I-modulator ye-electro-optic esebenza kahle kakhulu: i-modulator ye-lithium niobate yefilimu encane

I-modulator ye-electro-optic esebenza kahle kakhulu:i-lithium niobate modulator yefilimu encane

I-modulator ye-electro-optical (I-modulator ye-EOM) iyi-modulator eyenziwe kusetshenziswa umphumela we-electro-optical wamakristalu athile e-electro-optical, angaguqula amasignali kagesi asheshayo kumadivayisi okuxhumana abe amasignali optical. Lapho ikristalu ye-electro-optic ifakwa ensimini kagesi esetshenzisiwe, inkomba yokukhanya kwekristalu ye-electro-optic izoshintsha, futhi izici zamagagasi optical zekristalu nazo zizoshintsha ngokufanele, ukuze kubonakale ukuguqulwa kwesimo se-amplitude, isigaba kanye ne-polarization yesignali yokukhanya, futhi kuguqulwe isignali ye-electronic eshesha kakhulu kudivayisi yokuxhumana ibe isignali yokukhanya ngokusebenzisa i-modulation.

Okwamanje, kunezinhlobo ezintathu eziyinhloko ze-ama-modulators e-electro-opticemakethe: ama-modulators asekelwe ku-silicon, ama-modulators e-indium phosphide kanye nefilimu encanei-modulator ye-lithium niobatePhakathi kwazo, i-silicon ayinayo i-coefficient eqondile ye-electro-optical, ukusebenza kwayo kubanzi kakhulu, ifaneleka kuphela ekukhiqizweni kwemoduli ye-transceiver yokudlulisa idatha ebangeni elifushane, i-indium phosphide yize ifaneleka kwimoduli ye-transceiver yenethiwekhi yokuxhumana ye-optical ebangeni eliphakathi nendawo, kodwa izidingo zenqubo yokuhlanganisa ziphakeme kakhulu, izindleko ziphezulu kakhulu, uhlelo lokusebenza lungaphansi kwemikhawulo ethile. Ngokuphambene nalokho, ikristalu ye-lithium niobate ayicebile kuphela ngomphumela we-photoelectric, umphumela we-set photorefractive, umphumela ongeyona i-linear, umphumela we-electro-optical, umphumela we-acoustic optical, umphumela we-piezoelectric kanye nomphumela we-thermoelectric zilingana nenye, futhi ngenxa yesakhiwo sayo se-lattice kanye nesakhiwo sayo esicebile se-defect, izakhiwo eziningi ze-lithium niobate zingalawulwa kakhulu ngokwakhiwa kwekristalu, i-doping ye-element, ukulawulwa kwesimo se-valence, njll. Ukufinyelela ukusebenza okuphezulu kwe-photoelectric, njenge-coefficient ye-electro-optical efika ku-30.9pm/V, ephakeme kakhulu kune-indium phosphide, futhi inomphumela omncane we-chirp (umphumela we-chirp: ubhekisela esimweni sokuthi imvamisa ngaphakathi kwe-pulse iyashintsha ngokuhamba kwesikhathi ngesikhathi senqubo yokudlulisa i-laser pulse. Umphumela omkhulu we-chirp uphumela kusilinganiso esiphansi sesignali-kuya-kumsindo kanye nomphumela ongeyona i-linear), isilinganiso esihle sokuphela (isilinganiso samandla esimaphakathi sesimo "sokuvuliwe" sesignali esimweni sayo "sokuvala"), kanye nokuzinza kwedivayisi okuphezulu. Ngaphezu kwalokho, indlela yokusebenza ye-thin film lithium niobate modulator ihlukile kuneye-silicon-based modulator kanye ne-indium phosphide modulator esebenzisa izindlela ze-nonlinear modulation, esebenzisa umphumela we-linear electro-optical ukulayisha isignali eguquliwe ngogesi ku-optical carrier, futhi izinga lokuguquguquka linqunywa kakhulu ukusebenza kwe-microwave electrode, ngakho-ke isivinini sokuguquguquka esiphezulu kanye nokulingana kanye nokusetshenziswa kwamandla okuphansi kungafinyelelwa. Ngokusekelwe kulokhu okungenhla, i-lithium niobate isibe ukukhetha okuhle kokulungiselela ama-modulators e-electro-optic asebenza kahle kakhulu, anezinhlelo zokusebenza eziningi kumanethiwekhi okuxhumana e-100G/400G ahlangene kanye nezikhungo zedatha zesivinini esikhulu kakhulu, futhi ingafinyelela amabanga amade okudlulisela angaphezu kwamakhilomitha ayi-100.

I-Lithium niobate njengento egumbuqelayo ye-"photon revolution", yize uma iqhathaniswa ne-silicon ne-indium phosphide inezinzuzo eziningi, kodwa ivame ukuvela ngesimo sezinto eziningi kudivayisi, ukukhanya kukhawulelwe ku-plane waveguide eyakhiwe ukusabalala kwe-ion noma i-proton exchange, umehluko we-refractive index uvame ukuba mncane kakhulu (cishe u-0.02), usayizi wedivayisi mkhulu kakhulu. Kunzima ukuhlangabezana nezidingo ze-miniaturization kanye nokuhlanganiswa kwe-amadivayisi optical, futhi umugqa wayo wokukhiqiza usahlukile kumugqa wenqubo we-microelectronics wangempela, futhi kunenkinga yezindleko eziphakeme, ngakho-ke ukwakheka kwefilimu encane kuyisiqondiso esibalulekile sokuthuthukiswa kwe-lithium niobate esetshenziswa kuma-modulators e-electro-optical.