Silicon photonicszvikamu zvisingashande
Kune zvikamu zvakakosha zvakati wandei mu silicon photonics. Chimwe cheizvi i surface-emitting grating coupler, sezvakaratidzwa muMufananidzo 1A. Inosanganisira sturdiness grating mu waveguide ine nguva yakaenzana ne wavelength ye light wave mu waveguide. Izvi zvinobvumira chiedza kuti chibudiswe kana kugamuchirwa chakatarisana nepamusoro, zvichiita kuti chive chakakodzera kuyerwa kwe wafer-level uye/kana kubatana ne fiber. Grating couplers dzakasiyana ne silicon photonics nekuti dzinoda high vertical index contrast. Semuenzaniso, kana ukaedza kugadzira grating coupler mu conventional InP waveguide, chiedza chinodonhera zvakananga mu substrate pane kuti chibudiswe chakamira nekuti grating waveguide ine avhareji yakaderera ye refractive index pane substrate. Kuti ishande muInP, zvinhu zvinofanirwa kucherwa pasi pe grating kuti zviisungirire, sezvakaratidzwa muMufananidzo 1B.
Mufananidzo 1: ma "one-dimensional grating couplers" anoburitsa pamusoro pe "one-dimensional grating couplers" mu "silicon" (A) ne "InP" (B). Mu "(A), grey" ne "light blue" zvinomirira "silicon" ne "silica", zvichiteerana. Mu "(B), tsvuku ne "orenji" zvinomirira "InGaAsP" ne "InP", zvichiteerana. Mifananidzo (C) ne "D" iri kuskena mifananidzo ye "electron microscope" (SEM) ye "InP suspended cantilever grating coupler".
Chimwe chinhu chakakosha iSpot-size converter (SSC) pakati pegwara remafungu emazisouye fiber, iyo inoshandura modhi inosvika 0.5 × 1 μm2 mu silicon waveguide kuita modhi inosvika 10 × 10 μm2 mu fiber. Nzira yakajairika ndeyekushandisa chimiro chinonzi inverse taper, umo waveguide inotetepa zvishoma nezvishoma kuita muromo mudiki, izvo zvinoguma nekuwedzera kukuru kwechiedzachigamba chemodhi. Iyi modhi inogona kubatwa negirazi rakarembera, sezvakaratidzwa muMufananidzo 2. NeSSC yakadaro, kurasikirwa kwekubatanidza kuri pasi pe1.5dB kunowanikwa zviri nyore.
Mufananidzo 2: Chinoshandura saizi yemapatani ekufambisa mafungu esimbi esimbi yesimbi yesimbi yesimbi. Chinhu chesimbi yesimbi inoumba chimiro chakatenderedzwa mukati mekufambisa mafungu esimbi yesimbi yesimbi yesimbi. Chinhu chesimbi yesimbi yesimbi yakachekwa pasi pekufambisa mafungu esimbi yesimbi yesimbi yesimbi.
Chinhu chakakosha chinoshandiswa passive ndicho chinoparadzanisa mwenje wepolarization. Mimwe mienzaniso yezvinoparadzanisa polarization inoratidzwa muMufananidzo 3. Chekutanga iMach-Zender interferometer (MZI), uko ruoko rumwe nerumwe rune birefringence yakasiyana. Chechipiri i coupler iri nyore. Birefringence yechimiro che typical silicon wire waveguide yakakwira zvikuru, saka transverse magnetic (TM) polarized light inogona kubatanidzwa zvizere, nepo transverse electrical (TE) polarized light inogona kunge isina kubatana. Chechitatu i grating coupler, umo fiber inoiswa paAngle kuitira kuti TE polarized light ibatane kune rumwe rutivi uye TM polarized light ibatane kune rumwe rutivi. Chechina i two-dimensional grating coupler. Fiber modes dzine magetsi akatarisana negwara rekupararira kwewaveguide dzakabatana kune waveguide inoenderana. Fiber inogona kutsveyamiswa uye kubatanidzwa kune waveguides mbiri, kana kuti yakatarisana nepamusoro uye kubatanidzwa kune waveguides ina. Chimwe chinhu chakanaka pamusoro pema "two-dimensional grating couplers" ndechekuti anoshanda se "polarization rotators", zvichireva kuti chiedza chose chiri pa "chip" chine "polarization" yakafanana, asi "orthogonal polarizations" mbiri dzinoshandiswa mu "fiber".
Mufananidzo 3: Zviputsi zvepolarization zvakawanda.
Nguva yekutumira: Chikunguru-16-2024