Tsis ntev los no, xib fwb Chen Jingbiao pab neeg los ntawm Tsev Kawm Ntawv ntawm Electronics, Peking University, tau ua tiav cov kev hloov tshiab tseem ceeb hauv kev tshawb fawb cov tub ntxhais laser qhov chaw thev naus laus zis ntawm Rydberg Atomic Receiver. Cov ntaub ntawv tshawb fawb ntsig txog "External CavityDiode Laser ntawm 509 nm rau Cs RydbergAtoms" tau tshaj tawm hauv Phau Tsom Faj Txog Kev Siv Physics, phau ntawv xov xwm ntawm kev siv physics nyob rau hauv American Institute of Physics (AIP), kos npe tias pab pawg cov kev tshawb fawb tau tshwm sim hauv thaj chaw tshwj xeeb laser lub teeb qhov chaw rau quantum precision ntsuas tau siv thoob ntiaj teb.
Tsis muaj Rydberg atoms yog cov tseem ceeb hauv cov teb xws li quantum precision ntsuas, microwave hluav taws xob teb nrhiav tau, thiab atomic radar. Lub 509nm laser yog lub teeb ci tseem ceeb kom paub txog ob -photon excitation ntawm kiag li Rydberg atoms. Ib txwm zaus- ob npaug ntawm cov kev daws teeb meem laser muaj qhov tsis zoo xws li cov tshuab loj, cov nqi siab, thiab tsis muaj kev ruaj ntseg txaus. Kev lag luam sab nraud kab noj hniav lasers nyob rau hauv tib lub wavelength band yog ib qho nyuaj rau ua tau raws li nruj specifications ntawm nqaim linewidth, dav hom -hop-free tuning, thiab siab stability nyob rau tib lub sij hawm, uas txwv lub miniaturization thiab practicalization ntawm Rydberg atomic radar system. Nyob rau hauv cov lus teb rau saum toj no -hais txog kev lag luam mob cov ntsiab lus, pab neeg no ntse tsim ib tug siab -kev ua tau zoo 509nm grating sab nraud kab noj hniav semiconductor laser raws li lub Littrow configuration.
Cov khoom siv kho qhov muag. Los ntawm customized GaN-raws li laser chips, qis- suab nrov Circuit Court tsim, 2mK-theem siab-precision kub tswj thiab xa tawm tswv yim technology optimization, ntau yam tseem ceeb kev ua tau zoo breakthroughs tau tiav: lub laser linewidth mus txog 30.0±0.4kHz, mus txog lub thoob ntiaj teb qib siab ntawm cov khoom zoo sib xws nrog tib cov qauv. ; Hom- plhaw- qhov hloov pauv pub dawb yog mus txog 152 teev tsaus ntuj (176GHz), thiab zaus cheb tus nqi nce mus txog 57.6GHz / ms, uas tuaj yeem ua tau raws li qhov xav tau ceev nrawm ntawm radar txais; Lub wavelength fluctuation ntawm kev ua haujlwm dawb yog tsawg dua 1 teev tsaus ntuj hauv 2.5 teev, thiab cov zis hluav taws xob yog 5.08mW.
Lub kaw lus muaj qhov zoo tshaj plaws xws li cov qauv compact, zoo mechanical stability, thiab controllable nqi.
Yeej cov ntaub ntawv zaus (dub dots) thiab Lorentz haum nkhaus (liab nkhaus) ntawm ob qhov zoo tib yam 509nm sab nraud kab noj hniav semiconductor lasers. Qhov sib tw zaus linewidth yog 42kHz, thiab linewidth ntawm ib lub laser ib leeg yog 30.0 ± 0.4kHz. Qhov kev ua tiav no tau txais txiaj ntsig zoo rau cov kev xav tau ntawm Rydberg atom receiver indestructible, thiab muab kev ua haujlwm siab -cov ntsiab lus teeb pom kev zoo rau cov ntawv thov xws li quantum precision ntsuas, microwave sensing, thiab kev sib txuas lus nrhiav kev sib koom ua ke raws li Rydberg atoms, thiab txhawb kev hloov pauv ntawm lwm yam kev lag luam los ntawm kev tshawb fawb txog kev lag luam.
Chen Jingbiao pab pawg tau ntev tau koom nrog kev tshawb fawb ntawm quantum electronics, precision ntsuas laser technology thiab quantum sensing core devices. Qhov kev ua tiav no yog lwm qhov kev tsim kho tshiab tseem ceeb rau pab pawg hauv thaj tsam ntawm qhov tseem ceeb quantum precision ntsuas cov cuab yeej. Nyob rau hauv lub neej yav tom ntej, pab neeg no tseem yuav tsom mus rau cov kev xav tau ntawm lub teb chaws, ua kom cov kev tshawb fawb thev naus laus zis thiab kev ua tiav ntawm kev hloov pauv, thiab muab kev txhawb nqa kev txawj ntse rau siab - kev loj hlob zoo ntawm kuv lub teb chaws quantum thev naus laus zis thiab kev ua tiav ntawm siab - qib kev tshawb fawb thiab thev naus laus zis ntawm tus kheej - kev cia siab.
