Hangarau Taiaho Whānui Raina Whāiti Wāhanga Tuarua
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.
E whakaatu ana te Pikitia 7 i te hanganga o ētahi taiaho āhua-totoka aratau-kotahi-roa.
E whakaatu ana te Pikitia 7(a) i te kaupapa mahi o te kōwhiringa aratau roa kotahi i runga i te paerewa FP i roto i te kōhao, arā, ko te whānuitanga tuku raina whaiti o te paerewa e whakamahia ana hei whakanui ake i te ngaronga o ētahi atu aratau roa, kia tātarihia ai ētahi atu aratau roa i roto i te tukanga whakataetae aratau nā te iti o te tuku, kia tutuki ai te mahi aratau roa kotahi. Hei tāpiri, ka taea te whiwhi i tētahi whānuitanga o te putanga whakatikatika roangaru mā te whakahaere i te Koki me te pāmahana o te paerewa FP me te whakarerekē i te wā aratau roa. E whakaatu ana te Pikitia 7(b) me te (c) i te oscillator mowhiti kore-papa (NPRO) me te tikanga kōhao aratau pendulum torsional e whakamahia ana hei whiwhi i tētahi putanga aratau roa kotahi. Ko te kaupapa mahi ko te hanga i te hihi kia horapa i te ahunga kotahi i roto i te resonator, kia whakakorea pai te tohatoha ā-wāhi kore taurite o te maha o ngā matūriki kua hurihia i roto i te kōhao ngaru tū noa, ā, kia karohia ai te awe o te pānga tahunga kōhao ā-wāhi kia tutuki ai tētahi putanga aratau roa kotahi. He rite te mātāpono o te kōwhiringa aratau papatipu Bragg grating (VBG) ki te mātāpono o ngā taiaho whānui-rārangi whāiti me te muka i whakahuatia i mua ake nei, arā, mā te whakamahi i te VBG hei huānga tātari, i runga i tōna kōwhiringa hiato pai me te kōwhiringa koki, ka oioi te oscillator i tētahi roangaru motuhake, i tētahi roopu rānei hei whakatutuki i te tūranga o te kōwhiringa aratau roa, e whakaaturia ana i te Pikitia 7(d).
I taua wā anō, ka taea te whakakotahi i ētahi tikanga whiriwhiri aratau roa kia rite ki ngā hiahia hei whakapai ake i te tika o te kōwhiringa aratau roa, hei whakawhāiti ake i te whānui raina, hei whakanui ake rānei i te kaha o te whakataetae aratau mā te whakauru i te huringa auau kore-raina me ētahi atu tikanga, me te whakawhānui ake i te roangaru putanga o te taiaho i te wā e mahi ana i roto i te whānui raina whaiti, he mea uaua ki te mahi mōrēhia haurua-iramengā taiaho muka.
(4) Reera Parauri
Ko te hangarau whakaputa whānui-rārangi iti te pūtake o te taiaho Brillouin, arā, ko te pānga marara Brillouin whakaohooho (SBS), he iti te haruru, he whaiti hoki te whānuitanga o te raina. Ko tōna kaupapa matua ko te whakamahi i te photon me te mara oro ā-roto hei whakaputa i tētahi nekehanga auau o ngā photon Stokes, ā, ka whakanuia tonutia i roto i te whānuitanga o te whiwhinga.
E whakaatu ana te Pikitia 8 i te hoahoa taumata o te tahuritanga SBS me te hanganga taketake o te taiaho Brillouin.
Nā te iti o te auau wiri o te mara oro, ko te nekehanga auau Brillouin o te rauemi he 0.1-2 cm-1 noa iho, nō reira, me te rama pūwero 1064 nm, ko te roangaru Stokes e whakaputaina ana he 1064.01 nm noa iho, engari ko te tikanga hoki he tino teitei te whai huatanga o tōna huringa matū (tae atu ki te 99.99% i roto i te ariā). Hei tāpiri, nā te mea ko te whānui raina whiwhi Brillouin o te reo he rite tonu ki te MHZ-ghz (ko te whānui raina whiwhi Brillouin o ētahi reo totoka he 10 MHz noa iho), he iti iho i te whānui raina whiwhi o te matū mahi pūwero o te 100 GHz, nō reira, ka taea e te Stokes i whakaohokia i roto i te pūwero Brillouin te whakaatu i te āhuatanga whakawhāiti irahiko i muri i te whakanui maha i roto i te kōhao, ā, ko te whānui raina putanga he maha ngā whakawhāiti i te whānui raina pūwero. I tēnei wā, kua noho te taiaho Brillouin hei wāhi rangahau i roto i te mara o te photonics, ā, he maha ngā pūrongo kua puta mō te raupapa Hz me te iti iho i te Hz o te putanga whānui raina tino whaiti.
I ngā tau tata nei, kua puta ake ngā taputapu Brillouin me te hanganga arataki ngaru i roto i te mara ongā taputapu whakaahua ngaruiti, ā, kei te tere haere te whanaketanga ki te huarahi ki te whakaitiiti, te whakaurunga teitei me te taumira teitei ake. Hei tāpiri, kua uru atu hoki te taiaho Brillouin e rere ana i te wāhi i runga i ngā rauemi tioata hou pēnei i te taimana ki te tirohanga a te tangata i ngā tau e rua kua pahure ake nei, ko tana putanga auaha i roto i te mana o te hanganga arataki ngaru me te aukati SBS cascade, te mana o te taiaho Brillouin ki te 10 W te rahi, e whakatakoto ana i te turanga mo te whakawhānui ake i tana tono.
Te hononga whānui
I te haere tonu o te tūhuratanga o ngā mātauranga hou, kua noho ngā taiaho whānui-rārangi whaiti hei taputapu nui i roto i te rangahau pūtaiao me ā rātou mahi tino pai, pērā i te ine taiaho LIGO mō te kimi ngaru ā-papa, e whakamahi ana i te whānui-rārangi whaiti auau-kotahi.rēserime te roangaru o te 1064 nm hei pūtake purapura, ā, ko te whānui o te rama purapura kei roto i te 5 kHz. Hei tāpiri, ko ngā taiaho whānui-whaiti me te taea te whakarerekē i te roangaru me te kore peke aratau e whakaatu ana i te kaha tono nui, inā koa i roto i ngā whakawhitiwhiti kōrero honohono, ka taea te whakatutuki pai i ngā hiahia o te whakarea wehenga roangaru (WDM) te whakarea wehenga auau rānei (FDM) mō te whakarerekētanga roangaru (auau rānei), ā, e matapaetia ana ka noho hei taputapu matua o te whakatupuranga e whai ake nei o te hangarau whakawhitiwhiti kōrero pūkoro.
I ngā rā kei te heke mai, mā te auahatanga o ngā rauemi taiaho me te hangarau tukatuka ka whakatairanga ake i te pēhanga o te whānui raina taiaho, te whakapai ake i te pumau o te auau, te whakawhānui ake i te whānuitanga o te roangaru me te whakapai ake i te mana, ka whakatakoto i te ara mō te tūhuratanga tangata ki te ao ngaro.
Wā tuku: Whiringa-ā-rangi 29-2023