Cov hom laser tunable

Cov hom ntawmlaser kho tau

Daim ntawv thov ntawm cov lasers tunable feem ntau tuaj yeem muab faib ua ob pawg loj: ib qho yog thaum ib kab lossis ntau kab ruaj khov-wavelength lasers tsis tuaj yeem muab qhov xav tau ib lossis ntau qhov wavelengths sib cais; Lwm pawg cuam tshuam nrog cov xwm txheej uaslaserqhov ntev ntawm lub teeb yuav tsum tau hloov kho tas li thaum lub sijhawm sim lossis kev xeem, xws li spectroscopy thiab kev sim nrhiav twj tso kua mis.

Ntau hom lasers tunable tuaj yeem tsim cov nthwv dej txuas ntxiv (CW), nanosecond, picosecond lossis femtosecond pulse outputs. Nws cov yam ntxwv tso zis yog txiav txim siab los ntawm laser gain medium siv. Ib qho yuav tsum tau ua rau cov lasers tunable yog tias lawv tuaj yeem tso tawm lasers hla ntau qhov wavelengths. Cov khoom siv kho qhov muag tshwj xeeb tuaj yeem siv los xaiv cov wavelengths tshwj xeeb lossis cov wavelength bands los ntawm cov emission bands ntawmcov lasers uas hloov tauNtawm no peb yuav qhia txog ntau lub lasers uas tuaj yeem hloov kho tau rau koj

Tunable CW sawv ntsug laser

Hauv kev xav, qhovCW laser uas hloov tauyog lub qauv laser yooj yim tshaj plaws. Lub laser no suav nrog daim iav uas muaj kev cuam tshuam siab, qhov nruab nrab nce thiab daim iav txuas tso zis (saib Daim Duab 1), thiab nws tuaj yeem muab cov zis CW siv ntau yam laser nce. Txhawm rau kom ua tiav qhov tunability, qhov nruab nrab nce uas tuaj yeem npog qhov ntau ntawm lub hom phiaj wavelength yuav tsum tau xaiv.

2. Lub laser CW uas hloov tau

Cov lasers ntiv nplhaib tau siv ntev los ua kom tau txais cov zis CW los ntawm ib hom longitudinal, nrog rau spectral bandwidth hauv kilohertz ntau yam. Zoo ib yam li cov lasers sawv ntsug, cov lasers ntiv nplhaib tunable kuj tseem siv tau cov xim thiab titanium sapphire ua cov khoom siv tau. Cov xim tuaj yeem muab qhov dav ntawm kab nqaim heev tsawg dua 100 kHz, thaum titanium sapphire muab qhov dav ntawm kab tsawg dua 30 kHz. Qhov ntau ntawm cov xim laser yog 550 txog 760 nm, thiab ntawm titanium sapphire laser yog 680 txog 1035 nm. Cov zis ntawm ob hom lasers tuaj yeem ua ob npaug rau UV band.

3. Hom-xauv quasi-txuas ntxiv laser

Rau ntau daim ntawv thov, kev txhais kom meej txog lub sijhawm ntawm cov zis laser yog qhov tseem ceeb dua li kev txhais kom meej txog lub zog. Qhov tseeb, kev ua tiav cov pulses luv luv xav tau qhov kev teeb tsa qhov nrog ntau hom longitudinal resonating tib lub sijhawm. Thaum cov cyclic longitudinal hom no muaj kev sib raug zoo theem ruaj khov hauv lub laser qhov, lub laser yuav raug hom-xauv. Qhov no yuav ua rau ib lub pulse kom oscillate hauv lub qhov, nrog nws lub sijhawm txhais los ntawm qhov ntev ntawm lub laser qhov. Active mode-locking tuaj yeem ua tiav siv ib qhoacousto-optic modulator(AOM), lossis passive mode-locking tuaj yeem ua tiav los ntawm Kerr lens.

4. Ultrafast ytterbium laser

Txawm hais tias titanium sapphire lasers muaj kev siv dav dav, qee qhov kev sim duab txog tsiaj txhu xav tau cov wavelengths ntev dua. Ib qho txheej txheem nqus ob-photon feem ntau yog excited los ntawm photons nrog wavelength ntawm 900 nm. Vim tias cov wavelengths ntev dua txhais tau tias tsawg dua scattering, cov wavelengths excitation ntev dua tuaj yeem tsav tsheb zoo dua cov kev sim tsiaj txhu uas xav tau qhov tob tob dua.

Niaj hnub nim no, cov lasers uas kho tau tau siv rau ntau qhov chaw tseem ceeb, xws li kev tshawb fawb txog kev tshawb fawb yooj yim mus rau kev tsim laser thiab kev tshawb fawb txog lub neej thiab kev noj qab haus huv. Cov thev naus laus zis uas muaj tam sim no dav heev, pib los ntawm cov kab ke CW yooj yim, uas nws txoj kab nqaim tuaj yeem siv rau kev ntsuas siab, kev ntes molecular thiab atomic, thiab kev sim quantum optics, muab cov ntaub ntawv tseem ceeb rau cov kws tshawb fawb niaj hnub no. Cov tuam txhab tsim laser niaj hnub no muab cov kev daws teeb meem ib zaug, muab cov zis laser uas nthuav dav tshaj 300 nm hauv qhov ntau ntawm nanojoule zog. Cov kab ke nyuaj dua nthuav dav dav ntawm 200 txog 20,000 nm hauv qhov ntau ntawm microjoule thiab millijoule zog.