Koj Puas Paub Txog Mid-infrared Solid-state Lasers?(Part 1)

Nruab nrab-infrared bandhais txog ib qho band nyob rau hauv infrared wavelength ntau yam, vim muaj kev thov sib txawv, qhov sib txawv ntawm nruab nrab-infrared wavelength muaj cov ntsiab lus sib txawv hauv ntau daim ntawv thov. Lub koom haum International Teeb pom kev zoo txhais nruab nrab-infrared li 3-1000μm; Hauv tub rog feem ntau txwv rau 3-5 μm; Nyob rau hauv lub tshav pob ntawm laser technology, qhov nruab nrab-infrared laser wavelength ntau yog hais txog ib tug 2-5 μm band.

(1) Chaw sib txuas lus

Lub mid-infrared band yog nyob rau hauv lub qhov rais nqus tsev ntawm huab cua. Raws li pom tau los ntawm daim duab 1, nyob rau hauv nruab nrab-infrared band, qhov kev xa tawm ntawm feem ntau lub wavelengths siab tshaj 60 feem pua, qee qhov ntawm lawv muaj siab txog li 90 feem pua, thiab cov xov tooj ntawm cov wavelengths tsawg heev vim qhov nqus thiab xa tawm. ntawm CO2, H2O, thiab O3 molecules. Yog li ntawd, mid-infrared laser tuaj yeem paub txog kev sib kis mus ntev hauv cov huab cua thiab muaj ntau yam kev siv hauv cov chaw taws teeb sensing, nrhiav pom, thiab lwm yam.

Lub mid-infrared band ntawm 3-5 μm yog lub qhov rais ntawm qhov poob qis, tsis muaj zog turbulence, thiab tsis muaj zog tom qab lub suab nrov ntawm huab cua, uas muaj peev xwm kov yeej cov kev cuam tshuam ntawm atmospheric channels zoo, thiab yog lub zoo tagnrho band rau ntev-ntev laser kev sib txuas lus hauv qhov chaw.

Cov ntaub ntawv ceev ceev uas yuav tsum tau xa mus yog encoded thiab loaded mus rau lub optical carrier tso zis los ntawm nruab nrab-infrared laser qhov chaw los tsim ib tug nruab nrab-infrared laser teeb liab, thiab ces amplified los ntawm lub optical hwj chim thiab lub transmitting kav hlau txais xov kom nthuav lub beam. Lub hom phiaj ntawm kev nthuav dav ntawm cov nqaj yog txhawm rau txhawm rau qhov sib txawv ntawm lub kaum sab xis ntawm lub nqaj thiab txo qhov sib txawv ntawm cov nqaj laser nyob rau hauv qhov chaw, thiab tom qab ntawd xa mus los ntawm atmospheric channel mus rau qhov kawg tau txais. Nws yog kis tau los ntawm tus kav hlau txais xov txais thiab hloov dua siab tshiab los ntawm nruab nrab infrared photodetector, thiab thaum kawg ua tiav los ntawm cov ntaub ntawv ua haujlwm xws li cov kab decoder, cov ntaub ntawv tseem ceeb tau txais.

(2) Cov ntawv thov kho mob

Cov dej molecules yog ib feem tseem ceeb ntawm cov ntaub so ntswg lom (dej nqus spectrum yog qhia hauv daim duab 3). Cov nyhuv thermal ntawm cov dej molecules ntawm kev nqus ntawm 1.9-2μm laser tuaj yeem ua tiav hemostasis sai thiab txo qhov kev puas tsuaj rau tib neeg cov ntaub so ntswg thaum phais. Yog li ntawd, lasers nyob rau hauv no band yog dav siv nyob rau hauv kev kho mob phais.

Cov mob uas tau siv rau hauv kev kho mob phais muaj xws li resection ntawm benign thiab malignant qog xws li angioceratoma thiab hlwb hlav, qhov ntswg phais xws li qhov ntswg polyps, follicular hyperplasia ntawm lub posterior pharyngeal phab ntsa, hypertrophy ntawm inferior turbinate, endometrial transposition, glandular cystitis. , prostatic hypertrophy, lithotripsy, laser myocardial perforation, sib koom synoviectomy, sib koom cyst thiab lwm yam mos mos resection thiab kev kho mob ntawm osteoarthritis, thiab lwm yam.

Txoj kev kho mob no muaj qhov zoo dua los yog tsis muaj los ntshav, tsis tas yuav tsum tau tamponade, kev raug mob me me, kho tau sai ntawm qhov raug mob, thiab txoj kev phais yooj yim.

(3) Kev siv tub rog

Directional infrared jamming technology yog ib hom ntawm infrared active jamming technology, tom qab lub laser beam mus txog ib tug tej yam beam expansion piv, thaum muaj ib tug missile mus txog, cov nrhiav tau siv los coj lub jamming zog rau cov kev taw qhia ntawm cov tuaj missile, ua rau. tus missile nrhiav tsis tau thiab deviate los ntawm lub hom phiaj.

Lub Tebchaws Asmeskas Naval Laboratory tau ua tiav kev tsim ntau pawg Anti-ship Tactical Electronic Warfare System (MATES) rau Kev Ua Haujlwm Hluav Taws Xob Hluav Taws Xob (AIEWS), uas siv lub teeb ci feem ntau nyob rau hauv qhov ntau ntawm mid-wave infrared thiab far- infrared laser li.

(4) Muaj kev ua haujlwm

Cov yas pob tshab muaj qhov nqus me me ntawm 1μm band, thaum cov khoom siv organic feem ntau muaj qhov nqus txaus ntawm 2μm, yog li lawv tuaj yeem siv ncaj qha rau hauv kev txiav, vuam, kos duab, thiab lwm yam kev ua haujlwm ntawm cov ntaub ntawv pob tshab. Nrog rau qhov muaj koob meej ntawm laser 3D luam ntawv thev naus laus zis, 3D luam ntawv kev lag luam ntawm cov ntaub ntawv organic pob tshab yuav txhim kho sai dua.

(5) Kev saib xyuas roj

Lub mid-infrared band tsom rau cov kab nqus ntawm cov pa roj molecules ntau, thiab nws qhov nqus tau yog 2-3 npaug zog dua li ntawm qhov ze-infrared band. Yog li ntawd, mid-infrared laser muaj ntau yam ntawm pej xeem tus nqi nyob rau hauv lub tshav pob ntawm cov pa roj nrhiav kom tau. Txij li thaum lub siab nqus ntawm CO2, CH4, thiab C2H6 yog nyob rau hauv bands ntawm 2.8 μm, 3.2 μm, thiab 3.3 μm feem, lub nruam nruab nrab-infrared laser yuav siv tau rau molecular spectroscopy los txhim kho qhov rhiab heev ntawm cov pa roj saib xyuas.

Mid-infrared solid-state laser tiam technology

Rau cov khoom siv hluav taws xob hauv lub xeev laser, cov txheej txheem tiam ntawm nruab nrab-infrared band tuaj yeem muab faib ua doped ion ncaj qha emission thiab nonlinear conversion technology.

Qhov ncaj qha emission ntawm doped ions yog emission ntawm nruab nrab-infrared photons los ntawm lub zog theem hloov ntawm ions. Cov khoom siv hauv lub xeev muaj xws li cov ions tsis tshua muaj hauv ntiaj teb (Tm3 ntxiv, Ho3 ntxiv, Er3 ntxiv, thiab lwm yam) thiab kev hloov pauv hlau ions (Fe2 ntxiv, Cr2 ntxiv, thiab lwm yam).

Nonlinear zaus hloov cov tswv yim muaj xws li qhov sib txawv zaus, kho qhov muag parametric oscillation, thiab txhawb Raman tawg, uas yog txiav txim siab los ntawm cov khoom ntawm nonlinear crystals.

(1) Thulium-doped solid-state laser

Lub emission band ntawm thulium laser yog nyob rau ntawm lub ncov nqus dej molecules (1.92-1.94μm), yog li thulium laser yog ib qho kev cog lus kho mob laser nrog high efficiency thiab thermal puas thaum siv hauv kev phais. Tsis tas li ntawd, thulium-doped lasers tuaj yeem siv los ua qhov chaw siv rau holmium-doped laser systems thiab mid-infrared parametric lasers.

Lub ncov nqus ntawm cov ntaub ntawv thulium-doped yog nyob ib ncig ntawm 790 nm, uas yog tsim rau semiconductor siv. Cov ntaub ntawv thulium-doped matrix muaj xws li YAG, YLF, LuAG, YAP, thiab lwm yam. Nyob rau hauv xyoo tas los no, tshiab nce xov xwm raws li sesquioxide ceramics, xws li Tm: Lu2O3, thiab Tm: (Lu, Sc) 2O3, kuj tau kawm dav dav. .

Lub zog theem ntawm thulium ion yog dav nyob rau hauv qhov kev txiav txim ntawm cov siv lead ua teb ntawm cov khoom siv matrix, thiab lub zog theem dav thiab band interval sib txawv, tab sis cov yam ntxwv tseem ceeb yog qhov zoo sib xws, thiab cov emission spectrum kab feem ntau yog concentrated nyob rau hauv ntau yam. 1 9-2.1 μm. Tunable tso zis nrog nqaim linewidth tuaj yeem ua tiav los ntawm kev kho cov ntsiab lus xws li ntim Bragg grating nrog nws qhov dav fluorescence spectrum.

Cov ntaub ntawv tiv tauj:

Yog tias koj muaj lus nug, thov hu rau peb. Txawm peb cov neeg muas zaub nyob qhov twg thiab peb cov kev xav tau yog dab tsi, peb yuav ua raws li peb lub hom phiaj los muab peb cov neeg siv khoom zoo, tus nqi qis, thiab kev pabcuam zoo tshaj plaws.