Kev Taw Qhia Txog Cov Qauv thiab Kev Ua Haujlwm ntawmThin Film Lithium Niobate Electro optic Modulator
An electro-optic modulatorraws li cov qauv sib txawv, wavelengths, thiab platforms ntawm zaj duab xis nyias lithium niobate, thiab kev sib piv kev ua tau zoo ntawm ntau homCov modulators EOMthiab kev tshawb nrhiav thiab kev siv cov ntaub ntawv, thiabcov lithium niobate modulators uas siv cov zaj duab xis nyias nyiashauv lwm qhov teb.
1. Cov khoom siv lithium niobate modulator uas tsis muaj resonant cavity
Hom modulator no yog raws li qhov zoo heev electro-optic nyhuv ntawm lithium niobate siv lead ua thiab yog ib qho cuab yeej tseem ceeb rau kev ua tiav kev sib txuas lus optical ceev thiab ntev. Muaj peb lub qauv tseem ceeb:
1.1 Kev mus ncig nthwv dej electrode MZI modulator: Qhov no yog qhov tsim qauv feem ntau. Pawg tshawb fawb Lon č ar ntawm Harvard University thawj zaug ua tiav qhov kev ua tau zoo hauv xyoo 2018, nrog rau kev txhim kho tom qab suav nrog kev thauj khoom capacitive raws li quartz substrates (bandwidth siab tab sis tsis sib xws nrog silicon-based) thiab silicon-based sib xws raws li substrate hollowing, ua tiav bandwidth siab (> 67 GHz) thiab lub teeb liab ceev ceev (xws li 112 Gbit / s PAM4) kev sib kis.
1.2 Lub MZI modulator uas quav tau: Yuav kom luv qhov loj ntawm lub cuab yeej thiab hloov kho rau cov modules me me xws li QSFP-DD, kev kho polarization, cross waveguide lossis inverted microstructure electrodes siv los txo qhov ntev ntawm lub cuab yeej los ntawm ib nrab thiab ua tiav bandwidth ntawm 60 GHz.
1.3 Ib Leeg/Dual Polarization Coherent Orthogonal (IQ) Modulator: Siv hom ntawv modulation siab los txhim kho tus nqi xa tawm. Pawg tshawb fawb Cai ntawm Sun Yat sen University tau ua tiav thawj lub on-chip ib leeg polarization IQ modulator hauv xyoo 2020. Lub dual polarization IQ modulator tsim yav tom ntej muaj kev ua tau zoo dua, thiab cov version raws li quartz substrate tau teeb tsa cov ntaub ntawv xa tawm ib qho wavelength ntawm 1.96 Tbit / s.
2. Resonant cavity hom nyias-zaj duab xis lithium niobate modulator
Yuav kom ua tiav cov bandwidth modulators me me thiab loj, muaj ntau yam qauv resonant cavity muaj:
2.1 Photonic crystal (PC) thiab micro ring modulator: Lin pawg tshawb fawb ntawm University of Rochester tau tsim thawj lub photonic crystal modulator ua haujlwm siab. Tsis tas li ntawd, micro ring modulators raws li silicon lithium niobate heterogeneous integration thiab homogeneous integration kuj tau raug pom zoo, ua tiav bandwidths ntawm ntau GHz.
2.2 Bragg grating resonant cavity modulator: suav nrog Fabry Perot (FP) cavity, waveguide Bragg grating (WBG), thiab slow light (SL) modulator. Cov qauv no yog tsim los kom sib npaug qhov loj me, kev ua haujlwm, thiab kev ua tau zoo, piv txwv li, 2 × 2 FP resonant cavity modulator ua tiav bandwidth loj heev tshaj 110 GHz. Lub slow light modulator raws li kev sib txuas Bragg grating nthuav dav ntau yam bandwidth ua haujlwm.
3. Heterogeneous integrated nyias zaj duab xis lithium niobate modulator
Muaj peb txoj kev sib koom ua ke tseem ceeb los ua ke qhov sib xws ntawm CMOS thev naus laus zis ntawm cov platforms silicon nrog kev ua tau zoo heev ntawm lithium niobate:
3.1 Hom kev sib koom ua ke heterogeneous: Los ntawm kev sib txuas ncaj qha nrog benzocyclobutene (BCB) lossis silicon dioxide, zaj duab xis nyias lithium niobate raug xa mus rau silicon lossis silicon nitride platform, ua tiav qib wafer, kev sib koom ua ke kub siab. Lub modulator qhia txog bandwidth siab (> 70 GHz, txawm tias tshaj 110 GHz) thiab muaj peev xwm xa cov teeb liab ceev ceev.
3.2 Kev tso cov khoom siv waveguide sib txawv: kev tso silicon lossis silicon nitride rau ntawm cov zaj duab xis nyias lithium niobate ua lub load waveguide kuj ua tiav kev hloov kho electro-optic zoo.
3.3 Micro hloov luam ntawv (μ TP) heterogeneous kev koom ua ke: Qhov no yog ib qho thev naus laus zis uas xav tias yuav siv rau kev tsim khoom loj, uas hloov cov khoom siv ua haujlwm prefabricated mus rau lub hom phiaj chips los ntawm cov khoom siv siab, zam kev ua tiav tom qab nyuaj. Nws tau ua tiav siv rau silicon nitride thiab silicon-based platforms, ua tiav bandwidths ntawm kaum tawm GHz.
Hauv kev xaus lus, tsab xov xwm no qhia txog txoj kev siv tshuab ntawm cov electro-optic modulators raws li cov txheej txheem nyias nyias lithium niobate, los ntawm kev ua raws li cov qauv kev ua haujlwm siab thiab cov kab ke loj uas tsis muaj resonant, tshawb nrhiav cov qauv resonant me me, thiab kev koom ua ke nrog cov txheej txheem photonic silicon uas loj hlob. Nws qhia txog lub peev xwm loj heev thiab kev nce qib tas mus li ntawm cov txheej txheem nyias nyias lithium niobate modulators hauv kev tawg los ntawm qhov kev ua tau zoo ntawm cov modulators ib txwm muaj thiab ua tiav kev sib txuas lus optical ceev ceev.
Lub sijhawm tshaj tawm: Lub Peb Hlis-31-2026