Cov kws tshawb fawb los ntawm lub koom haum cov ntaub ntawv Innovation ntawm Kev Tshawb Fawb Txog Kev Tshawb Fawb (UCAs) thiab lub tsev kawm qib siab
Tshwj xeeb, cov kws tshawb nrhiav tau tsim nce Cov zaus sib xyaw ntawm cov kab teeb no rau hauv cov Crystal Crystal ua rau muaj 193 nm laser nrog rau lub zog nruab nrab ntawm 70 mw thiab ib kab lus tsawg dua 880 MHz.
Los ntawm kev qhia txog cov phaj helical theem rau hauv 1553 nm nqaj ua ntej kev sib xyaw ua ke, cov kws tshawb nrhiav tau tsim kev sib xyaw ua ke ntawm lub zog sangular.
Rau cov kws tshawb nrhiav cov kev paub, qhov no yog thawj zaug ua qauv qhia txog xyoo 193 nm orbital Angular lub zog ntawm lub zog-xeev laser.
Xws li lub nqaj muaj txiaj ntsig zoo rau kev ua kom zoo siab sib deev Cov tshuaj fluoride
Arf yog ib tug excomper laser nrog nthwv dej ntawm 193 nm, uas yog nyob rau hauv qhov tob ultraviolet band. Nyob rau hauv cov semiconductor chaw tsim khoom, cov lasers ARF yog siv rau cov lithgy.
Nws tseem tau sau tseg tias kev ua haujlwm bandwidth ntawm lub system yog tsawg dua 880 MHz, thiab nws cov kev ua tau zoo nkauj yog sib piv rau cov kev lag luam niaj hnub no. Nyob rau tib lub sijhawm, lub kaw lus ua haujlwm lub tshuab kho qhov muag ntawm 1200mm X 1800mm, thiab nws cov hneev yuav tau txo ntxiv mus ua tau raws li cov cai ntawm kev lag luam.
Cov txheej txheem hloov dua siab tshiab los ntawm 1030 nm laser mus rau xyoo 193 nm tau piav raws li tau zoo heev rau kev ua haujlwm dhau los los ntawm cov kws tshawb fawb.
Tshwj xeeb, ib qho 1030 nm laser amplifier raws li 2 teev tsaus ntuj muaj peev xwm xa ntau tshaj li ntawm 6 xyoos
Nws yog ib qho tseem ceeb kom nco ntsoov tias kev nqus cov twj tso kua mis - yog cov txheej txheem uas siv lub teeb kom nce electrons los ntawm qis dua rau cov atom lossis molecule.
Hauv kev kawm, cov kws tshawb nrhiav tau los tsim 258 nm laser los ntawm 1030 nm laser los ntawm cov txheej txheem thib ob thiab cov kua qaub cesium hexaborate, ntsig txog. 1030 lasers tseem tuaj yeem siv los ua cov khoom siv tso tawm rau ob-theem kho qhov muag amplifric amplifric amplifated, pulsed 1553 nm laser.
Tsis zoo li lub fiber ntau amplifier, cov kws tshawb fawb tau siv laser peev txheej los ntawm kev kho qhov muag ua piv txwv ua kom tsim kho qhov tseeb los tsim cov enswatt pulsed laser.
Raws li qhov kev hloov kho no, lub kaw lus tau dhau los ua kev sib txuas ntxiv, thiab 258 nm thiab 258 neeb tiam, uas tuaj yeem ua tiav siv txoj kab kev kho tshiab. (Ceeb Toom: Harmonic tiam yog ib qho tsis yog kho qhov muag txheej txheem.)
Qhov txheej txheem ob-theem sib npaug, pumped ntawm 1553 nm lasers, tuaj yeem tsim 221 nm lasers, tuaj yeem tsim cov lihers, los ntawm kev siv lub cev nqaij npuas, tuaj yeem tsim muaj lihscaded lithium tribor Crystal.
Rau 1553 nm pulsed laser peev txheej, nws muaj ob ntu: ib ntu-nthwv dej ua yeeb yam raws li lub zog kho qhov muag ua haujlwm raws li lub sijhawm ua haujlwm polarized niobate crystal.
Lub sijhawm-zaus faib cov lus qhia laser diode ua haujlwm ntawm 1553 nm thiab emits qhov nruab nrab lub zog ntawm 12 mW. Hauv kev tshawb nrhiav, ib qho 1030 NM TSO CAI LASER rau 1MMX1mmXX40MM ib nrab polarized lither los ua thawj theem ntawm cov kho qhov muag ua piv txwv.
Nyob rau lub sijhawm no, lub teeb liab teeb ua kom nrov dua tshiab ntawm thawj theem ntawm cov khoom siv kho qhov muag thiab cov khoom siv kho tshiab laser thiab} μm idler laser.
Tom qab, cov kws tshawb nrhiav tau siv cov kev sojntsuam laser fais fab kev sojntsuam kom paub qhov txawv ntawm lub teeb liab lub teeb liab sib xyaw los ntawm kev txuas ntxiv-nthwv dej laser.
Vim tias lub cev tsis muaj zog ntawm lub twj tso kua mis thiab lub zog muaj zog ntawm lub noob Optical ingametric amplifier tau ze rau 600 mW. (Ceeb Toom: Lub voj voog lub voj voog yog qhov piv tau ntawm lub teeb liab ntawm lub sijhawm ib qho siab, thiab feem ntau yog qhov feem pua.)
Nrog lub twj tso kua mis ntawm ib qho nruab nrab lub zog ntawm txog 700 mw, cov kws tshawb nrhiav tau ntau dua li cov mem tes ntawm Optical Parametric amplifi, coj mus rau ib qho nruab nrab lub zog ntawm 48 mw.
Lub teeb taws xob mem tes ua kom nrov dua hauv theem thib ob ntawm kev siv kho qhov muag tau zoo, qhov twg ntau tshaj plaws hluav taws xob amplittric ampliC3mm monarized lithium niobate crystal.
Nyob rau tib lub sijhawm, cov kws tshawb nrhiav khaws cov twj tso kua mis nter hauv qib thib ob ntawm Optical Parametric AmpliTractment (Ceeb Toom: Photorefractive kev puas tsuaj yog qhov tsis txaus ntseeg kho qhov muag uas tshwm sim thaum cov ntaub ntawv photorefative tau tshwm sim thaum lub teeb ci ntsa iab.)
Duab|Lub zog nruab nrab ntawm lub teeb liab laser hauv theem ob ntawm tus kho qhov muag ua kua roj hluav taws xob (source: siab heev Photonics Nexus)
Nrog rau qhov no, cov kws tshawb nrhiav tau txais 700 MW teeb liab laser ntawm 1553 nm, coj mus rau kev ua tau zoo ntawm 23.3%.
Qhov kev nce hauv kev nce qib no uas tso zis lub zog tuaj yeem txhim kho ntxiv raws li lub zog tso hluav taws xob nce.
Duab|Spectra ntawm cov noob tau siv cov noob thiab teeb liab ntawm thawj theem ntawm cov kho qhov muag ua piv txwv thiab qib thib ob: Paub meej cov photonics nexus)
Cov kws tshawb nrhiav pom tias qhov chaw nruab nrab ntawm lub teeb liab lub laser yog tib yam li cov noob lid, tab sis cov spectrum txo me ntsis.
Txawm hais tias lub suab tsis muaj suab ua kom muaj zog yuav nce ntxiv, muaj hluav taws xob hluav taws xob nce ntxiv, cov teeb liab-rau-suab nrov sib npaug tau ze rau 50 dB.
Txhawm rau ntsuas cov kab kev hloov pauv ntawm 1553 nm laser thaum lub sij hawm kho qhov muag tsis cuam tshuam nrog kev daws teeb meem ntawm 1 MHz thiab ib qho chaw dawb ntawm 1.5 GHz.
Thawj kab ntawm kev nruam-wave laser nthuav dav los ntawm 1870 MHz thiab 580 MHz thaum thawj theem ntawm Optical Parametric amplifier AmpliCetric amplifiter amplifiter amplifier amplifiter amplififier Amametrical AmpliCent, feem.
Duab|Cov kws tshawb nrhiav tshawb xyuas cov mem tes ntev ntawm cov mem tes thiab cov teeb liab lasers nrog ingaas photodetector (credit: advanced photonics nexus).
Vim tias cov txheej txheem hloov pauv ntawm qhov kho qhov muag ua piv txwv, thiab lub sijhawm txo qis dua los ntawm 13.1 ns rau 9 NS.
Raws li qhov no, cov kws tshawb fawb tau txais kev kho qhov muag ua piv txwv-raws li xyoo 700 mw thiab ib lub cev siv sijhawm ntev ntawm 9 NS, uas tuaj yeem siv ua lub twj tso kua mis rau ntau xyoo 193 nm lasers.
Txhawm rau txuas ntxiv daim ntawv thov ntawm 193 nm laser, cov kws tshawb fawb tau ua kom pom tseeb rau thawj lub zog ntawm 1553 nm) hom hom.
Nyob rau lub sijhawm no, ib 25 hli inch kauv phase phase phaj tau mounted nyob rau hauv ib 25.4 hli inch inch lub lens adapter.
Txawm hais tias qhov kawg ntawm cov kauv theem kauv phaj tsis tau coated nrog anti-reating txheej, nws kis tau ntau dua li 90%.
Tus ntoo theried wbital agular lub zog yog hloov mus rau 221 nm laser thiab 193 nm laser thiab cov txheej txheem ntau tshaj plaws.
Txhawm rau txheeb xyuas lub cim ntawm Vortex Beams, cov kws tshawb fawb tau siv cov duab nqaj hluav taws xob los sau lub nqaj profiles ntawm 1553 nm laser thiab lub laser nyob hauv ntau hom.
Ua ntej ntxig ntawm cov theem theem siab, 1553 nm laser, 221 nm laser, thiab 193 nm laser tag nrho cov kev nthuav qhia Gaussian hom profiles. (Gaussian hom profile hais txog ib qho qauv nqaj hlau yuav siv rau cov duab ntawm Gaussian muaj nuj nqi nrog cov yam ntxwv tshwj xeeb.)
Thaum ntxig ntawm cov theem helical theem, 1553 nM laser hom hloov dua siab tshiab thiab ua kom muaj kev cuam tshuam kev faib tawm cov khoom lag luam lag luam ntawm lub Laguerre-Gaussian hom. (Ceeb Toom: Hom kev lag luam-Gaussian yog hom tseem ceeb rau Laser Beams.)
Hauv kev txiav txim siab nws tus nqi topological, cov kws tshawb nrhiav pom tias hom hermite-Gaussian (HG, hu ua Hermite-Gauss) hom, tuaj yeem tau qhia los ntawm cov lens cylindrical. (Nco tseg: hauv optics, lub hermite-gauss hom yog ib qho tseem ceeb nqaj qauv.)
Txhawm rau txo cov nyhuv ntawm cov theem goy ua haujlwm ntawm lub nqaj hermite-gauss yog pib los ntawm cov duab roj calcium fluoride ntawm 200 hli. (Nco tseg: Chaw ua haujlwm Gouy yog ib theem kev ua haujlwm tshwj xeeb ua haujlwm cuam tshuam nrog Gaussian Raj tshaj tawm hauv Optics.)
Vim tias cov lens cylindrical muaj lub luv luv focal ntev, nws muab tso rau ze rau lub focal point ntawm cov lens hauv calcium fluoride lens.
Cov pob cylindricrical converver txoj kev sib tw sib dhos rau hauv ob qho kev sib txawv ntawm lub chaw Vortex nrog rau 2π theem ua haujlwm ntawm lub helical theem phaj. (Nco tseg: Lub Yim Txhuam Txhuam Tawm Khoom Siv Tau uas ib nthwv dej ua tiav kev ua tiav tag nrho nrog kev hwm rau lwm tus.)
Vim tias qhov sib txawv tseem ceeb hauv kev faib tawm ntawm Vortex nqaj thiab cov nqaj ntawm 258 nm laser, kom tau txais kev hloov pauv zoo dua li 2583 NM ntawm lub zog hluav taws xob hauv 2583
Txawm li cas los xij, lub zog hluav taws xob tsis muaj zog ntawm 258 NM laser piv rau qhov kev hloov pauv ntawm Gaussian uas tau txiav txim siab tsuas yog tau txo qis 303 NM Laser thiab 3 MW ntawm 193 NM Laser.
Raws li txoj cai ntawm kev txuag ntawm orbular angular Momentum hauv cov txheej txheem Laser, tiam dhau los ntawm cov nqi sib npaug ntawm cov tais diav.
Yog li ntawd, tus nqi topological ntawm 1553 nm laser yog 1, txoj kev them nyiaj rau hauv 258 n}}
Nyob rau lub sijhawm no, cov kab vortex differraction ntawm 193 NM Vortex nqaj sib faib ua peb qhov ci ci nrog ob qho tsaus ntuj nti nyob rau hauv nruab nrab, thaum kev siv hluav taws xob tsis yog ncig.
Piv nrog rau theem pib vortex nqaj ntawm 1553 nm, lub vortex nqaj profiles ntawm lub sij hawm ntawm cov txheej txheem sib xyaw ua ke vim yog theem tsis sib xws thiab taug kev ntawm cov nonlinear crystal.
Nyob rau tib lub sijhawm, tus qauv cascade nce qhov nyuaj ntawm orbulity of orbulity angular momtum kev hloov dua siab tshiab thiab tej zaum kuj yuav ua rau cov kev tsis txheeb. (Hom kev tshwm sim yog qhov tshwm sim uas cov khoom ntawm cov qauv tshwj xeeb los ntawm cov chaw kho qhov muag tsis txaus ntseeg lossis hloov pauv ntawm lub xeev zoo tagnrho.)
Cov kws tshawb nrhiav ntseeg tias nws yuav ua tau txhawm rau txhim kho cov qauv nqa los ntawm kev siv cov muaju luv luv, lossis los ntawm kev siv tus txheej txheem sib txawv.
Xav tias xyoo 1553 nm laser tau nqus thiab ua kom nrov dua los ntawm 1 {}} 30 nm laser rau xyoo 193 NM laser yog li 0.55%. Yog li ntawd, txawm tias qhov hloov tau tam sim no muaj zog tam sim no, los ntawm kev nce lub zog hluav taws xob ntawm 1030 nm, lub zog ntawm lub xyoo 193 NM, lub zog ntawm milliwatts thiab tejzaum nws txawm nyob ntawm qhov kev txiav txim ntawm watts.
Tsis tas li ntawd, kev siv cov muaju tsis muaj nuj nqis nrog cov coeffinear siab dua yuav txhim kho qhov ua tiav ntawm lub hom phiaj no.
Nyob rau tib lub sijhawm, los ntawm kev tso cov theem helical phaj, Gaussian hom tuaj yeem hloov mus rau ib tiam ntawm 1553 NM Vortex Beam nqa Orbital Momentum.
Los ntawm kev hloov cov theem hloov ntawm cov theem helical phaj, qhov kev txiav txim ntawm kev them nyiaj ntawm kev nkag tau yooj yim. Cov kev tshawb fawb yav dhau los tau tshaj tawm tias kev coj los ua lub zog ua ke, hais tias xyoo 193 NM Vortex Beam kuj tseem tuaj yeem ua kom nrov dua nyob rau hauv cov lasers qub.
Raws li qhov no, cov neeg tshawb nrhiav tau npaj cia tias xyoo 193 NM yuav siv tau rau ntau yam kev siv tshiab, siv nws lub zog loj thiab cov cim vortex nqaj.
