02 ibelectro-optic modulatorthiabelectro-optic modulationoptical zaus zuag
Electro-optical effect yog hais txog cov nyhuv uas qhov refractive index ntawm cov khoom hloov thaum siv hluav taws xob. Muaj ob yam tseem ceeb ntawm cov nyhuv electro-optical, ib qho yog thawj electro-optical effect, tseem hu ua Pokels effect, uas yog hais txog kev hloov pauv ntawm cov khoom siv refractive index nrog cov ntaub ntawv siv hluav taws xob. Lwm qhov yog qhov thib ob electro-optical nyhuv, tseem hu ua Kerr nyhuv, nyob rau hauv uas qhov kev hloov ntawm qhov refractive index ntawm cov khoom yog proportional rau lub square ntawm hluav taws xob teb. Feem ntau electro-optical modulators yog raws li Pokels nyhuv. Siv lub tshuab hluav taws xob-optic, peb tuaj yeem hloov kho theem ntawm qhov teeb meem teeb meem, thiab ntawm lub hauv paus ntawm theem kev hloov kho, los ntawm kev hloov dua siab tshiab, peb tuaj yeem hloov kho qhov siv los yog polarization ntawm lub teeb.
Muaj ntau ntau cov qauv sib txawv, raws li pom hauv daim duab 2. (a), (b) thiab (c) yog tag nrho cov qauv modulator nrog cov qauv yooj yim, tab sis txoj kab dav ntawm qhov generated optical zaus zuag yog txwv los ntawm electro-optical. bandwidth. Yog hais tias yuav tsum tau kho qhov muag zaus comb nrog siab repetition zaus, ob los yog ntau tshaj modulators yuav tsum tau nyob rau hauv cascade, raws li qhia nyob rau hauv daim duab 2(d)(e). Hom kawg ntawm cov qauv uas ua rau lub tshuab kho qhov muag zaus yog hu ua electro-optical resonator, uas yog lub tshuab hluav taws xob kho qhov muag muab 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.
FIG. 2 Ob peb qhov kev sim siv rau kev tsim kho qhov muag zaus combs raws lielectro-optic modulators
FIG. 3 Cov qauv ntawm ob peb electro-optical kab noj hniav
03 Electro-optic modulation optical zaus zuag yam ntxwv
Advantage ib: tunability
Txij li thaum lub teeb qhov chaw yog ib tug tunable wide-spectrum laser, thiab lub electro-optical modulator kuj muaj ib tug tej yam kev khiav hauj lwm zaus bandwidth, lub electro-optical modulation optical zaus zuag kuj yog zaus tunable. Ntxiv nrog rau qhov zaus tunable, txij li lub waveform tiam ntawm lub modulator yog tunable, repetition zaus ntawm lub resulting optical zaus zuag kuj yog tunable. Qhov no yog qhov kom zoo dua uas qhov ntau zaus combs tsim los ntawm hom-xauv lasers thiab micro-resonators tsis muaj.
Advantage ob: repetition zaus
Tus nqi rov ua dua tsis yog hloov pauv nkaus xwb, tab sis kuj tuaj yeem ua tiav yam tsis hloov cov cuab yeej sim. Cov kab dav ntawm electro-optic modulation optical zaus zuag yog roughly sib npaug rau qhov hloov pauv bandwidth, kev lag luam dav dav electro-optic modulator bandwidth yog 40GHz, thiab electro-optic modulation optical zaus comb repetition zaus tuaj yeem tshaj qhov optical zaus comb bandwidth tsim. los ntawm tag nrho lwm txoj kev tshwj tsis yog lub micro resonator (uas tuaj yeem ncav cuag 100GHz).
Qhov zoo 3: spectral shaping
Piv nrog rau qhov kho qhov muag comb tsim los ntawm lwm txoj kev, qhov kho qhov muag disc duab ntawm electro-optic modulated optical comb yog txiav txim siab los ntawm ntau qib ntawm kev ywj pheej, xws li xov tooj cua zaus teeb liab, tsis zoo voltage, teeb meem polarization, thiab lwm yam, uas tuaj yeem ua tau. siv los tswj qhov kev siv ntawm cov combs sib txawv kom ua tiav lub hom phiaj ntawm spectral shaping.
04 Daim ntawv thov ntawm electro-optic modulator optical zaus zuag
Nyob rau hauv daim ntawv thov ntawm electro-optic modulator optical zaus zuag, nws yuav muab faib ua ib leeg thiab ob chav comb spectra. Txoj kab sib nrug ntawm ib qho comb spectrum yog nqaim heev, yog li qhov tseeb siab tuaj yeem ua tiav. Nyob rau tib lub sij hawm, piv nrog optical zaus zuag ua los ntawm hom-xauv laser, cov cuab yeej ntawm electro-optic modulator optical zaus zuag yog me dua thiab zoo dua tunable. Ob chav zuag spectrometer yog tsim los ntawm kev cuam tshuam ntawm ob coherent ib combs nrog me ntsis sib txawv repetition zaus, thiab qhov sib txawv ntawm repetition zaus yog cov kab sib nrug ntawm cov tshiab cuam tshuam comb spectrum. Optical zaus zuag thev naus laus zis tuaj yeem siv rau hauv cov duab kho qhov muag, xws li, ntsuas qhov tuab, ntsuas ntsuas ntsuas, ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas, xov tooj cua zaus photonics, kev sib txuas lus chaw taws teeb, optical stealth thiab lwm yam.
FIG. 4 Daim ntawv thov scenario ntawm optical zaus zuag: Siv qhov ntsuas ntawm high-ceev mos txwv profile ua piv txwv
Post lub sij hawm: Dec-19-2023