Kev sib piv ntawm photonic integrated circuit material systems

Kev sib piv ntawm photonic integrated circuit material systems
Daim duab 1 qhia txog kev sib piv ntawm ob cov khoom siv, indium Phosphorus (InP) thiab silicon (Si). Qhov tsis tshua muaj ntawm indium ua rau InP cov khoom kim dua Si. Vim hais tias silicon-raws li circuits koom nrog kev loj hlob ntawm epitaxial tsawg dua, cov txiaj ntsig ntawm silicon-based circuits feem ntau yog siab dua li ntawm InP circuits. Hauv silicon-based circuits, germanium (Ge), uas feem ntau tsuas yog siv hauvPhotodetector(lub teeb ntes), yuav tsum muaj kev loj hlob ntawm epitaxial, thaum nyob rau hauv InP systems, txawm passive waveguides yuav tsum tau npaj los ntawm epitaxial loj hlob. Epitaxial kev loj hlob zoo li muaj qhov tsis xws luag ntau dua li kev loj hlob ib leeg, xws li los ntawm cov khoom siv lead ua. InP waveguides muaj siab refractive index contrast tsuas yog nyob rau hauv transverse, thaum silicon-raws li waveguides muaj siab refractive index contrast nyob rau hauv ob qho tib si transverse thiab longitudinal, uas tso cai rau silicon-raws li pab kiag li lawm mus cuag me me dabtsi yog khoov radii thiab lwm yam compact qauv. InGaAsP muaj qhov sib txawv ncaj qha, thaum Si thiab Ge tsis muaj. Raws li qhov tshwm sim, InP cov khoom siv tshuab tau zoo dua nyob rau hauv cov nqe lus ntawm laser efficiency. Intrinsic oxides ntawm InP systems tsis zoo li ruaj khov thiab muaj zog zoo li cov khoom siv oxides ntawm Si, silicon dioxide (SiO2). Silicon yog cov khoom siv muaj zog dua li InP, tso cai rau kev siv cov wafer loj, piv txwv li los ntawm 300 mm (tam sim no yuav hloov mus rau 450 mm) piv rau 75 mm hauv InP. InPmodulatorsfeem ntau yog nyob ntawm quantum-confined Stark nyhuv, uas yog kub-rhiab heev vim band ntug txav los ntawm kub. Nyob rau hauv sib piv, qhov kub dependence ntawm silicon-raws li modulators yog heev me me.

Silicon photonics thev naus laus zis feem ntau suav tias tsuas yog tsim nyog rau cov nqi qis, luv luv, cov khoom ntim siab (ntau dua 1 lab daim ib xyoos). Qhov no yog vim nws tau lees paub tias ntau lub peev xwm wafer yuav tsum tau nthuav tawm lub npog ntsej muag thiab cov nqi tsim kho, thiab qhov ntawdsilicon photonics technologymuaj qhov tsis zoo ntawm kev ua tau zoo hauv nroog-rau-lub nroog hauv cheeb tsam thiab cov khoom siv ntev ntev. Hauv kev muaj tiag, txawm li cas los xij, qhov sib txawv yog qhov tseeb. Nyob rau hauv tus nqi qis, luv luv, high-yield daim ntaub ntawv, ntsug kab noj hniav nto-emitting laser (VCSEL) thiabncaj-modulated laser (DML laser) : ncaj qha modulated laser ua rau muaj kev sib tw loj heev, thiab qhov tsis muaj zog ntawm silicon-based photonic thev naus laus zis uas tsis tuaj yeem yooj yim integrate lasers tau dhau los ua qhov tsis zoo. Nyob rau hauv sib piv, nyob rau hauv metro, ntev-nyob deb daim ntawv thov, vim qhov kev nyiam rau integrating silicon photonics technology thiab cov teeb liab ua (DSP) ua ke (uas yog feem ntau nyob rau hauv high kub ib puag ncig), nws yog zoo dua mus cais lub laser. Tsis tas li ntawd, coherent detection technology tuaj yeem ua rau qhov tsis txaus ntawm silicon photonics thev naus laus zis mus rau qhov loj, xws li qhov teeb meem uas qhov tsaus ntuj tam sim no me dua li lub zos oscillator photocurrent. Nyob rau tib lub sijhawm, nws tseem tsis yog qhov xav tias yuav tsum muaj peev xwm loj ntawm wafer los npog lub npog ntsej muag thiab cov nqi tsim kho, vim hais tias silicon photonics thev naus laus zis siv cov node qhov ntau thiab tsawg uas loj tshaj qhov ua tau zoo tshaj plaws ntawm cov hlau oxide semiconductors (CMOS), yog li cov qhov ncauj qhov ntswg yuav tsum tau thiab cov khoom siv tau raug pheej yig.