Wahi a nā kūlana ITU-T, ua māhele ʻia nā fiber optical kamaʻilio i 7 mau ʻāpana: G.651 a i G.657.He aha ka ʻokoʻa ma waena o lākou?
1、G.651 puluniu
G.651 he Multi-mode puluniu, a me G.652 i G.657 nā mea a pau he hookahi-mode fibers.
Hoʻokumu ʻia ka fiber optical me ka core, cladding and coating, e like me ka hōʻike ʻana ma ka Figure 1.
ʻO ka maʻamau ka 125um ka anawaena o ka pale, ka uhi ʻana (ma hope o ke kala ʻana) he 250um;a ʻaʻohe waiwai paʻa ke anawaena kumu, no ka mea, ʻo ka ʻokoʻa o ke anawaena koʻikoʻi e hoʻololi i ka hana hoʻoili fiber optical i ka nui.
Kiʻi 1. Hoʻolālā fiber
ʻO ka maʻamau ke anawaena kumu o ka fiber multimode mai 50um a 100um.Hoʻomaikaʻi maikaʻi ʻia ka hana hoʻoili ʻana o ka fiber ke liʻiliʻi ke anawaena kumu.E like me ka mea i hōʻike ʻia ma ke Kiʻi 2.
Kiʻi 2. Ka hoʻouna ʻana i ke ʻano he nui
Hoʻokahi wale nō ʻano hoʻoili i ka wā ʻoi aku ka liʻiliʻi o ke anawaena kumu o ka fiber ma mua o kekahi waiwai, e like me ka hōʻike ʻana ma ke Kiʻi 3, a lilo ia i fiber mode hoʻokahi.
Kiʻi 3. Ka hoʻouna ʻana i ke ʻano hoʻokahi
2、G.652 Fiber
ʻO ka fiber optical G.652 ka fiber optical i hoʻohana nuiʻia. I kēia manawa, ma waho aʻe o ka fiber i ka home (FTTH) home optical cable,ʻo ka fiber optical i hoʻohanaʻia ma ka lōʻihi lōʻihi a me ka metropolitan kahi kokoke i ka G.652 optical fiber.Also kauoha nui nā mea kūʻai i kēia ʻano mai Honww.
ʻO ka attenuation kekahi o nā mea koʻikoʻi e pili ana i ka mamao o ka lawe ʻana o ka fiber optical.Hoʻopili ʻia ka coefficient attenuation o kahi fiber optical me ka lōʻihi hawewe.E like me ka mea i hōʻike ʻia ma ka Figure 4. Hiki ke ʻike ʻia mai ke kiʻi ʻana o ka attenuation o ka fiber ma 1310nm a me 1550nm he liʻiliʻi liʻiliʻi, no laila ua lilo ʻo 1310nm a me 1550nm i mau puka makani lōʻihi loa i hoʻohana ʻia no nā fibers mode hoʻokahi.
Kiʻi 4. Ka helu hoʻemi o ka fiber mode hoʻokahi
3、G.653 Fiber
Ma hope o ka hoʻonui ʻia ʻana o ka wikiwiki o nā ʻōnaehana kamaʻilio optical, hoʻomaka ka hoʻoili ʻana i ka hōʻailona e pili i ka hoʻopuehu fiber.ʻO ka dispersion e pili ana i ka hōʻailona distortion (pulse broadening) i hoʻokumu ʻia e nā ʻāpana alapine like ʻole a i ʻole nā ʻano ʻano ʻano like ʻole o kahi hōʻailona (pulse) e hoʻolaha ana ma nā wikiwiki like ʻole a hiki i kahi mamao, e like me ka hōʻike ʻana ma ke Kiʻi 5.
Kiʻi 5. Hoʻopuehu fiber
ʻO ka dispersion coefficient o ka fiber optical e pili pū ana me ka nalu nalu, e like me ka mea i hōʻike ʻia ma ka Figure 6. ʻO ka fiber mode-hoʻokahi ka liʻiliʻi o ka attenuation coefficient ma 1550 nm, akā ʻoi aku ka nui o ka dispersion coefficient i kēia nalu.No laila ua hoʻomohala nā kānaka i kahi fiber mode hoʻokahi me ka dispersion coefficient o 0 ma 1550nm.ʻO G.653 kēia fiber me he mea lā.
Kiʻi 6. ʻO ka helu hoʻopuehu o G.652 a me G.653
Eia naʻe, ʻo ka hoʻopuehu ʻana o ka fiber optical he 0 akā ʻaʻole kūpono ia no ka hoʻohana ʻana i nā ʻōnaehana hawewe lōʻihi (WDM), no laila ua hoʻopau koke ʻia ka fiber optical G.653.
4、G.654 Fiber
Hoʻohana nui ʻia ʻo G.654 optical fiber i nā ʻōnaehana kamaʻilio submarine cable.I mea e hoʻokō ai i nā koi lōʻihi a me nā mana nui o ke kamaʻilio kelepona submarine.
5、G.655 Fiber
ʻAʻole hoʻopuehu ʻia ka fiber G.653 ma 1550nm ka lōʻihi o ka nalu a ʻaʻole hoʻohana i ka ʻōnaehana WDM, no laila ua hoʻomohala ʻia kahi fiber me ka liʻiliʻi akā ʻaʻole ka hoʻopuehu ʻana ma 1550nm.ʻO kēia ka fiber G.655.ʻO G.655 fiber me ka liʻiliʻi liʻiliʻi kokoke i ka nalu nalu 1550nm, ka liʻiliʻi liʻiliʻi a ʻaʻole ʻole, a hiki ke hoʻohana ʻia i nā ʻōnaehana WDM;No laila, ʻo G.655 fiber ka mea koho mua loa no nā laina kumu lāʻau lōʻihi ma mua o 20 mau makahiki ma kahi o 2000. Hōʻike ʻia ka coefficient attenuation a me ka dispersion coefficient o G.655 fiber ma ke Kiʻi 7.
Kiʻi 7. ʻO ka helu hoʻopuehu o G.652/G.653/G.655
Eia nō naʻe, ke kū nei kēlā fiber optical maikaʻi i kahi lā o ka hoʻopau ʻana.Me ka oʻo o ka ʻenehana uku hoʻopuehu, ua hoʻololi ʻia ka pulu G.655 e ka fiber G.652.E hoʻomaka ana mai ka makahiki 2005, ua hoʻomaka ka hoʻohana ʻana o nā laina kumu lōʻihi i ka fiber optical G.652 ma kahi ʻano nui.I kēia manawa, ʻaneʻane hoʻohana ʻia ka fiber optical G.655 no ka mālama ʻana i ka laina lōʻihi mua.
Aia kekahi kumu nui e hoʻopau ʻia ai ka fiber G.655:
ʻO ka maʻamau maʻamau kahua kahua o G.655 fiber he 8 ~ 11μm (1550nm).ʻO ke anawaena kahua mode o nā fiber i hana ʻia e nā mea hana fiber ʻokoʻa paha he ʻokoʻa nui, akā ʻaʻohe ʻokoʻa i ke ʻano o ka fiber, a pili ka fiber me ka ʻokoʻa nui i ke anawaena o ke kahua ʻano i kekahi manawa aia kahi attenuation nui, e lawe mai ana i ka nui. pilikia i ka mālama;No laila, ma ka ʻōnaehana kumu, e koho nā mea hoʻohana i ka fiber G.652 ma mua o G.655, ʻoiai inā makemake ʻia nā kumukūʻai uku hoʻopuehu.
6、G.656 Fiber
Ma mua o ka hoʻokomo ʻana i ka fiber optical G.656, e hoʻi kākou i ka wā i noho aliʻi ai ʻo G.655 i nā laina kumu lōʻihi.
Mai ka hiʻohiʻona o nā hiʻohiʻona attenuation, hiki ke hoʻohana ʻia ka fiber G.655 no ke kamaʻilio ʻana i ka lōʻihi hawewe mai 1460nm a 1625nm (S + C + L band), akā no ka liʻiliʻi o ka dispersion coefficient o ka fiber ma lalo o 1530nm, ʻaʻole ia. kūpono no ka mahele hawewe (WDM).) ʻōnaehana hoʻohana ʻia, no laila, ʻo 1530nm～1525nm (C+L band).
I mea e hiki ai ke hoʻohana i ka 1460nm-1530nm wavelength range (S-band) o ka fiber optical no ke kamaʻilio ʻana, e hoʻāʻo e hōʻemi i ka dispersion slope o ka G.655 optical fiber, i lilo i G.656 optical fiber.Hōʻike ʻia ka coefficient attenuation a me ka dispersion coefficient o G.656 fiber ma ke Kiʻi 8.
Helu 8
Ma muli o nā hopena laina ʻole o ka fiber optical, ʻaʻole e hoʻonui nui ʻia ka helu o nā kahawai i nā ʻōnaehana WDM lōʻihi, ʻoiai ke kumukūʻai o ke kūkulu ʻana i nā fiber optical metropolitan area.ʻAʻole kūpono ka hoʻonui ʻana i ka nui o nā kahawai ma nā ʻōnaehana WDM.No laila, ʻo ka ʻāpana hawewe lōʻihi o kēia manawa (DWDM) ) ʻO ka nalu 80/160 ka nui, ua lawa ka C + L o ka nalu o ka fiber optical e hoʻokō i ka koi.Inā ʻaʻole ʻoi aku nā koi o nā ʻōnaehana kiʻekiʻe no ka spacing channel, ʻaʻole loaʻa ka fiber G.656 i kahi hoʻohana nui.
6、G.657 Fiber
ʻO G.657 ka fiber optical ka mea i hoʻohana nui ʻia koe G.652.ʻO ke kaula optical i hoʻohana ʻia no ka home FTTH i ʻoi aku ka lahilahi ma mua o ka laina kelepona, aia me G.657 fiber i loko. / aiʻole leka uila iā [email protected], Mahalo!