Nyob rau hauv lub xyoo caum dhau los, nrog kev txhim kho txuas ntxiv ntawm cov twj tso kua mis thiab cov qauv laser, fiber ntau laser tshuab tau zoo heev. Raws li doped optical fiber ntau (YDF-Laser) yog dav siv hauv kev lag luam, kev tshawb fawb tshawb fawb, thiab lwm yam vim muaj hluav taws xob-kho qhov muag hloov pauv kev ua tau zoo, cov nqaj zoo dua thiab ruaj khov.
Fig1. Spectral absorption tus nqi ntawm cov khoom hlau sib txawv
Niaj hnub no lub high-power ib hom fiber ntau lasers tau ntev tau yooj yim siv cov KW-theem kho qhov muag fais fab tso zis, uas ua rau xws li lasers nyob rau hauv lub tshav pob ntawm hlau ua. Nyob rau hauv tib lub teeb pom kev zoo lub zog, vim qhov sib txawv ntawm qhov nqus, 1 micron fiber ntau laser raws li cov neeg laus fiber ntau yog qhov zoo dua qub thaum CO2 laser ntawm 10 microns ua haujlwm zoo dua li cov khoom siv hlau. Fig 1 muab cov spectral absorption tus nqi ntawm cov ntaub ntawv hlau sib txawv, uas tuaj yeem pom los ntawm daim duab uas feem ntau ntawm cov khoom siv hlau ntawm cov yam ntxwv ntawm cov spectrum nthuav tawm qhov kev xav kom txo qis thaum lub teeb pom kev zoo nce. Cov khoom siv hlau yog pom tseeb muaj zog tshaj qhov tso zis wavelength ntawm 1070 nm piv rau cov zis wavelength ntawm CO2 laser ntawm CO2 laser ntawm 10.6um. Tshwj xeeb, qhov nqus ntawm cov hlau hlau nyob rau hauv 1070 nm wavelength yog ze li ntawm 6 npaug qis dua 10.6um wavelength tej yam kev mob.
Fig 2. txheeb ze nqus ntawm aluminosilicate thiab phosphosilicate (YB) fiber ntau ntawm 800-1100 nm spectrum
Vim hais tias cov khoom siv kho qhov muag fiber ntau muaj qhov nqus tau zoo heev ntawm 976 nm thiab 915 nm wavelength, cov lasers no feem ntau yog siv los ntawm ib qho semiconductor laser (LD) uas emits saum toj no wavelength. Fig 2 yog ob qho tib si doped optical fibers rau cov txheeb ze nqus tus nqi ntawm 800 txog 1100 nm spectroscopy, thiab muaj qhov tseem ceeb ntawm qhov nqus dej ncov ze 915 nm thiab 976 nm. Qhov nqus ntawm 976nm lub teeb tsis nyob rau hauv aluminosilicate dumping fiber ntau yog ze li peb zaug ntawm lub teeb nthwv dej ntawm 915 nm, thiab qhov nqus ntawm qhov qub hauv phosphosilicate yog ze li 5 npaug tom kawg. Xws li qhov tsis zoo yog qhov sib txawv, txhais tau hais tias xws li lasers txais 976nm LD twj tso kua mis tshuab kom ua tau zoo dua lub teeb-optical conversion efficiency. Nyob rau tib lub sijhawm, kev nqus siab dua kuj txhais tau tias txo qhov ntev ntawm cov fiber ntau, yog li txo qis cov teebmeem tsis zoo rau qee yam.
Fig.3 Curve of Photon Dinoff (PD) Poob YB Ion Zog Cov kauj ruam sib txawv.
Tam sim no, loj-ua yeeb yam tsis tshua muaj lub ntiaj teb doped fiber ntau lasers yuav tsum tau ntsib teeb meem photodational. Qhov teeb meem no ua rau muaj qhov txo qis hauv cov zis hluav taws xob ntawm lub laser, ruaj khov thiab ua haujlwm lub neej. Photon Darkness Qhov tshwm sim kuj tau tshaj tawm nyob rau hauv ntau ntawm ion-doped fiber ntau lasers. Nws feem ntau suav hais tias qhov tshwm sim no yog tshwm sim los ntawm cov xim-qhov chaw uas ua rau hauv cov iav matrix. Cov kev tshawb fawb yav dhau los tau npaj ntau txoj hauv kev los daws qhov photon dacte, suav nrog co-doped phosphorus hauv fiber ntau, siv 405 nm laser, photobleaching, txawm tias siv qhov kub thiab txias, annealing ntawm photon decimensing ntawm photon tshwm sim. . Ntawm lawv, txawm hais tias phosphorus tuaj yeem tiv thaiv tau zoo, qhov poob ntawm keeb kwm yav dhau thiab cov lej aperture tau nce.
Cov kev tshawb fawb yav dhau los ntawm pab pawg Koponen, ntawm photon darker pom tau tias photon kom tsawg tshaj plaws nyob ntawm qhov ntau ntawm cov mites excitation, uas yog lub zog lub xeev thim rov qab ntawm ion (YB Inversion Rate). Lawv pom tias photon noj cov nqi yog proportional rau 7 lub sij hawm nyob rau hauv lub ionic zog reversal tus nqi. Ib qho nkhaus ntawm photon intiminated poob lub sij hawm nyob rau hauv Fig 3 nyob rau hauv Fig 3 yog muab nyob rau hauv daim duab 3. Cov ntaub ntawv yog intuitive heev uas lub photon darking tus nqi nce sharply nrog lub zog ntawm reversal.
Daim duab 4, YB Ion Energy Reverse Rate Raws li lub twj tso kua mis hloov pauv nkhaus nyob rau hauv 976 Nm thiab 920 NM Pump Condition (Xaiv tias cov ntaub ntawv thim rov qab tau zoo txaus thaum tus qauv sib txawv tsawg dua 1%)
Lub zog lub xeev thim rov qab tus nqi hauv cov doped fiber ntau cuam tshuam los ntawm qhov loj ntawm fiber ntau, lub zog twj tso kua mis, lub teeb tawm tswv yim, thiab lub wavelength ntawm lub twj tso kua mis lub teeb wavelength. Lub twj tso kua mis tsim lub teeb wavelength tuaj yeem ua rau muaj kev cuam tshuam loj heev. Lub zog-lub xeev thim rov qab yog kwv yees li qhov piv ntawm photonic nqus nrog tib lub emission hla ntu ntawm ib lub twj tso kua mis lub teeb wavelength, thiab tom qab ntawd lub zog lub xeev ntawm cov doped fiber ntau tau txais nyob rau hauv ob lub teeb lub teeb ntawm 976 nm thiab 920 nm. Tus nqi thim rov qab sib txawv nrog lub twj tso kua mis hloov pauv (Daim duab 4). Txawm hais tias qhov nqus spectrum hauv FIG 2 hauv thawj FiG 2 qhia tau hais tias cov yam ntxwv nqus ntawm 976nm wavelength lub teeb yog qhov muaj zog dua li lwm cov wavelengths, tab sis vim tias 976 nm wavelength lub teeb yog qhov loj, nws yog thaum kawg tau los ntawm lub teeb pom kev zoo dua li hauv. 920nm ua. Lub zog qis hauv qhov xwm txheej qis dua. Txawm hais tias cov ntaub ntawv tsis ncaj qha muab lub zog lub xeev thim rov qab ntawm 915 nm twj tso kua mis, nws tseem muaj peev xwm xav tias 976nm twj tso kua mis lub teeb muaj qhov muaj zog tiv thaiv kev kho qhov muag sub-profiling muaj peev xwm dua li yav dhau los.
Txawm hais tias txoj kev 976nm twj tso kua mis muaj qhov nqus tau ntau dua thiab lub teeb hloov pauv tau zoo, nws tuaj yeem txo qhov ntev ntawm qhov nce fiber ntau, thiab cov teebmeem photon canache tuaj yeem txo qis, tab sis nws cov txheeb ze rau 915 nm twj tso kua mis hom ntawm kev kho fiber ntau thiab kev sib txuas. . Technical nyuaj dua. Ntxiv mus, qhov nqus spectrum ntawm cov khoom siv fiber ntau hauv 976 nm ntau yog nqaim dhau. Lub wavelength hloov los ntawm qhov kub hloov pauv ntawm lub twj tso kua mis tuaj yeem ua rau lub zog laser tso zis tsis ruaj khov, thiab lub tshuab twj tso kua mis no muaj qhov yuav tsum tau nruj heev ntawm laser lub thermal tswj system. Vim li no, tsuas yog ob peb lub tuam txhab laser zoo li lub teb chaws Yelemees IPG, Tebchaws Asmeskas Coherent-Rofin, thiab US GW thiab lwm cov tuam txhab siv 976 nm twj tso kua mis qhov chaw nyob rau hauv loj-scale industrial lasers.
Post lub sij hawm: Lub Xya hli ntuj-27-2021