Sephaephe se phahameng sa ts'ebetso ea ultrafasttheknoloji ea laser
Matla a phahamengli-laser tsa ultrafastli sebelisoa haholo tlhahisong e tsoetseng pele, tlhahisoleseling, microelectronics, biomedicine, ts'ireletso ea naha le masimo a sesole, 'me lipatlisiso tsa mahlale tse amehang li bohlokoa ho khothaletsa boqapi ba naha ba saense le thekenoloji le nts'etsopele ea boleng bo holimo. Sekotoana se tšesaanetsamaiso ea laserka melemo ea eona ea matla a karolelano e phahameng, matla a pulse a maholo le boleng bo botle ba marang-rang bo na le tlhokahalo e kholo ho fisiks ea attosecond, ts'ebetso ea thepa le likarolo tse ling tsa saense le indasteri, 'me e amehile haholo ke linaha lefatšeng ka bophara.
Haufinyane tjena, sehlopha sa lipatlisiso Chaena se sebelisitse mochini o iketselitseng oafer le thekenoloji e nchafatsang ea amplification ho fihlela ts'ebetso e phahameng (botsitso bo phahameng, matla a phahameng, boleng bo phahameng ba mabone, ts'ebetso e phahameng) sephaphatha se potlakileng haholo.lasertlhahiso. Ka moralo oa "regeneration amplifier cavity" le taolo ea mocheso oa holim'a metsi le botsitso ba mochini oa kristale ea disc ka har'a sekoti, tlhahiso ea laser ea matla a le mong a matla> 300 μJ, bophara ba pulse <7 ps, matla a karolelano> 150 W e fihletsoe. , 'me katleho e phahameng ka ho fetisisa ea ho fetola leseli ho ea ho leseli e ka fihla ho 61%, e leng eona e phahameng ka ho fetisisa ea ho fetola optical e tlalehiloeng ho fihlela joale. The beam quality factor M2<1.06@150W, 8h stability RMS<0.33%, phihlello ena e tšoaea tsoelo-pele ea bohlokoa ho ultrafast wafer laser e sebetsang hantle, e tla fana ka menyetla e mengata bakeng sa lisebelisoa tsa laser tse matla haholo.
Maqhubu a ho pheta-pheta a phahameng, sisteme e matlafatsang ea matla a phahameng a ho hlasimolla
Sebopeho sa seamplifier sa wafer laser se bontšoa ho Setšoantšo sa 1. E kenyelletsa mohloli oa peo ea fiber, hlooho e tšesaane ea laser le sekoti se tsosolosang amplifier. Oscillator ea ytterbium-doped fiber e nang le matla a karolelano ea 15 mW, leqhubu le bohareng la 1030 nm, bophara ba pulse ea 7.1 ps le sekhahla sa ho pheta-pheta sa 30 MHz se sebelisitsoe e le mohloli oa peo. Hlooho ea lesela la sekhura e sebelisa Yb e entsoeng hae: kristale ea YAG e bophara ba 8.8 mm le botenya ba 150 µm le sistimi ea ho pompa 48-stroke. Mohloli oa pompo o sebelisa mohala oa zero-phonon LD o nang le 969 nm lock wavelength, o fokotsang bothata ba quantum ho 5.8%. Sebopeho se ikhethileng sa ho pholile se ka pholisa kristale ka katleho le ho netefatsa botsitso ba sekoti sa ho nchafatsa. Sekhahla se matlafatsang se tsosolosang se na le lisele tsa Pockels (PC), Thin Film Polarizers (TFP), Quarter-Wave Plates (QWP) le resonator e phahameng ea botsitso. Li-isolators li sebelisoa ho thibela leseli le holisitsoeng hore le se ke la senya mohloli oa peo. Sebopeho sa ho itšehla thajana se nang le TFP1, Rotator le Half-Wave Plates (HWP) se sebelisetsoa ho arola peō ea ho kenya letsoho le li-pulses tse matlafatsang. Pulse ea peo e kena ka phaposing ea ntlafatso ea ntlafatso ka TFP2. Likristale tsa Barium metaborate (BBO), PC, le QWP li kopanya ho theha switch ea optical e sebelisang motlakase o phahameng nako le nako ho PC ho khetha ka mokhoa o ikhethileng phallo ea peo le ho e phatlalatsa pele le pele ka sekoting. Pulse e lakatsehang e oscillates ka cavity 'me e holisoa ka katleho nakong ea ho hasoa ha leeto le ho khutla ka ho lokisa hantle nako ea khatello ea lebokose.
Amplifier ea wafer regeneration e bonts'a ts'ebetso e ntle ea tlhahiso 'me e tla bapala karolo ea bohlokoa mafapheng a phahameng a holimo a kang ultraviolet lithography e feteletseng, mohloli oa pompo ea attosecond, lisebelisoa tsa elektroniki tsa 3C, le likoloi tse ncha tsa matla. Ka nako e ts'oanang, theknoloji ea laser ea wafer e lebelletsoe ho sebelisoa ho matla a maholo a mahololisebelisoa tsa laser, ho fana ka mekhoa e mecha ea liteko bakeng sa ho theha le ho lemoha hantle taba ka tekanyo ea sebaka sa nanoscale le femtosecond time scale. Ka sepheo sa ho sebeletsa litlhoko tse kholo tsa naha, sehlopha sa morero se tla tsoela pele ho tsepamisa maikutlo ho nchafatso ea theknoloji ea laser, ho tsoela pele ho phunyeletsa ho lokisoa ha leano la likristale tsa laser tse matla a phahameng, le ho ntlafatsa ka katleho boithuto bo ikemetseng le bokhoni ba nts'etsopele ea lisebelisoa tsa laser. masimo a tlhahisoleseding, matla, thepa ea maemo a holimo joalo-joalo.
Nako ea poso: May-28-2024