Silicon Photonic Passion Txheej txheem

Silicon partonicsKob ua ke

Muaj ob peb lub ntsiab lus passive hauv silicon photonics. Ib qho ntawm cov no yog lub ntsej muag sib luag, raws li qhia hauv daim duab 1a. Nws muaj kev sib haum xeeb hauv WaveGuide uas nws lub sijhawm yog kwv yees li ntawm lub teeb ntawm lub teeb nthwv dej hauv WaveGuide. Qhov no tso cai rau lub teeb kom tau tawm los yog tau txais perpendicular mus rau saum npoo, ua rau nws zoo tagnrho rau wafer-qib ntsuas thiab / los txuas rau cov fiber. Grating couplers yog qee qhov tshwj xeeb rau Silicon photonics nyob rau hauv uas lawv xav tau kev sib piv cov kev sib piv siab sib piv. Piv txwv li, yog tias koj sim ua kom sib haum sib tsoo hauv cov pa hluav taws xob uas tsis muaj qab zib vim tias qhov kev sib tsoo uas muaj qhov qis dua qhov ntsuas hluav taws xob tsawg dua li lub substrate. Txhawm rau ua kom nws ua haujlwm hauv Inp, cov khoom yuav tsum tau khawb hauv qab lub grating kom ncua nws, raws li qhia hauv daim duab 1b.

Daim duab 1: Qhov chaw khoob khoob khoob khoob khoob khoob khoob tso rau hauv silicon (a) thiab inp (b). Hauv (a), grey thiab lub teeb xiav sawv cev ntsiag to silicon thiab silica, ntsig txog. Hauv (b), liab thiab txiv kab ntxwv sawv cev angaasp thiab inp, feem. Cov nuj nqis (C) thiab (d) yog scanning Electron tsom iav tsom (sem) cov duab ntawm ib tus inpetred cantilever grating coupler coupler coupler coupler coupler.

Lwm qhov tseem ceeb tseem ceeb yog qhov chaw-loj hloov (SSC) ntawm covKho qhov muag WaveGuideThiab cov fiber ntau, uas hloov dua hom ntawm txog 0.5 × 1 μm2 hauv Silicon WaveGuide rau ib hom ntawm txog 10 × 10 μm2 hauv cov fiber. Ib txoj kev yog yog siv tus qauv hu ua Uperse taper, uas cov WaveGuide maj mam ua rau maj mam ua rau ib qho kev nthuav dav me me, uas ua rau muaj kev nthuav dav tseem ceebntawm qhov muagHom Phaj. Hom no tuaj yeem ntes tau los ntawm lub khob tshem tawm WaveGuide, raws li qhia hauv daim duab 2. Nrog rau SSC li cas tsawg dua 1.5dB tau yooj yim.

Daim duab 2: Txawv loj dua converter rau silicon xaim yoj waveguides. Silicon cov khoom siv cov qauv ib qho kev sib txuas lus sib txuas hauv cov iav tshem tawm WaveGuide. Silicon subttrate tau ovched deb hauv qab lub iav tshem tawm iav WaveGuide.

Qhov tseem ceeb passive tivthaiv feem yog polarization nqaj spitter. Qee cov piv txwv ntawm polarization spritters tau qhia hauv daim duab 3. Thawj yog ib qho ua ntej yog tus tsim Mach-Zender interferometer (MZI), qhov twg txhua caj npab muaj ib qho sib txawv birefringence. Qhov thib ob yog ib qho kev coj ua yooj yim. Cov duab birffringence ntawm ib txwm silicon xaim yoj waveGuide yog siab heev, yog li transverse lub teeb tau tuaj yeem yog qhov sib nqus hluav taws xob tuaj yeem yuav luag tsis muaj peev xwm ua tau. Qhov thib peb yog ib txoj kev sib haum sib tsoo, uas cov fiber ntau muab tso rau ntawm kaum sab xis yog li cov kev coj ua thiab TM polarized lub teeb yog coupled nyob rau hauv lwm. Plaub yog ob-seem grating coupler. Fiber ntau cov qauv uas nws cov hluav taws xob txuas rau cov kev coj ntawm WaveGuide propagation yog txuas rau WaveGuide. Cov fiber tuaj yeem tsim tau tilted thiab txuas txuas rau ob qho chaw yoj, lossis sib tshuam mus rau saum npoo thiab txuas rau plaub yoj yoj. Ib qho txiaj ntsig ntxiv ntawm ob-seem grating couplers yog tias lawv ua raws li lub ntsej muag rotators muaj tib lub ntsej muag zoo ib yam, tab sis ob lub orthogonal polarizations tau siv nyob rau hauv cov fiber.

Daim duab 3: Ntau yam polarization splitters.