I roto i te ao whakawhitiwhiti kōrero, te hononga pokapū raraunga, me te kawe ataata, he mea tino hiahiatia te whakamahi taura muka whatu. Heoi, ko te mea pono, kāore te taura muka whatu i te kōwhiringa ōhanga, kāore hoki i te whai hua mō ia ratonga takitahi. Nō reira, he mea tino taunaki te whakamahi i te Wavelength Division Multiplexing (WDM) hei whakawhānui i te kaha o te muka i runga i te hanganga muka o nāianei. Ko te WDM he hangarau e whakarea ana i ngā tohu whatu maha ki runga i te muka kotahi mā te whakamahi i ngā roangaru rerekē o te mārama taiaho. Ka whakahaerehia he rangahau tere mō ngā mara WDM ki te CWDM me te DWDM. E hangai ana ēnei ki te ariā kotahi o te whakamahi i ngā roangaru maha o te mārama ki runga i te muka kotahi. Engari he pai, he ngoikoretanga hoki ō rāua.
He aha te CWDM?
Ka tautokohia e te CWDM tae atu ki te 18 ngā hongere roangaru e tukuna ana mā te muka i te wā kotahi. Hei whakatutuki i tēnei, ko ngā roangaru rerekē o ia hongere he 20nm te tawhiti. Ka tautokohia e te DWDM tae atu ki te 80 ngā hongere roangaru i te wā kotahi, me te 0.8nm anake te tawhiti o ia hongere. Ka tukuna e te hangarau CWDM he otinga watea me te utu-pai mō ngā tawhiti poto tae atu ki te 70 kiromita. Mō ngā tawhiti i waenga i te 40 me te 70 kiromita, e waru ngā hongere e tautokona ana e te CWDM.
E waru ngā roangaru mō ia muka e tautokohia ana e te pūnaha CWDM, ā, kua hangaia mō ngā whakawhitiwhiti kōrero poto, e whakamahi ana i ngā auau whānui me ngā roangaru e horapa ana i tawhiti.
I te mea ko te CWDM e hangai ana ki te tawhiti hongere 20-nm mai i te 1470 ki te 1610 nm, ka whakamahia i runga i ngā whānuitanga muka tae atu ki te 80km, iti iho rānei, nā te mea kāore e taea te whakamahi i ngā whakakaha whatu me ngā hongere tawhiti nui. Mā tēnei tawhiti whānui o ngā hongere ka taea te whakamahi i ngā whatu utu taurite. Heoi, he iti ake te kaha o ngā hononga me te tawhiti e tautokona ana me te CWDM i te DWDM.
Ko te tikanga, ka whakamahia te CWDM mō ngā tono iti ake te utu, iti ake te kaha (iti iho i te 10G) me ngā tono tawhiti poto ake, ina he mea nui te utu.
Nō nā tata nei, kua tino ōrite ngā utu mō ngā wāhanga CWDM me te DWDM. I tēnei wā, ka taea e ngā roangaru CWDM te kawe i te 10 Gigabit Ethernet me te 16G Fiber Channel, ā, kāore pea e piki ake tēnei kaha ā muri ake nei.
He aha te DWDM?
He rerekē ki te CWDM, ka taea te whakanui ake i ngā hononga DWDM, nō reira, ka taea te whakamahi mō te tuku raraunga i tawhiti atu.
I roto i ngā pūnaha DWDM, he nui ake te kikī o te maha o ngā hongere maha-whakawhiti i te CWDM nā te mea he kikī ake te mokowā roangaru o te DWDM hei whakauru i ngā hongere maha ki runga i te muka kotahi.
Engari mō te tawhiti hongere 20 nm e whakamahia ana i roto i te CWDM (he rite ki te 15 miriona GHz), ka whakamahia e ngā pūnaha DWDM he whānuitanga o ngā tawhiti hongere kua tohua mai i te 12.5 GHz ki te 200 GHz i roto i te C-Band, ā, i ētahi wā ko te L-band.
Ko ngā pūnaha DWDM o ēnei rā e tautoko ana i ngā hongere 96 e wehea ana i te 0.8 nm te tawhiti i roto i te whānuitanga C-Band 1550 nm. Nā tēnei, ka taea e ngā pūnaha DWDM te tuku i te nui o ngā raraunga mā te hononga muka kotahi, nā te mea ka taea e rātou te tākai i ngā roangaru maha atu ki runga i te muka kotahi.
He tino pai te DWDM mō ngā whakawhitiwhitinga tawhiti tae atu ki te 120 km me tua atu nā tōna kaha ki te whakamahi i ngā whakakaha whatu, ka taea te whakakaha i te whānuitanga katoa o te 1550 nm, o te C-band rānei e whakamahia whānuitia ana i roto i ngā tono DWDM. Ka taea e tēnei te wikitoria i ngā whānuitanga roa o te whakaitiiti, te tawhiti rānei, ā, ina whakakahangia e ngā Erbium Doped-Fiber Amplifiers (EDFA), ka taea e ngā pūnaha DWDM te kawe i ngā raraunga nui puta noa i ngā tawhiti roa tae atu ki ngā rau, ki ngā mano rānei kiromita.
Haunga te kaha ki te tautoko i te maha atu o ngā roangaru i te CWDM, ka taea hoki e ngā tūāpapa DWDM te whakahaere i ngā kawa tere teitei ake nā te mea ko te nuinga o ngā kaihoko taputapu kawe whatu o ēnei rā e tautoko ana i te 100G, 200G rānei mō ia roangaru, i te mea kei te whakaaetia e ngā hangarau hou te 400G me tua atu.
Ngā momo ngaru DWDM me CWDM:
He whānui ake te tawhiti o te hongere o te CWDM i te DWDM -- ko te rerekētanga noa o te auau, te roanga ngaru rānei i waenga i ngā hongere whatu e rua e tata ana.
Ko ngā pūnaha CWDM te tikanga ka kawe i ngā roangaru e waru me te tawhiti hongere o te 20 nm i roto i te whatunga hihi mai i te 1470 nm ki te 1610 nm.
I tētahi atu taha, ka taea e ngā pūnaha DWDM te kawe i ngā roangaru 40, 80, 96, tae atu rānei ki te 160 mā te whakamahi i tētahi mokowā whaiti ake 0.8/0.4 nm (whatunga 100 GHz/50 GHz). Ko ngā roangaru DWDM kei waenga i te 1525 nm ki te 1565 nm (C-band), ā, ka taea hoki e ētahi pūnaha te whakamahi i ngā roangaru mai i te 1570 nm ki te 1610 nm (L-band).
Ngā Painga o te CWDM:
1. Utu iti
He iti ake te utu o te CWDM i te DWDM nā te utu taputapu. Ka whakamahia e te pūnaha CWDM ngā taiaho whakamatao, he iti ake te utu i ngā taiaho kāore i whakamataohia e te DWDM. Hei tāpiri, ko te utu o ngā whakawhiti DWDM e whā, e rima rānei ngā wā e nui ake ana i te utu o ā rātou waeine CWDM. Ahakoa ko ngā utu whakahaere o te DWDM he teitei ake i te CWDM. Nō reira, he kōwhiringa pai te CWDM mō te hunga he iti noa te pūtea.
2. Te Hiahiatanga Mana
Ki te whakatauritea ki te CWDM, he nui ake te mana e hiahiatia ana mō te DWDM. Nā te mea e pau ana i ngā taiaho DWDM me ngā ara iahiko aroturuki me te whakahaere tata ki te 4 W mō ia roangaru. I taua wā, e whakamahi ana te tuku taiaho CWDM kāore i whakamataohia i te 0.5 W o te mana. He hangarau kore mahi te CWDM e kore e whakamahi i te mana hiko. He pānga pūtea pai mō ngā kaiwhakahaere ipurangi.
3. Ngāwari te whakahaere
He māmā ake te hangarau e whakamahia ana e ngā pūnaha CWDM ki te DWDM. Ka whakamahia te LED, te Taiaho rānei hei hiko. He iti ake, he iti ake hoki te utu o ngā tātari ngaru o ngā pūnaha CWDM. Nō reira, he ngāwari te tāuta me te whakamahi.
Ngā Painga o te DWDM:
1. Whakapai Ake Ngāwari
He ngāwari, he pakari hoki te DWDM mō ngā momo muka. Ka taea te whakahou ake i te DWDM ki te 16 ngā hongere i runga i ngā muka G.652 me G.652.C. I ahu mai i te meka e whakamahia tonutia ana e te DWDM te rohe ngaronga iti o te muka. Ahakoa ko ngā pūnaha CWDM 16 ngā hongere e whakauru ana i te tuku i roto i te rohe 1300-1400nm, he nui ake te kaha o te whakaiti.
2. Te Whakawhanuitanga
Mā ngā otinga DWDM ka taea te whakapai ake i ngā hongere e waru ki te 40 mōrahi. Ka taea e rātou te whakanui ake i te kaha katoa o te muka i te otinga CWDM.
3. Tawhiti Tuku Roa
Ka whakamahia e te DWDM te roopu roangaru 1550 ka taea te whakanui mā te whakamahi i ngā whakakaha whatu tikanga (EDFA). Ka whakarei ake i te tawhiti tuku ki ngā rau kiromita.
Mā te pikitia e whai ake nei koe e whakaatu ki ngā rerekētanga i waenga i te CWDM me te DWDM.
Wā tuku: Pipiri-14-2022