Cov txiaj ntsig zoo ntawm cov yeeb yaj kiab nyias lithium niobate hauv kev sib xyaw microwave photon technology
Microwave Photon Tshuabmuaj qhov zoo ntawm kev ua haujlwm loj bandwidth, muaj zog ua kev muaj peev xwm thiab txhim kho kev ua haujlwm ntawm cov khoom siv hluav taws xob cov tub rog thiab kev sib tw hluav taws xob, kev sib tw thiab ntsuas thiab tswj. Txawm li cas los xij, microwave photon system raws li cov cuab yeej discrete muaj qee cov teeb meem xws li ntim cov ntaub ntawv loj, uas pheej muaj zog ntawm microwave caton technology hauv spaceborne thiab huab cua platforms. Yog li ntawd, sib xyaw ua ke microwave photon technology yog ua ib qho kev txhawb nqa tseem ceeb los tsoo lub microwave xov xwm thiab muab tag nrho cov kev ua si ntawm microwave photon technology.
Ntawm tam sim no, kev sib xyaw ua si photonic sib xyaw ua ke thiab thev naus laus zis sib xyaw ua ke ntau dua, thiab ntau cov khoom lag luam tau muab tso rau hauv kev ua lag luam. Txawm li cas los xij, rau daim ntawv thov Microwave photonies thev naus laus zis, piv txwv li nonline sib xyaw ua ke rau cov yam ntxwv loj thiab cov yam ntxwv loj loj ua raws li microwave photon tshuab; Piv txwv li, cov khoom siv kho qhov muag uas tau hloov kho kho qhov muag, muaj cov teeb meem qeeb nrawm, siv hluav taws xob qeeb, kev siv hluav taws xob qeeb, uas tsis tuaj yeem ntsib kev nrawm Beam scanning thiab loj array nplai microwave photon kev siv.
Lithium niobate yeej ib txwm yog thawj qhov kev xaiv rau kev kub ceevElectro-Optic HloovCov ntaub ntawv vim tias nws zoo heev linear Electro-optic nyhuv. Txawm li cas los xij, cov tsoos lithium niobateElectro-Optical Modulatoryog ua los ntawm cov tawv nqaij lithale miobate crystal, thiab cov cuab yeej loj yog qhov loj heev, uas tsis tuaj yeem ua kom tau raws li cov kev xav tau ntawm microwave photon technology. Yuav ua li cas sib txuas ua ke lithium niobate cov ntaub ntawv nrog linear Electro-Optical coeffe-optical poton technology system tau dhau los ua lub hom phiaj ntawm cov kws tshawb nrhiav ntawm. Hauv kev tshawb fawb hauv Harvard University hauv Tebchaws Meskas tau tshaj tawm txog qhov kev sib koom ua ke, vim tias cov cuab yeej siv hluav taws xob siab, thiab kab hluav taws xob loj ntawm electro -Txoj kev cuam tshuam, ib zaug tsim tawm, nws tam sim ntawd ua rau kev kawm thiab kev saib xyuas hauv kev sib xyaw ua ke ntawm photonic ntawm photonic kev sib xyaw thiab microwave photonics. Los ntawm cov kev pom ntawm microwave photon daim ntawv thov, cov ntawv no tshuaj xyuas cov kev sib xyaw thiab cov yeeb yaj kiab nyias raws li kev txhim kho microwave photon technology.
Nyias Zaj Duab Xis Lithium Niobate Khoom thiab nyias zaj duab xisLithium Niobate Modulator
Nyob rau hauv ob xyoos tsis ntev los no, ib qho tshiab ntawm lithium niobate cov khoom tau tawm, uas yog, lub lithium niobate ua yeeb yaj kiab los ntawm cov si wafer nrog silica ntas yeej txheej rau ua lnoi (linbo3-on-insulator) khoom [5], uas yog hu ua cov yeeb yaj kiab nyias lithium niobate cov khoom nyob rau hauv no ntawv. Ridge WaveGuides nrog qhov siab ntawm ntau dua 100 nanometers tuaj yeem ua yeeb yaj kiab wordguated los tau mus txog ntau dua 0.8 (deb siab dua li qhov kev ntsuas kom rov ua qhov kev ntsuas lithium niobate flutguides ntawm 0.02), raws li muaj nyob hauv daim duab 1. Qhov kev txwv tsis pub siv WaveGuide ua kom yooj yim kom phim lub teeb ci nrog lub microwave teb thaum tsim qauv cov qauv. Yog li, nws tau txais txiaj ntsig tau ua kom tiav qis dua kev nyab xeeb voltage thiab kev sib cav loj dua bandwidth hauv luv ntev.
Cov tsos ntawm qis qis lithium niobate submicon waveGuide so lub cev tsav tsheb voltage ntawm cov lithium niobate electro-optic modulator. Cov electrode spring tuaj yeem txo mus rau ~ 5 μm, thiab kev sib tshooj ntawm hluav taws xob thiab tus txiv neej kho kom tsawg dua 20 v · cm mus tsawg dua 2.8 vm. Yog li ntawd, nyob rau hauv tib ib nrab-yoj voltage, qhov ntev ntawm lub cuab yeej tuaj yeem tau txo zoo sib piv nrog cov modulator ib txwm muaj. Nyob rau tib lub sijhawm, tom qab ua kom zoo dua cov tsis dav, thickness thiab luv ntawm cov muaj peev xwm ntawm ultra-siab kev sib cais bandwidth loj dua 100 ghaz.
Fig.1 (a) Xam hom kev xa tawm thiab (B) duab ntawm kev hla ntawm LN WaveTGuide
Daim duab.2 (a) WaveGuide thiab cov qauv electrode thiab (b) coreplate ntawm LN modulator
Qhov sib piv ntawm cov yeeb yaj kiab nyias lithium niobate modulators nrog cov modulators thiab lwm yam tseem ceeb ntawm kev sib piv suav nrog suav nrog:
(1) Ib nrab yoj-nthwv dej volt-ntev khoom (Vπ · eff, ntsuas kev ntsuas kev ua haujlwm ntawm cov modulator, ntsuas tus nqi me me, qhov ntau dua qhov ua tau zoo;
(2) 3 DB Kev Ntsuam Xyuas Bandwidth (GHz), uas ntsuas cov lus teb ntawm Modulator mus rau cov kev hloov kho siab;
(3) Kev nqus cov khoom siv kho qhov muag (DB) hauv cheeb tsam tsheb. Nws tuaj yeem pom ntawm lub rooj uas nyias zaj duab xis Lithium niobate modulator tau zoo nyob rau hauv kev sib zog bandwidth, ib nrab yoj voltage, optical interpolation poob thiab li ntawd.
Silicon, raws li lub pob zeb ntawm kev sib xyaw Optoelectronics, tau tsim kom deb li deb, nws cov txheej txheem sib xyaw ua ke, nws cov miniaturator tau dav thiab tob tob hauv thaj chaw ntawm Optical Kev sib txuas lus. Lub Electro-Optical hloov me ntsis ntawm silicon yog feem ntau Carrier depling-tion, cov cab kuj kev txhaj tshuaj thiab cov cab kuj sib tsub. Ntawm lawv, bandwidth ntawm tus modulator yog qhov zoo tshaj plaws nrog txoj kab kev faib ua ke, tab sis vim hais tias cov kev sib cais ntawm cov tsis sib xws, tab sis vim tias qhov kev txiav txim siab kho qhov muag tsis sib xws thiab kev txiav txim siab thib peb intermodulation distortion cov ntsiab lus, txuas nrog cov txiaj ntsig kev nqus ntawm cov cab kuj ntawm lub teeb, uas yuav ua rau qhov txo ntawm kev hloov kho kho qhov muag thiab teeb liab distortion.
Tus Inp Modulator muaj cov qauv tsim kho kho kom zoo, thiab cov txheej txheem tsav hluav taws xob ntau thiab cov tsav tsheb tsis tshua muaj rau 60.156V. Txawm li cas los xij, qhov sib txawv ntawm cov ntawv hluav taws xob ua kom muaj hluav taws xob nrog cov lus hluav taws xob, thiab cov khoom siv hluav taws xob tsis zoo yuav ua rau kev txiav txim hluav taws xob thib ob yuav ua rau muaj txiaj ntsig thib ob. Yog li ntawd, silicon thiab inp Electro-optic modulators yuav tsum tau thov bias kom tau pn kev sib tshuam thaum lawv ua haujlwm, thiab pn hlws ris peb ua haujlwm, thiab pn hlws yuav coj txoj kev ua tsis taus. Txawm li cas los xij, tus modulator me me ntawm ob qho me me, kev coj mus muag inp modulator loj yog 1/4 ntawm LN modulator. Muaj kev ua tau zoo, haum rau kev ntom ntom ntom ntom ntom thiab luv nrug digital kho qhov muag tau sib kis xws li cov chaw zov me nyuam. Lub electro-optical cuam tshuam ntawm Lithium Niobate tsis muaj lub teeb nqus kev nqus cov txheej txheem thiab tsis muaj kev poob qis, uas yog qhov tsim nyog rau kev sib tw ntevKev Sib Txuas Lusnrog lub peev xwm loj thiab tus nqi siab. Hauv microwave photon daim ntawv thov, lub Electro-Optical coefficients ntawm Si thiab Inp yog tsis haum rau lub microwave photin system uas tsis haum siab thiab muaj zog loj. Cov ntaub ntawv lithium niobate cov khoom siv tau haum rau microwave photon daim ntawv thov vim yog nws tag nrho cov khoom siv hluav taws xob tag nrho cov coefficient.
Ncua Sij Hawm: Apr-22-2024