Marama kitea i raro i te 20 femtosecondpūtake taiaho pāorooro ka taea te whakarerekē
Nō nā tata nei, i whakaputahia e tētahi rōpū rangahau nō te UK tētahi rangahau auaha, e kī ana kua angitu tā rātou whakawhanake i tētahi rama kitea iti iho i te 20 femtosecond te taumata megawatt ka taea te whakarerekē.pūtake taiaho pāorooro. Ko tēnei pūtake taiaho pāorooro, tino teremuka rēseriKa taea e te pūnaha te whakaputa i ngā pāorooro me ngā roangaru ka taea te whakarerekē, ngā roanga tino poto, ngā pūngao tae atu ki te 39 nanojoules, me te mana teitei neke atu i te 2 megawatts, e whakatuwhera ana i ngā huarahi tono hou mō ngā mara pēnei i te tirotiro tere rawa, te whakaahua koiora, me te tukatuka ahumahi.
Ko te tino kaupapa o tēnei hangarau ko te whakakotahitanga o ngā tikanga hou e rua: "Gain-Managed nonlinear Amplification (GMNA)" me te "Resonant Dispersive Wave (RDW) emission". I mua, hei whiwhi i ēnei momo pūoro poto-rahi ka taea te whakarerekē, he mea nui, he uaua hoki ngā taiaho titanium-sapphire, ngā whakakaha whatu rānei. Ehara i te mea he utu nui, he matotoru, he uaua hoki te tiaki i ēnei taputapu, engari he iti hoki ngā reiti tāruarua me ngā awhe tautuhinga. Ko te otinga muka-katoa i whakawhanakehia i tēnei wā ehara i te mea ka whakangawari noa i te hoahoa pūnaha engari ka whakaiti nui hoki i ngā utu me te uaua. Ka taea te whakaputa tika i ngā pūoro iti iho i te 20 femtosecond, ka taea te whakarerekē ki te 400 ki te 700 nanometer me tua atu i ngā pūoro mana-teitei i te auau tāruarua teitei o te 4.8 MHz. I tutuki i te tīma rangahau tēnei putanga nui mā te hoahoa pūnaha i hangaia kia tino tika. Tuatahi, i whakamahia e rātou he oscillator muka ytterbium kua maukati-aratau katoa i runga i te whakaata mowhiti whakanui kore-raina (NALM) hei pūtake purapura. Ehara i te mea ka whakarite noa tēnei hoahoa i te pumau mō te wā roa o te pūnaha, engari ka karohia hoki te raruraru whakahekenga o ngā ngongo whakakīkī ā-tinana. Whai muri i te whakanui i mua me te pēhitanga o te pā, ka whakaurua ngā pā purapura ki te wāhanga GMNA. Ka whakamahia e te GMNA te whakarerekētanga ā-wāhanga-ake me te tohatoha whiwhinga ā-roa kore taurite i roto i ngā muka whatu hei whakatutuki i te whānui o te hihi me te whakaputa i ngā pā poto rawa me te tangi rārangi tata tino tika, ka pēhia ki raro iho i te 40 femtoseconds mā roto i ngā takirua kume. I te wāhanga whakaputa RDW, i whakamahia e ngā kairangahau ngā muka matua-kore-pā iwa-whakaoho i hangaia e rātou anō, ā, i hangaia hoki. He tino iti te ngaronga o tēnei momo muka whatu i roto i te roopu pā papu me te rohe mārama e kitea ana, e āhei ai te huri pai i te pūngao mai i te papu ki te ngaru marara me te karo i te pokanoa i puta mai i te roopu pā nui-ngaronga. I raro i ngā āhuatanga tino pai, ka taea e te kaha o te pā o te ngaru marara e puta mai ana i te pūnaha te eke ki te 39 nanojoules, ko te whānui o te pā poto rawa ka eke ki te 13 femtoseconds, ko te kaha tihi ka eke ki te 2.2 megawatts, ā, ko te pai o te hurihanga pūngao ka eke ki te 13%. He mea whakahihiri ake anō ko te whakarerekē i te pēhanga hau me ngā tawhā muka, ka taea te whakawhānui ngāwari i te pūnaha ki ngā roopu ultraviolet me te infrared, ka tutuki ai te whakatikatika whānui mai i te ultraviolet hohonu ki te infrared.
Ehara i te mea he mea nui noa iho tēnei rangahau i roto i te mara taketake o te photonics, engari ka whakatuwherahia hoki he āhuatanga hou mō ngā mara ahumahi me ngā mara tono. Hei tauira, i roto i ngā mara pēnei i te whakaahua karuārai maha-photon, te tirotiro tere-wā-whakaoti tere, te tukatuka rauemi, te rongoā tika, me te rangahau whatu kore-raina tere, ka whakaratohia e tēnei momo puna mārama tere-whakaoti hou he taputapu me te ngāwari onge ki ngā kaiwhakamahi. Ina koa i roto i ngā horopaki e hiahia ana ki ngā reiti tāruarua teitei, te mana tihi me ngā pāoro poto-poto, he tino whakataetae ake tēnei hangarau, ā, he nui ake te kaha ki te whakatairanga i whakaritea ki ngā pūnaha whakanui taitanium-sapphire tuku iho, ki ngā pūnaha whakanui whatu tawhā rānei.
I te heke mai, kei te whakamahere te tīma rangahau ki te whakapai ake i te pūnaha, pērā i te whakauru i te hoahoa o nāianei kei roto ngā wāhanga whatu mokowā-kore maha ki roto i ngā muka whatu, te whakamahi rānei i tētahi ohiroa Mamyshev kotahi hei whakakapi i te huinga ohiroa me te whakakaha o nāianei, kia tutuki ai te whakaiti me te whakauru o te pūnaha. Hei tāpiri, mā te urutau ki ngā momo muka ārai-orooro rerekē, te whakauru i ngā hau hohe Raman me ngā kōwae whakarea auau, e tumanakohia ana ka whakawhānuihia tēnei pūnaha ki tētahi awhe whānui ake, ka whakarato i ngā otinga taiaho muka-katoa, awhe whānui, tino tere mō ngā mara maha pērā i te hihi ultraviolet, te mārama e kitea ana me te hihi infrared.
Pikitia 1. Kauwhata hoahoa o te whakatikatika o te taiaho pao
Wā tuku: Mei-28-2025