Module yamagetsi yamagetsi yogwira ntchito kwambiri: module ya lithiamu niobate yopyapyala

Modulator yamagetsi yamagetsi yogwira ntchito bwino kwambiri:filimu yopyapyala ya lithiamu niobate modulator

Chowongolera chamagetsi ndi kuwala (electro-optical modulator)Chosinthira cha EOM) ndi modulator yopangidwa pogwiritsa ntchito mphamvu ya electro-optical ya makristalo ena a electro-optical, omwe amatha kusintha ma signal amagetsi othamanga kwambiri muzipangizo zolumikizirana kukhala ma signal optical. Pamene electro-optic crystal ikagwiritsidwa ntchito pamagetsi, chizindikiro cha refractive cha electro-optic crystal chidzasintha, ndipo mawonekedwe a mafunde a kristalo adzasinthanso moyenerera, kuti azindikire kusintha kwa amplitude, phase ndi polarization state ya chizindikiro cha optical, ndikusintha chizindikiro chamagetsi chothamanga kwambiri mu chipangizo cholumikizirana kukhala chizindikiro cha optical kudzera mu modulation.

Pakadali pano, pali mitundu itatu ikuluikulu yama modulators a electro-opticpamsika: ma modulators okhala ndi silicon, ma indium phosphide modulators ndi thin filmmodulator ya lithiamu niobatePakati pawo, silicon ilibe choyezera cha electro-optical mwachindunji, magwiridwe antchito ake ndi ambiri, ndi oyenera kupanga module ya transceiver ya data ya mtunda waufupi, indium phosphide ngakhale kuti ndi yoyenera pa module ya transceiver ya network yolumikizirana ya optical ya mtunda wapakati, koma zofunikira pakuphatikizana kwa njira ndizokwera kwambiri, mtengo wake ndi wokwera, ndipo kugwiritsa ntchito kwake kumakhala ndi zoletsa zina. Mosiyana ndi zimenezi, kristalo ya lithiamu niobate siili ndi mphamvu yokwanira ya photoelectric yokha, mphamvu yokhazikika ya photorefractive, mphamvu yosakhala yolunjika, mphamvu ya electro-optical, mphamvu ya acoustic optical, mphamvu ya piezoelectric ndi mphamvu ya thermoelectric ndi zofanana ndi chimodzi, ndipo chifukwa cha kapangidwe kake ka lattice ndi kapangidwe kake kolemera ka chilema, makhalidwe ambiri a lithiamu niobate amatha kulamulidwa kwambiri ndi kapangidwe ka kristalo, kugwiritsa ntchito mankhwala osokoneza bongo, kulamulira kwa valence state, ndi zina zotero. Kupeza mphamvu yokwanira ya photoelectric, monga coefficient ya electro-optical ya mpaka 30.9pm/V, yokwera kwambiri kuposa indium phosphide, ndipo ili ndi mphamvu yaying'ono ya chirp (chirp effect: imatanthauza chochitika chakuti ma frequency mkati mwa pulse amasintha pakapita nthawi panthawi yotumizira ma laser pulse. Mphamvu yayikulu ya chirp imabweretsa chiŵerengero chotsika cha chizindikiro-ku-phokoso ndi mphamvu yosakhala yolunjika), chiŵerengero chabwino cha kutha (chiŵerengero chapakati cha mphamvu ya chizindikiro cha "on" ku mkhalidwe wake wa "off"), ndi kukhazikika kwa chipangizo bwino. Kuphatikiza apo, njira yogwirira ntchito ya thin film lithium niobate modulator ndi yosiyana ndi ya silicon-based modulator ndi indium phosphide modulator pogwiritsa ntchito njira zosasinthasintha, zomwe zimagwiritsa ntchito linear electro-optical effect kuti zilowetse chizindikiro chosinthidwa ndi magetsi pa optical carrier, ndipo kuchuluka kwa modulation kumatsimikiziridwa makamaka ndi magwiridwe antchito a microwave electrode, kotero liwiro la modulation ndi linearity komanso kugwiritsa ntchito mphamvu zochepa zitha kuchitika. Kutengera zomwe zili pamwambapa, lithium niobate yakhala chisankho chabwino kwambiri chokonzekera ma electro-optic modulators apamwamba, omwe ali ndi ntchito zambiri mu ma network olumikizana a 100G/400G coherent optical ndi malo osungira deta othamanga kwambiri, ndipo amatha kufikira mtunda wautali wopitilira makilomita 100.

Lithium niobate ngati chinthu chosokoneza cha "photon revolution", ngakhale poyerekeza ndi silicon ndi indium phosphide ili ndi zabwino zambiri, koma nthawi zambiri imawonekera ngati chinthu chochuluka mu chipangizocho, kuwala kumangokhala pa plane waveguide yopangidwa ndi ion diffusion kapena proton exchange, kusiyana kwa refractive index nthawi zambiri kumakhala kochepa (pafupifupi 0.02), kukula kwa chipangizocho ndi kwakukulu. N'zovuta kukwaniritsa zosowa za miniaturization ndi kuphatikiza kwazipangizo zowunikira, ndipo mzere wake wopanga ukadali wosiyana ndi mzere weniweni wa njira zamagetsi, ndipo pali vuto la mtengo wokwera, kotero kupangidwa kwa filimu yopyapyala ndi njira yofunika kwambiri yopangira lithiamu niobate yomwe imagwiritsidwa ntchito mu ma modulators a electro-optical.