Te ine i te whānui o te rārangirēseri whānui-rārangi whaiti
Ko te whānui rārangi o te taiaho whānui-rārangi whaiti, inā koa ko ngā taiaho auau-kotahi, e pā ana ki te whānui o te whānuitanga taiaho (ko te nuinga he haurua te whānui ki te whānui-katoa o te FWHM). He tika ake, ko te whānui o te mātotoru o te kaha o te mara hiko i whakawāteahia ka whakaatuhia i runga i te auau, te tau ngaru, te roanga ngaru rānei. He tino tata te hononga o te whānui rārangi o te taiaho ki te wā, ā, e tohuhia ana e te wā taurite me te roa taurite. Mena ka pāngia te wāhanga e te nekehanga kore here, ka puta he whānui rārangi i te haruru wāhanga, koinei te āhua me te oscillator kore utu. Ko ngā huringa wāhanga e herea ana i roto i te whānuitanga wāhanga iti rawa ka hua ake he 0 whānui rārangi me ētahi taha haruru. Ko te rerekētanga o te roa o te kōhao resonant ka whai wāhi atu ki te whānui rārangi, ā, ka whakawhirinaki ki te wā ine. E tohu ana tēnei kāore e taea e te whānui rārangi anake, e te āhua rānei o te whānuitanga (momo rārangi) te whakarato i ngā mōhiohio katoa mō tete whānuitanga o te taiaho.
He maha ngā tikanga ka taea te whakamahi hei ine i tete whānui rārangi o te taiaho:
Ina nui te ōwehenga o te whānui raina (>10GHz, ina he maha ngā oscillations aratau i roto i ngā kōhao resonant o ngā lasers maha), ka taea te whakamahi i tētahi spectrometer tuku iho e whakamahi ana i te whatanga diffraction hei ine. He tino uaua ki te whiwhi taumira auau teitei mā te whakamahi i tēnei tikanga.
Ko tētahi atu huarahi ko te whakamahi i tētahi tātari auau hei huri i ngā piki me ngā heke o te auau hei tātari kaha. Ka taea e te tātari te noho hei ine taurite kore, hei kōhao tohutoro tino tika rānei. He iti rawa hoki te taumira o tēnei tikanga ine.
3. Ko ngā taiaho auau-kotahi e whakamahi ana i te tikanga whaiaro-heterodyne, e hopu ana i te pao i waenga i te putanga taiaho me ia anō i muri i te taupatupatu auau me te whakaroa.
Ina he rau Hertz te whānui o te rārangi, kāore e whai hua te tikanga heterodyne tuku iho nā te mea he roa te roa o te whakaroa e hiahiatia ana i tēnei wā. Ka taea te whakamahi i tētahi koropiko muka hurihuri me tētahi whakakaha muka ā-roto hei whakaroa.
5. Ka taea te whakatutuki i tētahi taumira tino teitei mā te tuhi i ngā pao o ngā taiaho motuhake e rua. I tēnei wā, he iti iho te haruru o te taiaho tohutoro i tērā o te whakamātautau.rēseri, he rite rānei ngā tohu mahi o ngā mea e rua. Ka taea te whiwhi i te rerekētanga auau inamata mā te whakamahi i tētahi koropiko raka-wāhanga, mā te tatau rānei i runga i ngā tuhinga pāngarau. He tino māmā, he pumau hoki tēnei tikanga, engari me whai i tētahi atu taiaho (e mahi tata ana ki te auau o te taiaho whakamātautau). Mena he whānui rawa te whānuitanga o te whānuitanga o te rārangi ine, he tino watea te whakamahi i tētahi heru auau.
Ko te ine i te auau whatu he tikanga e hiahiatia ana he tohutoro auau (wā rānei) i tētahi wā. Mō te taiaho whānui-rārangi whaiti, kotahi noa te rama tohutoro e hiahiatia ana hei whakarato i tētahi tohutoro tika. Mā te tikanga heterodyne ka whiwhi i te tohutoro auau mā te whakamahi i tētahi whakaroa wā roa mai i te taputapu whakamātautau tonu. Ko te mea pai, ka karohia te ōritetanga wā i waenga i te hihi tuatahi me tōna ake rama whakaroa. Nō reira, ko ngā muka whatu roa te tikanga e whakamahia ana. Heoi, nā te piki me te heke pumau me ngā pānga oro, ka taea e ngā muka whatu roa te whakaputa haruru wāhanga tāpiri.
Wā tuku: Hakihea-08-2025