He putanga hou! Ko te mana teitei rawa atu o te ao, 3 μm te waenga-wherotaiaho muka femtosecond
muka taiahoHei whakatutuki i te putanga o te reera waenga-infrared, ko te taahiraa tuatahi ko te whiriwhiri i te rauemi matihiko muka e tika ana. I roto i ngā reera muka tata-infrared, ko te matihiko karāhe kuata te rauemi matihiko muka tino noa me te iti rawa o te mate tuku, te kaha miihini pono me te pumau pai. Heoi, nā te nui o te kaha phonon (1150 cm-1), kāore e taea te whakamahi i te muka kuata mō te tuku reera waenga-infrared. Hei whakatutuki i te iti o te mate tuku o te reera waenga-infrared, me whiriwhiri anō tātou i ētahi atu rauemi matihiko muka me te iti o te kaha phonon, pērā i te matihiko karāhe whanariki, te matihiko karāhe fluoride rānei. Ko te muka whanariki te iti rawa o te kaha phonon (tata ki te 350 cm-1), engari he raruraru kāore e taea te whakanui ake i te kukū doping, nō reira kāore e pai mō te whakamahi hei muka whakanui hei whakaputa reera waenga-infrared. Ahakoa he paku teitei ake te kaha phonon o te papa karāhe fluoride (550 cm-1) i te papa karāhe whanariki, ka taea hoki e ia te whakatutuki i te iti o te mate tuku mō ngā reera waenga-infrared me ngā roangaru iti iho i te 4 μm. He mea nui ake, ka taea e te papa karaihe fluoride te whakatutuki i te kukū whakakī katote whenua onge teitei, ka taea te whakarato i te whiwhinga e hiahiatia ana mō te whakaputanga taiaho waenga-infrared, hei tauira, ko te muka ZBLAN fluoride tino pakari mō Er3+ kua taea te whakatutuki i te kukū whakakī tae atu ki te 10 mol. Nō reira, ko te matrix karaihe fluoride te rauemi matrix muka tino pai mō ngā taiaho muka waenga-infrared.
Nō nā tata nei, i whakawhanakehia e te tīma o Ahorangi Ruan Shuangchen rāua ko Ahorangi Guo Chunyu i Te Whare Wānanga o Shenzhen tētahi inenga mana-teitei o te femtosecondtaiaho muka pāterehe mea tito mai i te oscillator muka Er:ZBLAN raka-aratau 2.8μm, te whakakaha muka mua Er:ZBLAN aratau-kotahi me te whakakaha matua muka Er:ZBLAN mara-nui.
I runga i te ariā pēhanga-ā-roto me te whakanui i te pāorooro poto-waenga-whero e whakahaerehia ana e te āhua pōraritanga me te mahi whakatauira tau a tā mātou rōpū rangahau, me te whakakotahitanga o ngā tikanga pehi kore-raina me te whakahaere aratau o te muka whatu aratau-nui, te hangarau whakamatao hohe me te hanganga whakanui o te papu pito-rua, ka whiwhi te pūnaha i te putanga pāorooro poto-rua 2.8μm me te mana toharite o te 8.12W me te whānui pāorooro o te 148 fs. I whakahoutia anō te rekoata o te ao mō te mana toharite teitei rawa atu i tutukihia e tēnei rōpū rangahau.
Ahua 1 Te hoahoa hanganga o te muka laser Er:ZBLAN i runga i te hanganga MOPA
Te hanganga o tetaiaho femtosecondKei te whakaatuhia te pūnaha i te Pikitia 1. Ko te muka Er:ZBLAN takirua-aratau kotahi, 3.1 m te roa, i whakamahia hei muka whakanui i roto i te whakakaha o mua me te kukū tāpiri o te 7 mol.% me te diameter matua o te 15 μm (NA = 0.12). I roto i te whakakaha matua, i whakamahia he muka Er:ZBLAN aratau nui, takirua-aratau, 4 m te roa, hei muka whakanui me te kukū tāpiri o te 6 mol.% me te diameter matua o te 30 μm (NA = 0.12). Nā te diameter matua nui ake, he iti ake te tauwehenga kore-raina o te muka whakanui, ā, ka taea te tu atu i te mana tihi teitei me te putanga pā o te kaha pā nui ake. Ka honoa ngā pito e rua o te muka whakanui ki te taupoki pito AlF3.
Te wā tuku: 19-Pepuere-2024