Uhlelo lokunciphisa imvamisa yokukhanya olusekelwe ku-modulator ye-MZM

Uhlelo lokunciphisa imvamisa yokukhanya olusekelwe kuI-modulator ye-MZM

Ukusabalala kwemvamisa ye-optical kungasetshenziswa njenge-liDARumthombo wokukhanyaukukhipha nokuskena ngasikhathi sinye ngezindlela ezahlukene, futhi ingasetshenziswa njengomthombo wokukhanya we-800G FR4 onamagagasi amaningi, okususa isakhiwo se-MUX. Ngokuvamile, umthombo wokukhanya we-multi-wavelength unamandla aphansi noma awupakishwanga kahle, futhi kunezinkinga eziningi. Uhlelo olwethulwe namuhla lunezinzuzo eziningi futhi lungabhekiselwa kulo njengereferensi. Umdwebo wesakhiwo salo uboniswa kanje: Amandla aphezuluI-laser ye-DFBUmthombo wokukhanya ukukhanya kwe-CW endaweni yesikhathi kanye nobude besikhathi obulodwa ku-frequency. Ngemva kokudlula ku-i-modulatornge-frequency ethile ye-modulation fRF, kuzokhiqizwa i-sideband, kanti isikhawu se-sideband yi-frequency eguquliwe fRF. I-modulator isebenzisa i-modulator ye-LNOI enobude obungu-8.2mm, njengoba kuboniswe kuMfanekiso b. Ngemva kwengxenye ende yamandla aphezului-modulator yesigaba, imvamisa yokuguquguquka nayo iyi-fRF, futhi isigaba sayo sidinga ukwenza i-crest noma i-trough yesiginali ye-RF kanye ne-pulse yokukhanya ehlobene, okuholela ekushayweni okukhulu, okuholela emazinyweni amaningi okukhanya. Ukuthambekela kwe-DC kanye nokujula kokuguquguquka kwe-modulator kungathinta ukuthamba kokusabalala kwe-optical frequency dispersion.

Ngokwezibalo, isignali ngemva kokuba insimu yokukhanya ishintshiwe yi-modulator yile:
Kungabonakala ukuthi insimu ye-optical yokukhipha iyi-optical frequency dispersion ene-frequency interval ye-wrf, futhi amandla ezinyo le-optical frequency dispersion ahlobene namandla e-DFB optical. Ngokulingisa amandla okukhanya adlula nge-MZM modulator kanyeI-modulator yesigaba se-PM, bese kuba yi-FFT, kutholakala i-optical frequency dispersion spectrum. Lesi sibalo esilandelayo sibonisa ubudlelwano obuqondile phakathi kwe-optical frequency flatness kanye ne-modulator DC bias kanye nokujula kwe-modulation ngokusekelwe kulokhu kulingisa.

Isithombe esilandelayo sibonisa umdwebo we-spectral olingiswayo one-MZM bias DC engu-0.6π kanye nokujula kokuguquguquka okungu-0.4π, okubonisa ukuthi ukuthamba kwawo ku-<5dB.

Okulandelayo umdwebo wephakheji we-MZM modulator, i-LN iwugqinsi oluyi-500nm, ukujula kokuqopha kungama-260nm, kanti ububanzi be-waveguide buyi-1.5um. Ugqinsi lwe-electrode yegolide luyi-1.2um. Ugqinsi lwe-SIO2 engenhla luyi-2um.

Okulandelayo yi-spectrum ye-OFC evivinyiwe, enamazinyo ayi-13 angabonakali kahle kanye nokuba flat <2.4dB. Imvamisa yokuguquguquka ingu-5GHz, kanti ukulayisha kwamandla e-RF ku-MZM kanye ne-PM kungu-11.24 dBm kanye no-24.96dBm ngokulandelana. Inani lamazinyo okusabalalisa imvamisa yokukhanya lingandiswa ngokwandisa amandla e-PM-RF, kanye ne-interval yokusabalalisa imvamisa yokukhanya ingandiswa ngokwandisa imvamisa yokuguquguquka.
Lokhu okungenhla kusekelwe kuhlelo lwe-LNOI, kanti okulandelayo kusekelwe kuhlelo lwe-IIIV. Umdwebo wesakhiwo umi kanje: I-chip ihlanganisa i-DBR laser, i-MZM modulator, i-PM phase modulator, i-SOA kanye ne-SSC. I-chip eyodwa ingafinyelela ukuncipha kwemvamisa ye-optical esebenza kahle kakhulu.

I-SMSR ye-laser ye-DBR ingu-35dB, ububanzi bomugqa bungu-38MHz, kanti ububanzi bokuhlela bungu-9nm.

I-modulator ye-MZM isetshenziselwa ukukhiqiza i-sideband enobude obungu-1mm kanye ne-bandwidth engu-7GHz@3dB kuphela. Inqunyelwe kakhulu yi-impedance mismatch, ukulahleka kwe-optical kufika ku-20dB@-8B bias.

Ubude be-SOA bungu-500µm, obusetshenziselwa ukukhokhela ukulahlekelwa komehluko we-modulation optical, kanti i-bandwidth ye-spectral ingu-62nm@3dB@90mA. I-SSC ehlanganisiwe ekuphumeni ithuthukisa ukusebenza kahle kokuxhuma kwe-chip (ukusebenza kahle kokuxhuma kungu-5dB). Amandla okukhipha okugcina angaba ngu-−7dBm.

Ukuze kukhiqizwe ukusabalala kwemvamisa yokukhanya, imvamisa yokuguqulwa kwe-RF esetshenziswayo ingu-2.6GHz, amandla angu-24.7dBm, kanti i-Vpi ye-phase modulator ingu-5V. Isithombe esingezansi yi-photophobic spectrum ephumelayo enamazinyo angu-17 athanda ukukhanya @10dB kanye ne-SNSR ephakeme kune-30dB.

Lolu hlelo luhloselwe ukudluliselwa kwe-microwave ye-5G, kanti lesi sibalo esilandelayo yi-spectrum component etholwe yisitholi sokukhanya, esingakhiqiza amasignali angu-26G ngokuphindwe kayishumi kunemvamisa. Akushiwo lapha.

Ngamafuphi, imvamisa yokukhanya ekhiqizwa yile ndlela inesikhathi esizinzile semvamisa, umsindo wesigaba ophansi, amandla aphezulu kanye nokuhlanganiswa okulula, kodwa futhi kunezinkinga eziningana. Isignali ye-RF elayishwe ku-PM idinga amandla amakhulu, ukusetshenziswa kwamandla okukhulu, futhi isikhathi semvamisa sinqunyelwe yisilinganiso sokuguquguquka, kufika ku-50GHz, okudinga isikhathi esikhulu se-wavelength (ngokuvamile >10nm) ohlelweni lwe-FR8. Ukusetshenziswa okulinganiselwe, ukuthamba kwamandla akukanele.