nā lipine e hiki ke hāʻawi i nā haneli o nā loulou like.
ʻO ka lua o ke koho e pili ana i ka hoʻoili ʻana i ka ʻikepili ma luna o kahi core hoʻokahi (ʻano hoʻokahi no kēlā me kēia core) i hoʻokomo ʻia i loko o ka fiber like, ʻo ia hoʻi i loko o kahi fiber MCF multicore. Mālama ʻia kēlā me kēia core e like me kahi kahawai hoʻokahi kaʻawale.
ʻO ka fiber MDM (Module Division Multiplexing) e pili ana i ka hoʻoili ʻana o ka ʻikepili ma luna o nā ʻano like ʻole o kahi fiber optical, hiki ke manaʻo ʻia kēlā me kēia he kahawai kaʻawale.
ʻO nā ʻano maʻamau ʻelua o MDM he fiber multimode (MMF) a me ka fiber mode fractional (FMF). ʻO ka ʻokoʻa nui ma waena o nā mea ʻelua ka helu o nā ʻano (nā kahawai i loaʻa). ʻOiai hiki i nā MMF ke kākoʻo i kahi helu nui o nā ʻano (nā ʻumi o nā ʻano), lilo ka intermodal crosstalk a me ka differential mode group delay (DMGD) i mea nui.
Aia kekahi fiber crystal photonic (PCF) hiki ke ʻōlelo ʻia no kēia ʻano. Hoʻokumu ʻia ia ma nā waiwai o nā kristal photonic, ka mea e hoʻopaʻa i ka mālamalama ma o ka hopena bandgap a hoʻouna iā ia me ka hoʻohana ʻana i nā lua ea i loko o kona ʻāpana kea. Hana nui ʻia ka PCF me nā mea e like me SiO2, As2S3, a me nā mea ʻē aʻe, a hoʻokomo ʻia nā lua ea ma kahi a puni ke kumu i mea e hoʻololi ai i ka ʻokoʻa ma ka index refractive ma waena o ke kumu a me ka cladding.
Hiki ke wehewehe ʻia ka fiber CDM ma ke ʻano he hoʻohui wale ʻana o nā cores fiber mode hoʻokahi e lawe ana i ka ʻike, i hoʻokomo ʻia i loko o ka cladding like (multi-core fiber MCF a i ʻole single-core fiber bundle). ʻO ka MDM mode division multiplexing ka hoʻohana ʻana i nā ʻano spatial-optical he nui i loko o ka medium transmission ma ke ʻano he mau kahawai ʻikepili pākahi/kaʻawale/kūʻokoʻa, maʻamau no ka hoʻoili ʻana i kahi mamao pōkole.
Ka manawa hoʻouna: Iune-26-2025