Ukusebenza okuphezulu kwe-ultrafast waferubuchwepheshe be-laser
Amandla aphezuluama-laser asheshayozisetshenziswa kabanzi ekukhiqizeni okuthuthukile, ulwazi, i-microelectronics, i-biomedicine, ukuvikela kuzwelonke kanye nezinkundla zempi, futhi ucwaningo olufanele lwesayensi lubalulekile ukuze kuthuthukiswe ukuqanjwa kabusha kwesayensi nobuchwepheshe kanye nentuthuko yezinga eliphezulu. Ucezu oluncaneuhlelo lwe-laserngezinzuzo zayo zamandla aphakathi nendawo, amandla amakhulu okushaya kwenhliziyo kanye nekhwalithi ye-beam enhle kakhulu inesidingo esikhulu ku-attosecond physics, ukucubungula impahla kanye neminye imikhakha yesayensi nezimboni, futhi iye yakhathazwa kabanzi ngamazwe emhlabeni jikelele.
Muva nje, ithimba labacwaningi e-China lisebenzise imojula ye-wafer ethuthukisiwe kanye nobuchwepheshe bokukhulisa kabusha ukukhulisa ukusebenza kahle (ukuzinza okuphezulu, amandla aphezulu, ikhwalithi ephezulu ye-beam, ukusebenza kahle okuphezulu) i-wafer esheshayolaserokukhiphayo. Ngokuklanywa kwe-regeneration amplifier cavity kanye nokulawulwa kwezinga lokushisa elingaphezulu kanye nokuzinza kwemishini yekristalu ye-disc emgodini, ukuphuma kwe-laser kwamandla we-pulse eyodwa> 300 μJ, ububanzi be-pulse <7 ps, amandla isilinganiso> 150 W kufinyelelwa. , futhi ukusebenza kahle okuphezulu kakhulu kokuguqula ukukhanya kuya ekukhanyeni kungafinyelela ku-61%, okuphinde kube nokusebenza kahle okuphezulu kakhulu kokuguqulwa kwe-optical okubikiwe kuze kube manje. I-beam quality factor M2<1.06@150W, 8h stability RMS<0.33%, le mpumelelo iphawula inqubekelaphambili ebalulekile ekusebenzeni okuphezulu kwe-ultrafast wafer laser, ezohlinzeka ngamathuba engeziwe wezinhlelo zokusebenza ze-laser ezinamandla aphezulu.
Imvamisa yokuphindaphinda okuphezulu, isistimu yokukhulisa kabusha i-wafer yamandla aphezulu
Isakhiwo se-wafer laser amplifier sikhonjiswe kuMfanekiso 1. Kuhlanganisa umthombo wembewu yefiber, ikhanda le-laser elicezu elincanyana kanye nembobo yokukhulisa umsindo evuselelayo. I-fiber oscillator ye-ytterbium-doped enesilinganiso samandla angu-15 mW, ubude begagasi obumaphakathi obungu-1030 nm, ububanzi beshayela obungu-7.1 ps kanye nezinga lokuphindaphinda elingu-30 MHz lisetshenziswe njengomthombo wembewu. Ikhanda le-laser elicwecwe lisebenzisa i-Yb eyenziwe ekhaya: ikristalu ye-YAG enobubanzi obungu-8.8 mm nogqinsi luka-150 µm kanye nesistimu yokumpompa ye-stroke engu-48. Umthombo wephampu usebenzisa ulayini oyiziro-phonon LD onobude obungamaza okhiye bokukhiya obungu-969 nm, okwehlisa isici se-quantum sibe ngu-5.8%. Isakhiwo sokupholisa esiyingqayizivele singapholisa ngempumelelo ikristalu ye-wafer futhi siqinisekise ukuzinza kwe-cavity yokuvuselela. Imbobo yokukhulisa evuselelayo iqukethe amaseli e-Pockels (PC), ama-Thin Film Polarizers (TFP), ama-Quarter-Wave Plates (QWP) kanye ne-resonator ezinza kakhulu. Ama-Isolators asetshenziselwa ukuvimbela ukukhanya okukhulisiwe ukuthi kungalimaza umthombo wembewu. Isakhiwo se-isolator esihlanganisa i-TFP1, i-Rotator ne-Half-Wave Plates (HWP) isetshenziselwa ukuhlukanisa imbewu yokufaka kanye nama-pulses akhulisiwe. I-pulse yembewu ingena ekamelweni lokukhulisa kabusha nge-TFP2. Amakristalu e-Barium metaborate (BBO), i-PC, ne-QWP kuhlangana ukwenza inkinobho yokubona esebenzisa amandla kagesi aphezulu ngezikhathi ezithile ku-PC ukuze ithwebule ukushaya kwembewu bese iyisabalalisa emuva naphambili emgodini. I-pulse efiselekayo i-oscillates emgodini futhi ikhuliswa ngokuphumelelayo ngesikhathi sokusakazwa kohambo lokuya nokubuya ngokulungisa kahle isikhathi sokuminyanisa sebhokisi.
I-wafer regeneration amplifier ibonisa ukusebenza okuhle kokukhiphayo futhi izodlala indima ebalulekile ezinkambini zokukhiqiza ezisezingeni eliphezulu njenge-extensive ultraviolet lithography, umthombo wepompo we-attosecond, izinto zikagesi ze-3C, nezimoto zamandla amasha. Ngasikhathi sinye, ubuchwepheshe be-wafer laser kulindeleke ukuthi busetshenziswe kumandla amakhulu amakhuluamadivaysi laser, ukuhlinzeka ngezindlela ezintsha zokuhlola zokwakheka nokutholwa kahle kwendaba esikalini sesikhala se-nanoscale kanye nesilinganiso sesikhathi se-femtosecond. Ngomgomo wokusiza izidingo ezinkulu zezwe, ithimba lephrojekthi lizoqhubeka nokugxila ekusungulweni kwezobuchwepheshe be-laser, liphinde liphule ekulungiseni amakristalu e-laser anamandla amakhulu, futhi lithuthukise ngempumelelo ucwaningo oluzimele kanye namandla okuthuthukisa amadivaysi e-laser imikhakha yolwazi, amandla, imishini ephezulu nokunye.
Isikhathi sokuthumela: May-28-2024