He pakaruhanga! Ko te mana teitei o te ao 3 μm waenganui-infraredtaiaho muka femtosecond
taiaho mukaki te whakatutuki i te putanga taiaho waenganui-infrared, ko te taahiraa tuatahi ko te kowhiri i nga rauemi matrix muka e tika ana. I roto i nga lasers muka infrared tata, ko te whariki karaihe kiripaka te mea tino noa o te papanga muka me te iti o te mate tuku, te kaha miihini pono me te tino pai. Heoi, na te kaha o te phonon (1150 cm-1), kaore e taea te whakamahi te muka kiripaka mo te whakawhiti laser infrared-waenganui. Ki te whakatutuki i te tuku mate iti o te taiaho waenganui-pokarere, me whiriwhiri ano tatou i etahi atu rauemi matrix muka me te iti o te kaha o te phonon, penei i te matrix sulfide glass matrix fluoride matrix. Ko te muka sulfide te iti rawa o te kaha o te phonon (mo te 350 cm-1), engari ko te raru kaore e taea te whakanui ake i te kukū doping, na reira kaore e pai mo te whakamahi hei muka taonga hei whakaputa i te laser infrared-waenganui. Ahakoa he iti ake te kaha o te phonon (550 cm-1) o te tïpako karaehe fluoride (550 cm-1) i te tïpako karaihe sulfide, ka taea hoki e ia te tuku iti-mate mo nga lasers infrared-waenganui me nga roangaru iti iho i te 4 μm. Ko te mea nui ake, ka taea e te tïpako karaehe fluoride te whakatutuki i te kukū katote katote whenua onge nui, ka taea te whiwhi i te taonga e hiahiatia ana mo te whakatipuranga taiaho waenga-infrared, hei tauira, ko te muka ZBLAN fluoride tino pakeke mo Er3 + kua kaha ki te whakatutuki i te kukū doping o ki te 10 mol. Na reira, ko te matrix karaihe fluoride te mea tino pai mo nga laser muka infrared-waenganui.
I tata nei, i whakawhanakehia e te roopu a Ahorangi Ruan Shuangchen me Ahorangi Guo Chunyu i te Whare Wananga o Shenzhen he femtohakona teitei.laser muka pupuhicomposed of 2.8μm aratau-maukati Er:ZBLAN muka oscillator, kotahi-aratau Er:ZBLAN muka preamplifier me nui-aratau mara Er:ZBLAN muka tīwerawera matua.
I runga i te ariā-whaiaro me te whakakaha ake o te putere-poto-poto-poipoi-waewae e whakahaerehia ana e te ahua polarization me te mahi whaihanga tau o to tatou roopu rangahau, me te pehi kore raina me nga tikanga whakahaere aratau o te muka whatu aratau nui, te hangarau whakamahana kaha me te whakakaha. hanganga o te papu rua-mutunga, te pūnaha whiwhi 2.8μm ultra-poto putanga pulse ki te mana toharite o 8.12W me te whanui pulse o 148 fs. Ko te rekoata o te ao mo te mana toharite teitei i taea e tenei roopu rangahau i whakahoutia ano.
Whakaahua 1 Te hoahoa hoahoa o Er:ZBLAN muka laser i runga i te hanganga MOPA
Ko te hanganga o tetaiaho femtosecondKei te whakaatuhia te punaha i te Whakaahua 1. Ko te kotahi-aratau takirua Er: ZBLAN muka o 3.1 m te roa i whakamahia hei muka whiwhi i roto i te preamplifier me te kukū doping o 7 mol.% me te diameter matua o 15 μm (NA = 0.12). I roto i te whakakaha matua, he rua kakahu aratau nui mara Er: ZBLAN muka ki te roa o te 4 m i whakamahia rite te muka taonga ki te kukū doping o 6 mol.% me te diameter matua o 30 μm (NA = 0.12). Ko te diameter matua nui ake ka iti ake te whakarea-kore o te muka taonga, ka taea te tu atu i te mana teitei ake me te whakaputanga o te pupuhi o te kaha o te hiko. Ka honoa nga pito e rua o te muka whiwhi ki te potae tauranga AlF3.
Wā tuku: Feb-19-2024