Potassium dideuterium phosphate (DKDP) yog ib hom nonlinear optical siv lead ua nrog zoo heev electro-optic zog tsim nyob rau hauv 1940s. Nws yog dav siv nyob rau hauv optical parametric oscillation, electro-optic Q- hloov, electro-optic modulation thiab lwm yam. DKDP Crystal muajob theem: monoclinic theem thiab tetragonal theem. Cov pab tau DKDP siv lead ua yog tetragonal theem uas belongs rau D2d ib-42m point group thiab ID122d ib -42d pawg chaw. DKDP yog ib qho isomorphicqauv potassium dihydrogen phosphate (KDP). Deuterium hloov hydrogen hauv KDP siv lead ua kom tshem tawm qhov cuam tshuam ntawm infrared nqus los ntawm hydrogen vibration.DKDP Crystal nrog siab deuteration nasio muaj zoo dua electro-optical khoom thiab zoo dua nonlinear zog.
Txij li thaum xyoo 1970, txoj kev loj hlob ntawm laser Inertial Ckev ua tsis tiav Fusion (ICF) thev naus laus zis tau txhawb nqa txoj kev loj hlob ntawm cov khoom siv hluav taws xob photoelectric, tshwj xeeb tshaj yog KDP thiab DKDP. Raws li ib electro-optical thiab nonlinear optical khoom siv hauv ICF, siv lead ua yog yuav tsum muaj siab transmittance hauv yoj bands los ntawm nyob ze-ultraviolet rau ze-infrared, loj electro-optical coefficient thiab nonlinear coefficient, siab ua puas tsuaj, thiab ua muaj peev xwm ua npajd hauv loj-aperture thiab nrog high-optical zoo. Txog tam sim no, tsuas yog KDP thiab DKDP crystals ntsib covse kev xav tau.
ICF xav tau qhov loj ntawm DKDP tiv thaiv mus txog 400 ~ 600 mm. Nws feem ntau siv 1 ~ 2 xyoos kom loj hlobDKDP Crystal nrog xws li loj loj los ntawm txoj kev cai ntawm aqueous tov cua txias, yog li ntau txoj haujlwm tshawb fawb tau ua tiav tau Kev loj hlob sai ntawm DKDP crystals. Nyob rau hauv 1982, Bespalov et al. kawm txog kev loj hlob sai ntawm DKDP siv lead ua nrog ib ntu ntawm 40 hli×40 mm, thiab qhov kev loj hlob mus txog 0.5-1.0 mm / h, uas yog ib qho kev txiav txim ntawm magnitude siab tshaj li ib txwm txoj kev. Nyob rau hauv 1987, Bespalov et al. ntse loj hlob zoo DKDP siv lead ua nrog qhov loj ntawm 150 mm×150 hli×80 hli los ntawm siv txoj kev loj hlob sai zoo sib xws. Nyob rau hauv 1990, Chernov et al. tau DKDP crystals nrog loj ntawm 800 g los ntawm kev siv point-noob txoj kev. Kev loj hlob tus nqi ntawm DKDP crystals hauv Z-kev taw qhia mus txogd 40-50 mm / d, thiab cov hauv X- thiab Y-cov lus qhia ncav cuagd 20-25 hli / d. Lawrence Livermore National Laboratory (LLNL) tau ua ntau yam kev tshawb fawb txog kev npaj ntawm loj-loj KDP crystals thiab DKDP crystals rau cov kev xav tau ntawm Nhais lus Ignition Facility (NIF) ntawm teb chaws USA. Hauv xyoo 2012,Cov kws tshawb fawb Suav tau tsim DKDP Crystal nrog qhov loj ntawm 510 hli×3 90mm×520 hli los ntawm uas ib tug raw DKDP feem ntawm hom II zaus ob npaug nrog qhov loj ntawm 430 mm yog ua.
Electro-optical Q-hloov daim ntawv thov xav tau DKDP crystals nrog cov ntsiab lus siab deuterium. Nyob rau hauv 1995, Zaitseva et al. loj hlob DKDP crystals nrog siab deuterium cov ntsiab lus thiab kev loj hlob ntawm 10-40 mm / d. Nyob rau hauv 1998, Zaitseva et al. tau txais DKDP crystals nrog zoo kho qhov muag zoo, tsis tshua muaj dislocation ceev, siab kho qhov muag uniformity thiab siab puas tsuaj pib los ntawm kev siv nruam pom txoj kev. Hauv xyoo 2006, txoj kev photobath rau kev cog qoob loo ntawm siab deuterium DKDP siv lead ua tau patented. Nyob rau hauv 2015, DKDP crystals nrog deuteration nasio ib ntawm 98% thiab qhov loj ntawm 100 mm×105 hli×96 hli tau ntse zus los ntawm taw tes-noob txoj kev hauv Shandong University ntawm Tuam Tshoj. Thyog Crystal tsis muaj qhov pom qhov tsis xws luag, thiab nws refractive index asymmetry tsawg dua 0.441 ppm ua. Nyob rau hauv 2015, kev loj hlob sai technologyntawm DKDP Crystal nrog deuteration nasio ib ntawm 90% tau siv thawj zaug hauv Suav teb los npaj Q-hloovhauv cov ntaub ntawv, ua pov thawj tias lub tshuab loj hlob sai tuaj yeem siv los npaj 430 mm inch DKDP electro-optical Q-hloovhauv tiv thaiv xav tau los ntawm ICF.
DKDP siv lead ua tsim los ntawm WISOPTIC (Deuteration> 99%)
DKDP crystals raug rau huab cua ntev yuav muaj nto delirium thiab nebulization, uas yuav ua rau kom txo tau qhov tseem ceeb ntawm qhov kho qhov muag zoo thiab poob ntawm conversion efficiency. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau kaw cov siv lead ua thaum npaj cov electro-optic Q-hloov. Yuav kom txo tau lub teeb pom kev zoontawm lub qhov rais sealings ntawm Q-hloov thiab ntawm ntau qhov chaw ntawm cov khoom siv lead ua, qhov ntsuas qhov ntsuas qhov sib txuam ua kua yog feem ntau txhaj rau hauv qhov chaw nruab nrab ntawm cov siv lead ua thiab lub qhov raiss. Txawm wtsis muaj tiv thaiv-reflective txheej, tnws transmittance tuaj yeem yog nce ntawm 92% mus rau 96% -97% (wavelength 1064 nm) los ntawm siv refractive index matching tov. Tsis tas li ntawd, cov yeeb yaj kiab tiv thaiv kuj yog siv los ua kev ntsuas dej noo. Xionget al. npaj SiO2 colloidal zaj duab xis nrog ua haujlwm ntawm noo noo-pov thawj thiab anti-reflectintawm. Kev xa tawm mus txog 99.7% (wavelength 794 nm), thiab laser puas pib mus txog 16.9 J / cm2 (wavelength 1053 nm, mem tes dav 1 ns). Wang Xiaodong et al. npaj a tiv thaiv zaj duab xis los ntawm siv polysiloxane iav resin. Lub laser puas pib mus txog 28 J / cm2 (wavelength 1064 nm, mem tes dav 3 ns), thiab cov khoom kho qhov muag tseem nyob ruaj khov nyob rau hauv ib puag ncig nrog cov txheeb ze av noo siab tshaj 90% rau 3 lub hlis.
Sib txawv ntawm LN siv lead ua, txhawm rau kov yeej lub zog ntawm ntuj birefringence, DKDP siv lead ua feem ntau txais kev hloov kho longitudinal. Thaum siv lub nplhaib electrode, qhov ntev ntawm cov siv lead ua hauv lubnqaj kev taw qhia yuav tsum muaj ntau dua li cov siv lead ua’s txoj kab uas hla, thiaj li tau txais cov hluav taws xob sib xws, uas yog li ntawd nce lub lub teeb absorption hauv crystal thiab thermal nyhuv yuav ua rau depolarization at siab nruab nrab hwj chim.
Raws li qhov kev thov ntawm ICF, kev npaj, kev ua haujlwm thiab kev siv thev naus laus zis ntawm DKDP siv lead ua tau tsim sai heev, uas ua rau DKDP electro-optic Q-hloov mus rau hauv kev kho laser, laser aesthetic, laser engraving, laser npav, kev tshawb fawb tshawb fawb. thiab lwm yam kev siv laser. Txawm li cas los xij, deliquescence, siab nkag poob thiab tsis muaj peev xwm ua haujlwm hauv qhov kub thiab txias tseem yog cov fwj uas txwv tsis pub siv dav ntawm DKDP crystals.
DKDP Pockels cell ua los ntawm WISOPTIC
Post lub sij hawm: Oct-03-2021