Hangarau pūtake taiaho mō te pūoko muka whatu Wāhanga Tuarua
2.2 Te whāwhā roangaru kotahipūtake laser
Ko te whakatinanatanga o te whitinga ngaru kotahi o te taiaho he mea nui ki te whakahaere i ngā āhuatanga ā-tinana o te taputapu i roto i terēserite kōhao (ko te roangaru waenga o te whānui whakahaere te tikanga), kia tutuki ai te whakahaere me te whiriwhiri i te aratau roa hurihuri i roto i te kōhao, kia tutuki ai te kaupapa o te whakatikatika i te roangaru putanga. I runga i tēnei mātāpono, mai i te tekau tau atu i 1980, ko te whakatinanatanga o ngā reera muka whakatikatika i tutukihia mā te whakakapi i te mata pito whakaata o te reera ki te whatanga whakaata, me te whiriwhiri i te aratau kōhao reera mā te hurihuri ā-ringa me te whakatikatika i te whatanga whakatikatika. I te tau 2011, i whakamahia e Zhu me ētahi atu ngā tātari whakatikatika hei whakatutuki i te putanga reera whakatikatika kotahi-ngaru me te whānui raina whaiti. I te tau 2016, i whakamahia te tikanga kōpeketanga whānui raina Rayleigh ki te kōpeketanga roangaru rua, arā, i whakamahia te ahotea ki te FBG hei whakatutuki i te whakatikatika reera rua-ngaru, ā, i aroturukitia te whānui raina reera putanga i te wā kotahi, ka whiwhi i te whānuitanga whakatikatika roangaru o te 3 nm. Putanga pumau rua-ngaru me te whānui raina o te 700 Hz. I te tau 2017, i whakamahia e Zhu me ētahi atu... I whakamahia te graphene me te muka micro-nano Bragg grating hei hanga i tētahi tātari whatu-katoa, ā, i honoa ki te hangarau whakawhāiti taiaho Brillouin, i whakamahia te pānga photothermal o te graphene tata ki te 1550 nm hei whakatutuki i te whānui raina taiaho iti iho i te 750 Hz me te matawai tere me te tika e whakahaeretia ana e te whakaahua o te 700 MHz/ms i te awhe roanga ngaru o te 3.67 nm. E whakaatuhia ana i te Pikitia 5. Ko te tikanga whakahaere roanga ngaru i runga ake nei ka whakatinana i te kōwhiringa aratau taiaho mā te whakarerekē tika, ā-kore rānei i te roanga ngaru pokapū passband o te taputapu i roto i te kōhao taiaho.
Pikitia 5 (a) Te whakatakotoranga whakamātautau o te roangaru ka taea te whakahaere i te whatu-taiaho muka whakarerekēme te pūnaha ine;
(b) Ngā ira putanga i te putanga 2 me te whakarei ake i te papu whakahaere
2.3 Pūtake mārama taiaho mā
He maha ngā wāhanga o te whanaketanga o te pūtake mārama mā, pērā i te rama halogen tungsten, te rama deuterium,rēhia haurua-irame te pūtake māramatanga supercontinuum. Ina koa, ko te pūtake māramatanga supercontinuum, i raro i te whakaoho o ngā pāoro femtosecond, picosecond rānei me te mana whakawhiti nui, ka puta he pānga kore-raina o ngā momo raupapa i roto i te arataki ngaru, ā, ka whānui haere te whānuitanga, ka taea te kapi i te roopu mai i te māramatanga kitea ki te infrared tata, ā, he kaha te hononga. Hei tāpiri, mā te whakarerekē i te marara me te kore-raina o te muka motuhake, ka taea te whakawhānui i tōna whānuitanga ki te roopu infrared-waenga. Kua whakamahia nuitia tēnei momo pūtake laser i roto i ngā mara maha, pērā i te tomography hononga whatu, te kimi hau, te whakaahua koiora me ētahi atu. Nā te herenga o te pūtake māramatanga me te reo kore-raina, ko te whānuitanga supercontinuum o mua i hangaia e te karāhe whatu papu laser totoka hei whakaputa i te whānuitanga supercontinuum i roto i te awhe kitea. Mai i taua wā, kua piki haere te muka whatu hei reo pai mō te whakaputa i te supercontinuum whānui nā te mea he nui te tauwehenga kore-raina me te iti o te mara aratau tuku. Ko ngā pānga matua kore-raina ko te whakaranu ngaru-whā, te kore pumau o te whakarerekētanga, te whakarerekētanga ā-wāhanga-ake, te whakarerekētanga ā-wāhanga-whiti, te wehewehenga soliton, te marara Raman, te nekehanga auau-ake soliton, me ētahi atu, ā, he rerekē anō hoki te ōwehenga o ia pānga i runga i te whānui o te pā o te pā whakaoho me te marara o te muka. I te nuinga o te wā, ko te pūtake mārama supercontinuum te kaupapa matua ki te whakapai ake i te mana taiaho me te whakawhānui i te whānuitanga o te hihi, me te aro ki tōna whakahaere hononga.
3 Whakarāpopototanga
E whakarāpopoto ana tēnei pepa, e arotake ana hoki i ngā pūtake taiaho e whakamahia ana hei tautoko i te hangarau pūoko muka, tae atu ki te taiaho whānui-rārangi whaiti, te taiaho auau kotahi ka taea te whakarerekē me te taiaho mā whānui. Ka whakamāramahia ngā whakaritenga tono me te tūnga whanaketanga o ēnei taiaho i roto i te mara o te pūoko muka. Mā te tātari i ō rātou whakaritenga me te tūnga whanaketanga, ka whakatauhia ko te pūtake taiaho pai mō te pūoko muka ka taea te whakatutuki i te putanga taiaho tino whaiti me te tino pumau i tetahi roopu me tetahi wā. Nō reira, ka tīmata tātou me te taiaho whānui-rārangi whaiti, te taiaho whānui-rārangi whaiti ka taea te whakarerekē me te taiaho mārama mā me te whānui-whānui whiwhinga, ā, ka kitea he huarahi whai hua hei whakatutuki i te pūtake taiaho pai mō te pūoko muka mā te tātari i ō rātou whanaketanga.
Wā tuku: Whiringa-ā-rangi 21-2023