I tēnei rā, ka whakaurua e mātou he taiaho "kotahi te tae" ki te taumata tino nui – te taiaho whānui-rārangi whaiti. Ko tōna putanga mai ka whakakī i ngā āputa i roto i ngā mara tono maha o te taiaho, ā, i ngā tau tata nei kua whakamahia whānuitia i roto i te kimi ngaru ā-papa, te liDAR, te pūoko tohatoha, te whakawhitiwhiti whatu honohono tere-teitei me ētahi atu mara, he "misioni" e kore e taea te whakaoti mā te whakapai ake i te mana taiaho anake.
He aha te taiaho whānui-rārangi whaiti?
Ko te kupu "whānui rārangi" e pā ana ki te whānui rārangi āwhata o te taiaho i roto i te rohe auau, e inehia ana i runga i te whānui katoa o te haurua-tihi o te āwhata (FWHM). Ko te whānui rārangi te mea nui e pāngia ana e te irahiko ohorere o ngā ngota, ngā katote rānei kua whakaohokia, te haruru ā-wāhanga, te wiri ā-pūkaha o te resonator, te wiri pāmahana me ētahi atu āhuatanga o waho. Ko te iti o te uara o te whānui rārangi, ko te teitei ake o te parakore o te āwhata, arā, ko te pai ake o te kotahi-tae o te taiaho. Ko ngā taiaho me ēnei āhuatanga he iti noa te haruru ā-wāhanga, te auau rānei, ā, he iti noa te haruru kaha whanaunga. I taua wā anō, ko te iti o te uara whānui rārangi o te taiaho, ko te kaha ake o te hononga e rite ana, e whakaatuhia ana hei roa hononga tino roa.
Te whakatinanatanga me te whakamahinga o te taiaho whānui-rārangi whaiti
Nā te whānui o te raina whiwhinga ā-roto o te matū mahi o te taiaho, he mea tata kore e taea te whakatutuki tika i te putanga o te taiaho whānui-raina whaiti mā te whakawhirinaki ki te oscillator tuku iho. Hei whakatutuki i te mahi a te taiaho whānui-raina whaiti, he mea tika kia whakamahia ngā tātari, ngā whao me ētahi atu taputapu hei whakawhāiti, hei tīpako rānei i te modulus roa i roto i te whānuitanga whiwhinga, hei whakanui ake i te rerekētanga whiwhinga kupenga i waenga i ngā aratau roa, kia iti noa iho, kia kotahi noa iho rānei te oscillation aratau roa i roto i te resonator taiaho. I roto i tēnei tukanga, he mea tika kia whakahaere i te awe o te haruru ki te putanga taiaho, me te whakaiti i te whānui o ngā raina hihi i puta mai i te wiri me ngā huringa pāmahana o te taiao o waho; I te wa ano, ka taea hoki te whakakotahi me te tātari i te kiato hihi o te haruru ā-wāhanga, auau rānei kia mārama ai te pūtake o te haruru me te arotau i te hoahoa o te taiaho, kia tutuki ai te putanga pumau o te taiaho whānui-raina whaiti.
Me titiro tātou ki te whakatinanatanga o te mahi whānui-rārangi whaiti o ētahi momo taiaho rerekē.
He pai ngā painga o ngā taiaho hiko-haurua, arā, he iti te rahi, he pai te mahi, he roa te ora, ā, he pai hoki te ōhanga.
Ko te resonator whatu Fabry-Perot (FP) e whakamahia ana i roto i ngā tikanga tuku ihongā taiaho haurua-iraKo te tikanga ka wiriwiri i te aratau maha-roa, ā, he whānui te whānuitanga o te rārangi putanga, nō reira me whakanui ake te urupare whatu kia whiwhi ai i te putanga o te whānui rārangi whaiti.
Ko te urupare tohatoha (DFB) me te whakaata Bragg tohatoha (DBR) he rua ngā taiaho haurua-ā-roto e whakamahia whānuitia ana mō te urupare whatu. Nā te iti o te papa whatu me te pai o te whiriwhiringa roangaru, he ngāwari ki te whakatutuki i te putanga whānui-rārangi whaiti kotahi-auau pumau. Ko te rerekētanga matua i waenga i ngā hanganga e rua ko te tūranga o te whatu: ko te hanganga DFB te tikanga ka tohatoha i te hanganga ā-wā o te whatu Bragg puta noa i te resonator, ā, ko te resonator o te DBR he mea hanga mai i te hanganga whatu whakaata me te rohe whiwhinga kua whakauruhia ki roto i te mata pito. Hei tāpiri, ka whakamahia e ngā taiaho DFB ngā whatu kua whakauruhia me te iti o te rerekētanga taupū whakaata me te iti o te whakaata. Ka whakamahia e ngā taiaho DBR ngā whatu mata me te teitei o te rerekētanga taupū whakaata me te teitei o te whakaata. He nui te whānuitanga o ngā hanganga e rua, ā, ka taea te mahi i te whakatikatika roangaru me te kore e peke aratau i roto i te whānuitanga o ētahi nanometer, kei reira te whānuitanga whakatikatika o te taiaho DBR i teReera DFBHei tāpiritanga, mā te hangarau urupare whatu ā-waho o te kōhao, e whakamahi ana i ngā huānga whatu o waho hei whakahoki i te mārama e puta ana i te maramara taiaho haurua-waenga me te tīpako i te auau, ka taea hoki te whakatutuki i te mahi whānui-rārangi whaiti o te taiaho haurua-waenga.
(2) Ngā reera muka
He nui te pai o te hurihanga papu o ngā taiaho muka, he pai te kounga o te hihi, ā, he pai te pai o te hononga, koinei ngā kaupapa rangahau wera i roto i te mara taiaho. I roto i te horopaki o te ao mōhiohio, he pai te hototahi o ngā taiaho muka ki ngā pūnaha whakawhitiwhiti muka whatu o nāianei kei te mākete. Ko te taiaho muka auau-kotahi me ngā painga o te whānui rārangi whaiti, te iti o te haruru me te pai o te hononga kua noho hei tetahi o ngā huarahi nui o tōna whanaketanga.
Ko te aratau roa kotahi te kaupapa matua o te taiaho muka hei whakatutuki i te putanga whānui-rārangi whaiti, i te nuinga o te wā, e ai ki te hanganga o te resonator, ka taea te wehewehe i te taiaho muka auau kotahi ki te momo DFB, momo DBR me te momo mowhiti. I roto i ēnei, ko te kaupapa mahi o ngā taiaho muka auau-kotahi DFB me DBR he rite ki te kaupapa mahi o ngā taiaho haurua-ira DFB me DBR.
E ai ki te Pikitia 1, ko te tikanga o te resonator muka DFB ko te tuhi i te whatanga Bragg tohatoha ki roto i te muka. Nā te mea ka pāngia te roangaru mahi o te oscillator e te wā muka, ka taea te whiriwhiri i te aratau roa mā te urupare tohatoha o te whatanga. Ko te resonator resonator resonator o te resonator DBR he mea hanga i te nuinga o te wā e te takirua o ngā whatanga muka Bragg, ā, ko te aratau roa kotahi te mea nui e te whatanga muka Bragg he roopu whaiti me te whakaata iti. Heoi, nā te roa o te resonator, te hanganga uaua me te kore o te tikanga wehewehe auau whai hua, ka ngāwari te kōhao porowhita ki te pekepeke aratau, ā, he uaua ki te mahi pumau i roto i te aratau roa pumau mō te wā roa.
Pikitia 1, Ngā hanganga rārangi e rua o te auau kotahingā taiaho muka
Wā tuku: Whiringa-ā-rangi 27-2023