ʻO ka fiber optical kahi ala uwea no ka hoʻouna ʻana i nā hōʻailona opi.
Kāhea mākou i nā hōʻailona uila i makemake ʻole ʻia i ke kahawai "noise ʻO ka walaʻau i loko o ka ʻōnaehana kamaʻilio ua superimposed ma ka hōʻailona.Inā ʻaʻohe hōʻailona hoʻouna, aia pū kekahi walaʻau i ka ʻōnaehana kamaʻilio.“ʻO ka walaʻaunoho mau i ka ʻōnaehana kamaʻilio.Hiki ke noʻonoʻo ʻia ka walaʻau ma ke ʻano he ʻano keakea ʻana i ke kahawai, ʻike ʻia hoʻi he interference additive no ka mea ua kau ʻia ma luna o ka hōʻailona.Hoʻopilikia ka walaʻau i ka hoʻouna ʻana i ka hōʻailona.Hiki iā ia ke hoʻohaunaele i ka hōʻailona analog, hoʻopau i ka hōʻailona kikohoʻe, a hoʻolohi i ka wikiwiki o ka hoʻouna ʻana i ka ʻike.
Wahi a kahoʻokaʻawale kumu, hiki ke maheleia ka walaau iʻelua ʻano: walaʻau i hana ʻia e ke kanaka a me ka walaʻau kūlohelohe.Hoʻokumu ʻia ka walaʻau artificial e nā hana kanaka, e like me nā uila uila i hoʻokumu ʻia e nā wili uila a me nā transients hoʻololi uila, nā ʻōhū uila i hana ʻia e nā ʻōnaehana hoʻāla kaʻa, ka hoʻopili ʻia e nā kukui fluorescent, a me ka radiation hawewe electromagnetic i hana ʻia e nā lekiō ʻē aʻe a me nā mea pono hale.ʻO ka walaʻau kūlohelohe he ʻano like ʻole o ka radiation hawewe electromagnetic ma ke ʻano, e like me ka uila, ka lewa lewa, a me ka leo cosmic mai ka lā a me ka galaxy Eia kekahi, aia kahi walaʻau kūlohelohe koʻikoʻi, ʻo ia hoʻi, ka leo thermal Noise mai ka neʻe wela. o nā electrons i nā mea kū'ē a pau.No ka laʻana, hoʻopuka nā uea, nā mea pale, a me nā mea semiconductor i ka walaʻau wela.
No laila, ʻike ʻia ka walaʻau wela ma nā ʻaoʻao a ʻike ʻole ʻia i loko o nā lako uila a pau ke ʻole ka lako i kamahana wela thermodynamico OK I loko o nā ʻāpana kū'ē, e neʻe mau ana nā electrons manuahi ma muli o ka ikehu wela a neʻe wale ma ke ala laina haʻihaʻi ma muli o ke kuʻi ʻana me nā mea ʻē aʻe i ka neʻe ʻana, ʻo ia hoʻi, ʻo Brownian motion I ka loaʻa ʻole o ka ikaika o waho, ka awelika o ka waiwai o kēia manawa. e ka Brownian motion o keia mau electrons ua like ia me ka zero, aka, e hanaia kekahi mea AC.Kapa ʻia kēia ʻāpana AC noise thermal.Nui nā alapine o ka leo wela, mai ka 0 Hz a i ka 102 Hz, a ua pālahalaha like lākou a pau.
ʻO kēia ka ʻatikala "noise in the channel" i lawe mai iā ʻoe e Shenzhen HDV phoelectron Technology Co., Ltd. manaʻolana kēia ʻatikala hiki ke kōkua iā ʻoe e hoʻonui i kou ʻike.Ma waho aʻe o kēia ʻatikala inā ʻoe e ʻimi nei i kahi ʻoihana mea hana uila fiber optical maikaʻi āu e noʻonoʻo aie pili ana iā mākou.
ʻO Shenzhen HDV phoelectron Technology Co., Ltd. ʻo ia ka mea hana nui i nā huahana kamaʻilio.I kēia manawa, uhi nā mea hana i hana ʻia i kamoʻo ONU, moʻo module optical, OLT moʻo, amoʻo transceiver.Hiki iā mākou ke hāʻawi i nā lawelawe kūikawā no nā hiʻohiʻona like ʻole.Aloha oekukakuka.