Fais fab v. Mem tes dav Dim Txaj? Tswj cov Wireform ntawm 100 Tw ncov Fais Fab 4.3 FS Sub- bipolar laser pulses los ntawm teb hluavtaws
Raws li cov cuab yeej tseem ceeb rau kev tshawb nrhiav lub xeev ntawm cov teeb meem ntawm cov teeb meem thiab cov txheej txheem ultras Tsis ntev los no, ib pab neeg thoob ntiaj teb los ntawm Ume {}} pulse} Nem}) thev naus laus zis thev naus laus zis ua lag luam Lawv ua tiav sub - ob - Kev tso tawm lub zog laser laser ntawm 100 tw thiab ib tug mem tes ntev ntawm tsuas yog 4.3 fs. Txoj haujlwm no muab cov kev txhawb nqa thev naus laus zis ntxiv rau tom ntej no {}} tiam attosecond science, relativistic laser ntshav physics, thiab optics heev. Txoj kev tshawb no hu ua "WaveForm- tswj cov cheeb tsam synthes ntawm 100} ob lub zog pultes ntawm qhov teeb meem kawg ntawm xwm.
Thaum "luv tshaj" ua tau raws "muaj zog tshaj": daws lub zog "{}} pulse {1} 1 1}
Ultrafast laser thev naus laus zis tau ua rau muaj kev nce qib ntau dhau los, hloov kho ob txhais tes, ua raws li lub zog siab dua; Ntawm qhov tod tes, ua raws cov mem tes kom ntev kom ua tiav cov kev daws teeb meem siab dua. Cov kev txwv ntawm cov tsoos lasas ua zoo li "Txoj Cai Kev Nyab Xeeb Kev Nyab Xeeb": Ua kom tiav cov kev ntsuas hluav taws xob luv luv, tab sis feem ntau laser tau txais bandwidth; Yuav kom ua kom tiav lub zog siab dua, qhov ntev ntev kev sib tw thiab kev tsim hluav taws xob ntau dua yog xav tau, uas nyob rau hauv lem txwv txoj cai ntawm mem tes compression.
Piv rau cov tsoos sidanium sapphire laser tshuab, kho qhov muag ua kom zoo nkauj, ua kom tiav sub bandwidth, ua kom tiav sub - lub voj voog pulses. Txawm li cas los xij, kom tau txais kev ua tiav 100 ntxaij - Lub zog thev naus laus zis ntau npaum li cas: ua li cas kom ua tiav ultra {4} dav bandwidth? Yuav ua li cas kom ntseeg tau ntev - lub sij hawm ruaj khov ntawm cov cab kuj lub hnab ntawv (cep)? Yuav ua li cas thiaj ua tiav kev sib piv siab dua kom tsis txhob ua ntej -} pulse cuam tshuam?
Hauv kev tshawb fawb no, tus kws sau pab pawg: Coherent Teb Synthesis thiab ua kom haum rau cov khoom lag luam tawm los ntawm cov khoom siv hluav taws xob tsis sib xws
Coherent teb synthesis thiab ua kom zoo OPCPA tsim
Txhawm rau kom tsim sub - bipolol ultra - pulses luv, nws yog thawj zaug tsim nyog los tsim kom muaj kev sib txawv txaus. Pab pawg neeg ua haujlwm rau cov kab ke serial synthesis, faib cov chaw sib txawv (580-1020 nm) ua ob qho kev sib cais, ua raws li los ntawm kev sib koom tes synthesis. Raws li muaj nyob hauv daim duab 1, pab pawg lub teeb kaus nthwv dej yauv synthesizer 100 (LWS100) system ua hauj lwm pab peb {{9} theem txhim kho OPCPA qauv. Txhua theem nyob nrog ob qho kev tawm tsam kho qhov muag ua piv txwv: ib qho los ntawm 532 NM thib ob cov kev sib ntaus sib tua, lub luag haujlwm rau thaj av liab (700-1020 nm); Thiab lwm qhov tso tawm los ntawm qhov thib peb harmonic ntawm 355 nm, lub luag haujlwm rau Amplifying Blue Lub Teeb Pom Kev (580-700 nm). Cov qauv tsim no ua tiav cov ntu sib txawv, chin los qhia sib txawv ntawm txhua qhov kev sib cais ntawm txhua qhov kev sib cais thaum tswj cov theem sib txawv ntawm cov zaus sib txawv.
Daim duab 1 Teeb ntawm LWS100 Txhim Kho OPCPA
Lub kaw lus ua haujlwm -} theem-}}}}}}) muaju nruab nrab. Cov pab pawg tshawb fawb prefolled lub theem {}}}}}}}}}} Cov dog ntawm lub teeb ntawm kev sib txawv ntawm wavelengths.
Daim duab 2 lub ntsuas ntsuas ntsuas (a) thiab simulation (b) evolution hauv LWS100
Ntau cov ntaub ntawv metric Qhia Tshwj Xeeb Kev Ua Haujlwm
Huab kev tsom iav thiab kev siv nrawm
The typical spectrum of the LWS100 on a linear scale is shown in Figure 3, with a central wavelength of 780 nm. The corresponding time intensity shown in Figure 3(b) has a full width at half maximum (FWHM) duration of 4.3 fs, equivalent to 1.67 optical cycles, thus approaching the Fourier limit within a 2–3% range. This short duration confirms coherent field synthesis from two spectral ranges at the 100 TW power level, where each range alone could only support longer pulses (>7 fs).
Daim duab 3 Spectral, thiab cov yam ntxwv ntawm lub cev ntawm LWS100
WaveFic Kev Ruaj Ntseg thiab Tshaj Tawm
Rau sub -} ob npaug {{1} {1}- CP piav qhia txog kev sib txheeb theem sib txheeb ntawm cov cab kuj thiab hnab ntawv, thiab txawm tias qhov kev hloov me me tuaj yeem cuam tshuam ntau dua rau cov txheej txheem laser- teeb meem cuam tshuam. Pab pawg tau txais lub cep pass - ruaj khov pem hauv ntej-} Tegouping los ntawm qhov sib txawv zaus (DFG). Raws li muaj nyob hauv Daim Duab 4, cov txheej txheem ua tiav CEP stability ntawm<100 mrad at the front end, and through feedback control, the overall system CEP stability reaches an excellent level of <300 mrad. During a continuous one-hour test, the system demonstrated outstanding long-term stability, with CEP drift consistently maintained within the 2π range, providing reliable assurance for attosecond science experiments requiring extremely high phase precision.
Daim duab 4 WaveForm ruaj khov thiab sib piv ntawm LWS100
Lwm qhov tseem ceeb metric rau high- fais fab system yog kev sib piv ntawm sab cev nruab nrab ntawm lub ntsiab mem tes thiab ua ntej- pulte. Los ntawm kev tsim kho kom tiav OPCPA thiab cov txheej txheem tiv thaiv txhim kho, lub kaw lus ua tiav qhov sib txawv ntawm kev sib piv ntawm 11 xaj ntawm qhov ntau. Tshwj xeeb, los ntawm kev tso ib qho acousto -}}}}}} roj fluorects lub zog zoo, ua rau lub kaw lus zoo sib xws.
Lub cev nqaij daim tawv sab hauv - daws
Txawm hais tias ib tug mem tes ntev ntawm 4.3 FS twb nyob ze rau ntawm lub cev txwv, pab neeg kuj tau pom cov ntawv thov ntawm sab hauv {{1} thev naus laus zis thev naus laus zis. Los ntawm kev sib txawv ntawm cov amplitude thiab xaiv hle spectral Cheebtsam hauv 745-825 NM 20,7 FS, ua tiav cov kev tawm tsam sub-4 FS Mem tes. Raws li qhov tshwm sim, kev siv lub zog siab thiab lub ncov siab tshaj plaws tau txo qis rau 40% ntawm cov pults thawj zaug los txhawb nqa ntau yam ultroscopy thiab attosecond kev sim.
Daim duab 5: Lub sijhawm Super - daws tau siv LWS100 txhawm rau tsim cov sub-4 FS pulses
Txoj kev tshawb fawb pom tau ib qho kho qhov muag ua rau cov tshuaj lom neeg uas tau muab cov roj tseb thiab cov pa roj hmab kom sov. Serial teb synthesis ua rau muaj cov spectrum thoob plaws ze li ib lub octave rau joule {{}} muaj qib zog. Nyob rau hauv txoj kev no, ib tug 100 tw - txoj kev qib mem tes nrog lub sijhawm ntawm 4.3 fs, catch ruaj khov, thiab rms ruaj khov hauv qab 300 mrad tau tsim. Daim Ntawv Tus Sau, Xib fwb Laszlo Veisz ntawm University of Tromsø ({}}} Teb xws li aphosecond physics, heev nolinear optics, thiab kev tso siab ntshav ntshav, thiab cov ntshav ntshav tsis zoo. "
Cov pab pawg tshawb fawb tau sau tseg tias cov thev naus laus zis muaj peev xwm ua kom lub ntsej muag, thiab siv lub zog tsis sib xws Nyob rau hauv lub neej yav tom ntej, los ntawm txhim kho cov synthesis thiab dispersion tswj kev tswj hwm, nws yuav ua tau los tsim sub- pa pulses nrog petawatt ncov siv zog.
