Ukadaulo wa laser wa ultrafast wafer wochita bwino kwambiri

Wafer wothamanga kwambiri wa ultrafastukadaulo wa laser
Mphamvu yapamwambama laser othamanga kwambiriamagwiritsidwa ntchito kwambiri popanga zinthu zapamwamba, zidziwitso, zamagetsi ang'onoang'ono, mankhwala achilengedwe, chitetezo cha dziko ndi magulu ankhondo, ndipo kafukufuku wofunikira wasayansi ndi wofunikira kwambiri polimbikitsa luso la sayansi ndi ukadaulo wa dziko komanso chitukuko chapamwamba.dongosolo la laserChifukwa cha ubwino wake wa mphamvu yapakati, mphamvu yayikulu ya kugunda kwa mtima ndi khalidwe labwino la kuwala, ikufunika kwambiri mu fizikisi ya attosecond, kukonza zinthu ndi magawo ena asayansi ndi mafakitale, ndipo yakhala ikukhudzidwa kwambiri ndi mayiko padziko lonse lapansi.
Posachedwapa, gulu lofufuza ku China lagwiritsa ntchito wafer module yodzipangira yokha komanso ukadaulo wowonjezera mphamvu kuti likwaniritse magwiridwe antchito apamwamba (kukhazikika kwambiri, mphamvu yayikulu, kuwala kwapamwamba, kugwira ntchito bwino kwambiri) wafer yothamanga kwambirilaserkutulutsa. Kudzera mu kapangidwe ka cholumikizira chobwezeretsanso mphamvu ndi kuwongolera kutentha kwa pamwamba ndi kukhazikika kwa makina a kristalo ya disc m'chimbudzi, kutulutsa kwa laser kwa mphamvu imodzi ya pulse >300 μJ, m'lifupi mwa pulse <7 ps, mphamvu yapakati >150 W kumatheka, ndipo mphamvu yayikulu kwambiri yosinthira kuwala ikhoza kufika pa 61%, yomwe ndi mphamvu yapamwamba kwambiri yosinthira kuwala yomwe yanenedwa mpaka pano. Mphamvu ya beam factor M2 <1.06@150W, kukhazikika kwa maola 8 RMS <0.33%, izi zikuwonetsa kupita patsogolo kofunikira mu laser ya wafer ya ultrafast yogwira ntchito kwambiri, yomwe ipereka mwayi wambiri wogwiritsa ntchito laser yamphamvu kwambiri.

Kubwerezabwereza kwakukulu, njira yowonjezera mphamvu ya wafer yokonzanso
Kapangidwe ka wafer laser amplifier kakuwonetsedwa pa Chithunzi 1. Kali ndi gwero la mbewu ya ulusi, mutu woonda wa laser ndi kabowo ka regenerative amplifier. Chojambulira cha ulusi chokhala ndi ytterbium chokhala ndi mphamvu yapakati ya 15 mW, kutalika kwa mafunde apakati a 1030 nm, m'lifupi mwa pulse wa 7.1 ps ndi liwiro lobwerezabwereza la 30 MHz chinagwiritsidwa ntchito ngati gwero la mbewu. Mutu wa wafer laser umagwiritsa ntchito kristalo ya Yb: YAG yopangidwa kunyumba yokhala ndi mainchesi a 8.8 mm ndi makulidwe a 150 µm ndi makina opopera a 48-stroke. Gwero la pampu limagwiritsa ntchito mzere wa zero-phonon LD wokhala ndi mafunde a 969 nm lock, zomwe zimachepetsa vuto la quantum kufika pa 5.8%. Kapangidwe kapadera koziziritsira kakhoza kuziziritsa bwino kristalo ya wafer ndikutsimikizira kukhazikika kwa kabowo ka regenerative. Kabowo ka regenerative amplifier kamakhala ndi maselo a Pockels (PC), Thin Film Polarizers (TFP), Quarter-Wave Plates (QWP) ndi resonator yokhazikika kwambiri. Zoyezera kuwala zimagwiritsidwa ntchito poletsa kuwala kowonjezereka kuti kusawononge gwero la mbewu. Kapangidwe ka zoyezera komwe kali ndi TFP1, Rotator ndi Half-Wave Plates (HWP) kamagwiritsidwa ntchito kupatula mbewu zolowera ndi ma pulse owonjezereka. Mpweya wa mbewu umalowa mu chipinda chowonjezera mphamvu kudzera mu TFP2. Makristalo a Barium metaborate (BBO), PC, ndi QWP amaphatikizana kupanga chosinthira cha kuwala chomwe chimagwiritsa ntchito mphamvu yamagetsi nthawi ndi nthawi ku PC kuti chigwire bwino mpweya wa mbewu ndikuwufalitsa m'malo otseguka. Mpweya womwe ukufunidwa umasinthasintha m'malo otseguka ndipo umakulitsidwa bwino panthawi yofalikira yozungulira posintha bwino nthawi yopanikizika ya bokosilo.
Chojambulira cha wafer regeneration amplifier chikuwonetsa ntchito yabwino yotulutsa ndipo chidzakhala ndi gawo lofunika kwambiri m'magawo opanga zinthu zapamwamba monga extreme ultraviolet lithography, attosecond pump source, 3C electronics, ndi magalimoto atsopano amphamvu. Nthawi yomweyo, ukadaulo wa wafer laser ukuyembekezeka kugwiritsidwa ntchito pamagetsi akuluakulu amphamvu kwambiri.zipangizo za laser, kupereka njira yatsopano yoyesera yopangira ndi kuzindikira bwino zinthu pa sikelo ya nanoscale space ndi femtosecond time scale. Cholinga chake ndikutumikira zosowa zazikulu za dzikolo, gulu la polojekitiyi lipitiliza kuyang'ana kwambiri pakupanga ukadaulo wa laser, kupititsa patsogolo kukonzekera makristasi amphamvu kwambiri a laser, ndikupititsa patsogolo bwino kafukufuku wodziyimira pawokha komanso luso la chitukuko cha zida za laser m'magawo azidziwitso, mphamvu, zida zapamwamba ndi zina zotero.