He aha te muka G.654E?

I ngā tau tata nei, kua whakamahia tētahi momo muka whatu hou, ko G.654E, i roto i ētahi raina tuara tawhiti, ā, kua tutuki ngā hua pai. Nā, he aha te muka whatu G.654E? Ka whakakapia rānei e te muka G.654E te muka G.652D tuku iho?

I waenganui o te tekau tau atu i 1980, hei whakatutuki i ngā whakaritenga whakawhitiwhiti tawhiti o ngā taura muka whatu ruku wai, i whakawhanakehia he muka whatu aratau-kotahi me te matua silica parakore me te roanga ngaru o te 1550 nm. Ko tōna whakaiti tata ki tēnei roanga ngaru he 10% te iti iho i tērā o muka whatu G.652 i runga ake nei.

Ko tēnei momo muka e tautuhia ana ko te muka G.654, ā, ko tōna ingoa i taua wā ko "muka aratau-kotahi whakaitiiti me te roanga ngaru o te 1550 nm".

I ngā tau 1990, ka tīmata te whakamahi i te hangarau WDM i roto i ngā pūnaha whakawhitiwhiti kōrero whatu i raro i te wai. Mā te hangarau WDM ka taea te tuku i ngā hongere whatu maha, tae atu ki ngā rau, i te wā kotahi i runga i te muka whatu kotahi, ā, mā te whakamahi i ngā whakakaha muka whatu, ka honoa ngā tohu whatu maha-roa-ngaru, kaha-teitei ki roto i te muka kotahi, ka honoa ki tētahi atanga iti. Ka whakaatuhia e ēnei tohu ngā āhuatanga kore-raina.

Nā te pānga kore-raina o te muka whatu, ina nui ake te mana whatu e uru ana ki te muka i tētahi uara, ka heke haere te mahi tuku o te pūnaha me te pikinga ake o te mana whatu e uru ana ki te muka.
Ko te pānga kore-rārangi o te muka whatu e pā ana ki te kiato mana whatu o te matua muka. Ina pumau te mana whatu whakauru, mā te whakanui ake i te horahanga whakawhiti whai hua o te muka whatu me te whakaiti i te kiato mana whatu o te matua muka ka taea te whakaiti i te awe o te pānga kore-rārangi ki te mahi tuku. Nō reira, ka tīmata te tautohetohe mō te muka whatu G.654 nā te mea kua piki ake te horahanga whakawhiti whai hua.

Mā te whakanui ake i te horahanga whai hua o te muka ka piki ake te roangaru tapahi, engari me whakahaere te pikinga o te roangaru tapahi kia kore ai e pā ki te whakamahinga o te muka i te roopu C (1530nm ~ 1565nm), nō reira, ka whakatakotoria te roangaru tapahi o te muka G.654 ki te 1530nm.

I te tau 2000, i te wā i whakahoutia ai e te ITU te paerewa muka whatu G.654, i hurihia te ingoa ki te "muka whatu aratau-kotahi kua nekehia te roanga ngaru".

Tae noa mai ki tēnei wā, ko te muka whatu G.654 te mea e kitea ana i te iti o te whakaiti me te whānui o te horahanga whai hua. Nō muri mai, ko te muka whatu G.654 i whakamahia mō te whakawhitiwhiti taura ruku moana i arotauhia kia whakaitihia me te horahanga whai hua, ā, i whanake haere ki ngā wāhanga iti e whā: A, B, C, me D.