02electro-optic modulatorthiabkev hloov kho hluav taws xoblub zog zaus kho qhov muag
Cov nyhuv electro-optical yog hais txog cov nyhuv uas qhov refractive index ntawm cov khoom siv hloov pauv thaum lub zog hluav taws xob raug siv. Muaj ob hom electro-optical effect tseem ceeb, ib qho yog qhov tseem ceeb electro-optical effect, tseem hu ua Pokels effect, uas yog hais txog kev hloov pauv ntawm cov khoom siv refractive index nrog lub zog hluav taws xob siv. Qhov thib ob yog qhov thib ob electro-optical effect, tseem hu ua Kerr effect, uas qhov kev hloov pauv ntawm qhov refractive index ntawm cov khoom siv yog proportional rau lub square ntawm lub zog hluav taws xob. Feem ntau cov electro-optical modulators yog raws li Pokels effect. Siv cov electro-optic modulator, peb tuaj yeem hloov kho theem ntawm lub teeb pom kev, thiab raws li theem modulation, los ntawm qee qhov kev hloov pauv, peb kuj tuaj yeem hloov kho qhov muaj zog lossis polarization ntawm lub teeb.
Muaj ntau ntau hom qauv sib txawv, raws li pom hauv Daim Duab 2. (a), (b) thiab (c) yog cov qauv modulator ib leeg nrog cov qauv yooj yim, tab sis qhov dav ntawm cov comb zaus optical tsim tawm yog txwv los ntawm electro-optical bandwidth. Yog tias xav tau lub comb zaus optical nrog cov zaus rov ua dua siab, ob lossis ntau dua modulators yuav tsum tau ua cascade, raws li pom hauv Daim Duab 2 (d) (e). Hom qauv kawg uas tsim lub comb zaus optical hu ua electro-optical resonator, uas yog lub electro-optical modulator tso rau hauv lub resonator, lossis lub resonator nws tus kheej tuaj yeem tsim cov nyhuv electro-optical, raws li pom hauv Daim Duab 3.
DUAB 2 Ntau yam khoom siv sim rau kev tsim cov teeb pom kev zoo raws licov khoom siv hluav taws xob-optic modulators
DUAB 3 Cov qauv ntawm ntau lub qhov hluav taws xob-optical
03 Cov yam ntxwv ntawm Electro-optic modulation optical frequency comb
Qhov zoo ib: kev hloov pauv tau
Vim tias lub teeb ci yog lub laser dav dav uas tuaj yeem hloov kho tau, thiab lub electro-optical modulator kuj muaj qee qhov bandwidth ua haujlwm zaus, lub electro-optical modulation optical frequency comb kuj tuaj yeem hloov kho zaus. Ntxiv nrog rau qhov zaus hloov kho tau, txij li thaum lub waveform generation ntawm lub modulator tuaj yeem hloov kho tau, qhov zaus rov ua dua ntawm qhov tshwm sim optical frequency comb kuj tuaj yeem hloov kho tau. Qhov no yog qhov zoo uas cov optical frequency combs tsim los ntawm mode-locked lasers thiab micro-resonators tsis muaj.
Qhov zoo thib ob: qhov zaus rov ua dua
Tus nqi rov ua dua tsis yog tsuas yog hloov pauv tau xwb, tab sis kuj tuaj yeem ua tiav yam tsis tas hloov cov khoom siv sim. Qhov dav ntawm cov kab hluav taws xob electro-optic modulation optical frequency comb yog kwv yees li sib npaug rau modulation bandwidth, feem ntau cov lag luam electro-optic modulator bandwidth yog 40GHz, thiab electro-optic modulation optical frequency comb repetition frequency tuaj yeem tshaj qhov optical frequency comb bandwidth tsim los ntawm txhua txoj kev tshwj tsis yog micro resonator (uas tuaj yeem ncav cuag 100GHz).
Qhov Zoo 3: kev ua duab spectral
Piv nrog rau cov zuag hluav taws xob uas tsim los ntawm lwm txoj kev, cov duab ntawm cov zuag hluav taws xob electro-optic modulated optical yog txiav txim siab los ntawm ntau qib kev ywj pheej, xws li lub teeb liab zaus xov tooj cua, qhov hluav taws xob bias, qhov xwm txheej polarization, thiab lwm yam, uas tuaj yeem siv los tswj qhov muaj zog ntawm cov zuag sib txawv kom ua tiav lub hom phiaj ntawm kev ua kom pom tseeb.
04 Daim ntawv thov ntawm electro-optic modulator optical zaus comb
Hauv kev siv ua haujlwm ntawm electro-optic modulator optical frequency comb, nws muaj peev xwm muab faib ua ib qho thiab ob qho comb spectra. Qhov sib nrug ntawm ib qho comb spectrum yog nqaim heev, yog li qhov tseeb siab tuaj yeem ua tiav. Tib lub sijhawm, piv rau qhov sib nrug ntawm optical frequency comb uas tsim los ntawm mode-locked laser, lub cuab yeej ntawm electro-optic modulator optical frequency comb yog me dua thiab zoo dua tunable. Lub double comb spectrometer yog tsim los ntawm kev cuam tshuam ntawm ob lub coherent ib qho combs nrog me ntsis repetition frequencys sib txawv, thiab qhov sib txawv ntawm repetition frequency yog qhov sib nrug ntawm kab ntawm cov interference comb spectrum tshiab. Optical frequency comb technology tuaj yeem siv rau hauv optical imaging, rangeing, thickness measurement, instrument calibration, arbitrary waveform spectrum shaping, radio frequency photonics, remote communication, optical stealth thiab lwm yam.
DUAB 4 Daim ntawv thov ntawm optical frequency comb: Piv txwv li, siv qhov ntsuas ntawm high-speed bullet profile.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-19-2023