Iskimu se-optical frequency thinning esekelwe kwimodyuli ye-MZM

Iskimu se-optical frequency thinning esekelweImodyuli 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 sisetyenziswe. Umzobo wesakhiwo sayo 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 bemodyuli bunokuchaphazela ukuthambeka kwe-optical frequency dispersion.

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.