Iskimu se-optical frequency thinning esekwe kwimodyuli ye-MZM

Iskimu se-optical frequency thinning esekelwe kwiImodyuli ye-MZM

I-optical frequency dispersion ingasetyenziswa njenge-liDARumthombo wokukhanyaukukhupha kunye nokuskena ngexesha elifanayo kwiindlela ezahlukeneyo, kwaye ingasetyenziselwa njengomthombo wokukhanya obuninzi be-wavelength ye-800G FR4, ukuphelisa isakhiwo se-MUX.Ngesiqhelo, umthombo wokukhanya wamaza amaninzi unokuba ngamandla aphantsi okanye awupakishwanga kakuhle, kwaye kukho iingxaki ezininzi.Iskimu esaziswa namhlanje sineengenelo ezininzi kwaye sinokubhekiswa kuso ukuze sibhekiselelwe kuso.Umzobo wesakhiwo sawo uboniswa ngolu hlobo lulandelayo: Amandla aphezuluDFB laserUmthombo wokukhanya kukukhanya kwe-CW kwi-domain yexesha kunye nobude be-waveleng enye kumaza.Emva kokudlula kwi-aimodyulingefrikhwensi ethile yokumodareyitha, ibhande elisecaleni liyakwenziwa, kwaye ikhefu lebhanti esecaleni limodified frequency fRF.Imodareyitha isebenzisa imodyuli ye-LNOI enobude obuyi-8.2mm, njengoko kubonisiwe kuMfanekiso b.Emva kwecandelo elide lamandla aphezuluimodyuli yesigaba, ukumodareyitha rhoqo kukwayi-fRF, kwaye isigaba saso sifuna ukwenza i-crest okanye umkhombe we-RF umqondiso kunye ne-pulse yokukhanya ehambelana enye kwenye, ekhokelela kwi-chirp enkulu, ekhokelela kumazinyo okukhanya ngakumbi.I-DC bias kunye nobunzulu bokumodareyitha kwemodyuli inokuchaphazela ukuthambeka kokusasazeka kwamatyeli okukhanya.

Ngokwezibalo, umqondiso emva kokuba indawo yokukhanya imodareyithwe yimodyuli yile:
Inokubonwa ukuba intsimi ye-optical ephumayo yi-optical frequency dispersion kunye ne-frequency interval ye-wrf, kunye nobukhulu bezinyo le-optical frequency dispersion tooth linxulumene namandla optical e-DFB.Ngokufanisa ukukhanya kokukhanya okudlula kwimodyuli ye-MZM kunyeImodyuli yesigaba se-PM, kwaye ke i-FFT, i-optical frequency dispersion spectrum ifunyenwe.Lo mzobo ulandelayo ubonisa unxulumano oluthe ngqo phakathi kokubonakala okuthe tyaba okubonakalayo kunye nemodyuli ye-DC bias nobunzulu bokumodareyitha okusekwe kolu kulinganisa.

Lo mfanekiso ulandelayo ubonisa umzobo we-spectral owenziweyo kunye ne-MZM bias DC ye-0.6π kunye nobunzulu be-modulation ye-0.4π, ebonisa ukuba flatness yayo <5dB.

Oku kulandelayo ngumzobo wephakheji ye-modulator ye-MZM, i-LN yi-500nm ubukhulu, ubunzulu be-etching yi-260nm, kunye nobubanzi be-waveguide yi-1.5um.Ubukhulu be-electrode yegolide yi-1.2um.Ubukhulu bomgangatho ophezulu we-SIO2 yi-2um.

Oku kulandelayo yi-spectrum ye-OFC evavanyiweyo, enamazinyo ali-13 e-optically sparse kunye nokunyuka <2.4dB.I-modulation frequency yi-5GHz, kunye nokulayisha amandla e-RF kwi-MZM kunye ne-PM yi-11.24 dBm kunye ne-24.96dBm ngokulandelelanayo.Inani lamazinyo osasazo lwe-optical frequency dispersion excitation linokongezwa ngokunyusa amandla e-PM-RF, kunye nekhefu lokusasazwa kwe-optical frequency linokongezwa ngokunyusa amaza okutshintsha.umfanekiso
Oku kungasentla kusekelwe kwisikimu se-LNOI, kwaye oku kulandelayo kusekelwe kwi-IIVV scheme.Umzobo wesakhiwo ngolu hlobo lulandelayo: I-chip idibanisa i-laser ye-DBR, i-modulator ye-MZM, i-modulator yesigaba se-PM, i-SOA kunye ne-SSC.I-chip enye inokufezekisa ukusebenza okuphezulu kokuncitshiswa kwe-optical frequency.

I-SMSR ye-laser ye-DBR yi-35dB, ububanzi bomgca ngu-38MHz, kunye noluhlu lokulungisa luyi-9nm.

Imodyuli ye-MZM isetyenziselwa ukuvelisa i-sideband kunye nobude be-1mm kunye ne-bandwidth ye-7GHz@3dB kuphela.Ikakhulu ithintelwe kukungahambelani kwe-impedance, ilahleko yamehlo ukuya kuthi ga kwi-20dB@-8B bias

Ubude be-SOA yi-500µm, esetyenziselwa ukubuyisela ilahleko yemodulation ye-optical difference, kunye ne-spectral bandwidth yi-62nm@3dB@90mA.I-SSC edibeneyo kwisiphumo iphucula ukudibanisa ukusebenza kakuhle kwe-chip (ubuchule bokudibanisa yi-5dB).Amandla okugqibela emveliso amalunga −7dBm.

Ukuze kuveliswe i-optical frequency dispersion, i-RF modulation frequency esetyenzisiweyo yi-2.6GHz, amandla yi-24.7dBm, kunye ne-Vpi yemodyuli yesigaba yi-5V.Umfanekiso ongezantsi ngumphumela we-photophobic spectrum kunye ne-17 amazinyo e-photophobic @10dB kunye ne-SNSR ephezulu kune-30dB.

Iskimu sihloselwe ukuhanjiswa kwe-microwave ye-5G, kwaye lo mfanekiso ulandelayo yinxalenye ye-spectrum efunyenwe ngumtshina wokukhanya, onokuvelisa izibonakaliso ze-26G ngamaxesha angama-10.Akuchazwanga apha.

Isishwankathelo, i-frequency optical eyenziwa yile ndlela ine-stable interval, ingxolo yesigaba esiphantsi, amandla aphezulu kunye nokudibanisa okulula, kodwa kukho iingxaki ezininzi.Isiginali yeRF elayishwe kwi-PM ifuna amandla amakhulu, ukusetyenziswa kwamandla amakhulu ngokwentelekiso, kwaye ikhefu lekhefu lilinganiselwe yireyithi yokumodareyitha, ukuya kuthi ga kwi-50GHz, efuna ikhefu elikhulu le-wavelength (ngokubanzi > 10nm) kwinkqubo yeFR8.Ukusetyenziswa okulinganiselweyo, ukuthambeka kwamandla akwanelanga.