Inkqubo yokunciphisa i-optical frequency thinning esekwe kwi-MZM modulator

Inkqubo yokunciphisa i-optical frequency thinning esekelwe kwiImodulator ye-MZM

I-optical frequency dispersion ingasetyenziswa njenge-liDARumthombo wokukhanyaukukhupha nokuskena ngaxeshanye kwiindlela ezahlukeneyo, kwaye ingasetyenziswa njengomthombo wokukhanya we-800G FR4 onamaza amaninzi, ukususa isakhiwo se-MUX. Ngokwesiqhelo, umthombo wokukhanya we-multi-wavelength unamandla aphantsi okanye awupakishwanga kakuhle, kwaye kukho iingxaki ezininzi. Inkqubo engeniswe namhlanje ineenzuzo ezininzi kwaye inokubhekiswa kuyo njengereferensi. Umzobo wayo wesakhiwo uboniswe ngolu hlobo lulandelayo: Amandla aphezuluI-laser ye-DFBUmthombo wokukhanya kukukhanya kwe-CW kwindawo yexesha kunye nobude bomda omnye kwi-frequency. Emva kokudlula kwi-ai-modulatornge-modulation frequency ethile ye-fRF, i-sideband iya kuveliswa, kwaye i-sideband interval yi-modulated frequency fRF. I-modulator isebenzisa i-LNOI modulator enobude be-8.2mm, njengoko kubonisiwe kuMfanekiso b. Emva kwecandelo elide lamandla aphezuluimodyuli yesigaba, i-modulation frequency nayo yi-fRF, kwaye isigaba sayo kufuneka senze i-crest okanye i-trough yesignali ye-RF kunye ne-light pulse ehambelanayo, nto leyo ebangela i-chirp enkulu, nto leyo ebangela amazinyo abonakalayo ngakumbi. I-DC bias kunye nobunzulu be-modulation ye-modulator bunokuchaphazela ukuthamba kwe-optical frequency dispersion.

Ngokwezibalo, isignali emva kokuba intsimi yokukhanya ilungisiwe yi-modulator yile:
Kuyabonakala ukuba intsimi ye-optical output yi-optical frequency dispersion ene-frequency interval ye-wrf, kwaye amandla ezinyo le-optical frequency dispersion anxulumene namandla e-DFB optical. Ngokulinganisa amandla okukhanya adlula kwi-MZM modulator kunyeImodulator yesigaba se-PM, uze emva koko u-FFT, kufunyenwe i-optical frequency dispersion spectrum. Lo mfanekiso ulandelayo ubonisa ulwalamano oluthe ngqo phakathi kwe-optical frequency flatness kunye ne-modulator DC bias kunye nobunzulu be-modulation ngokusekelwe kolu simulation.

Lo mfanekiso ulandelayo ubonisa umzobo we-spectral olinganisiweyo one-MZM bias DC ye-0.6π kunye nobunzulu be-modulation be-0.4π, nto leyo ebonisa ukuba i-flatness yayo yi-<5dB.

Oku kulandelayo ngumzobo wephakheji ye-MZM modulator, i-LN inobukhulu obuyi-500nm, ubunzulu bokukrola buyi-260nm, kwaye ububanzi be-waveguide yi-1.5um. Ubukhulu be-electrode yegolide yi-1.2um. Ubukhulu be-SIO2 ye-cladding ephezulu yi-2um.

Oku kulandelayo yi-spectrum ye-OFC evavanyiweyo, enamazinyo ali-13 anqabileyo abonakala ngathi ayaguquguquka kwaye i-flatness ingaphantsi kwe-2.4dB. I-modulation frequency yi-5GHz, kwaye ukulayisha kwamandla e-RF kwi-MZM kunye ne-PM yi-11.24 dBm kunye ne-24.96dBm ngokwahlukeneyo. Inani lamazinyo e-optical frequency dispersion excitation linokwandiswa ngokunyusa amandla e-PM-RF, kwaye i-optical frequency dispersion interval inokwandiswa ngokunyusa i-modulation frequency.
Oku kungasentla kusekelwe kwisicwangciso se-LNOI, kwaye oku kulandelayo kusekelwe kwisicwangciso se-IIIV. Umzobo wolwakhiwo ngolu hlobo lulandelayo: Itshiphu idibanisa i-DBR laser, i-MZM modulator, i-PM phase modulator, i-SOA kunye ne-SSC. Itshiphu enye inokufezekisa ukuncitshiswa kwe-optical frequency esebenza kakuhle.

I-SMSR yelaser ye-DBR yi-35dB, ububanzi bomgca yi-38MHz, kwaye uluhlu lokulungisa yi-9nm.

I-MZM modulator isetyenziselwa ukuvelisa i-sideband enobude be-1mm kunye ne-bandwidth ye-7GHz@3dB kuphela. Inqunyelwe ikakhulu yi-impedance mismatch, ilahleko ye-optical ukuya kuthi ga kwi-20dB@-8B bias.

Ubude be-SOA yi-500µm, esetyenziselwa ukuhlawula ilahleko yomahluko we-optical modulation, kwaye i-bandwidth ye-spectral yi-62nm@3dB@90mA. I-SSC edibeneyo kwisiphumo iphucula ukusebenza kakuhle kwe-coupling ye-chip (ukusebenza kakuhle kwe-coupling yi-5dB). Amandla okugqibela okukhupha amalunga ne-−7dBm.

Ukuze kuveliswe i-optical frequency dispersion, i-RF modulation frequency esetyenzisiweyo yi-2.6GHz, amandla yi-24.7dBm, kwaye i-Vpi ye-phase modulator yi-5V. Umfanekiso ongezantsi yi-photophobic spectrum ephumayo enamazinyo ali-17 athanda ukukhanya @10dB kunye ne-SNSR ephezulu kune-30dB.

Le nkqubo yenzelwe ukuhanjiswa kwe-microwave ye-5G, kwaye umfanekiso olandelayo yi-spectrum component efunyenwe yi-light detector, enokuvelisa imiqondiso ye-26G ngokuphindwe kalishumi kune-frequency. Akuchazwanga apha.

Ngamafutshane, i-optical frequency eveliswa yile ndlela ine-frequency interval ezinzileyo, ingxolo yesigaba esiphantsi, amandla aphezulu kunye nokuhlanganiswa okulula, kodwa kukwakho neengxaki ezininzi. Isignali ye-RF elayishwe kwi-PM ifuna amandla amakhulu, ukusetyenziswa kwamandla amakhulu, kwaye i-frequency interval inqunyelwe yi-modulation rate, ukuya kuthi ga kwi-50GHz, efuna i-wavelength interval enkulu (ngokubanzi >10nm) kwinkqubo ye-FR8. Ukusetyenziswa okulinganiselweyo, i-power flatness ayisanele.