He aha terēseri whānui-rārangi whaiti?
He whānui rārangi whaiti te taiaho, Ko te kupu "whānui rārangi" e pā ana ki te whānui rārangi hihiko o terēserii roto i te rohe auau, e inehia ana i runga i te whānui katoa o te haurua-tihi o te whānuitanga (FWHM). Ko te whānui raina 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 raina, ko te teitei ake o te parakore o te whānuitanga, 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 haruru auau rānei, ā, he iti noa te haruru kaha whanaunga. I taua wā anō, ko te iti o te uara whānui raina 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 Laser) me te whakaata Bragg tohatoha (DBR) he rua ngā laser semiconductor urupare whatu ā-roto noa. Nā te iti o te papa whatu me te pai o te whiriwhiringa roangaru, he ngāwari ki te whakatutuki i te putanga whānui raina whaiti kotahi-auau pumau. Ko te rerekētanga matua i waenga i ngā hanganga e rua ko te tūranga o te whatu: ko te hanganga Laser DFB 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 i te hanganga whatu whakaata me te rohe whiwhinga kua whakauruhia ki te mata pito. Hei tāpiri, ka whakamahia e ngā laser DFB ngā whatu kua whakauruhia me te iti o te rerekētanga taupū whakaata me te iti o te whakaata. Ka whakamahia e ngā laser 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 laser 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 runga i 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 te taiaho muka auau-kotahi DFB me te DBR he rite ki te DFB me te DBR semiconductor lasers.
I te tau 1960, ko te reihi rupi tuatahi o te ao he reihi totoka, he nui te kaha whakaputa me te whānui o te roangaru. Nā te hanganga ā-wāhi ahurei o te reihi totoka ka ngāwari ake te hoahoa i te putanga whānui-rārangi whaiti. I tēnei wā, ko ngā tikanga matua kua whakatinanahia ko te tikanga kōhao poto, te tikanga kōhao mowhiti kotahi-ara, te tikanga paerewa kōhao roto, te tikanga kōhao aratau pendulum torsion, te tikanga kutikuti Bragg rōrahi me te tikanga weronga purapura.
Wā tuku: Pipiri-03-2025