Uhlelo lokunciphisa imvamisa yokubona olususelwe kumodelitha ye-MZM

Uhlelo lokunciphisa imvamisa ye-optical esekelweI-MZM module

I-optical frequency dispersion ingasetshenziswa njenge-liDARumthombo wokukhanyaukukhipha kanye nokuskena ngesikhathi esisodwa ngezindlela ezahlukene, futhi ingasetshenziswa njengomthombo wokukhanya wamaza amaningi we-800G FR4, ukuqeda isakhiwo se-MUX. Ngokuvamile, umthombo wokukhanya wamaza amaningi ungamandla aphansi noma awupakishwanga kahle, futhi kuba nezinkinga eziningi. Uhlelo olwethulwe namuhla lunezinzuzo eziningi futhi lungabhekiselwa kulo ukuze lusetshenziswe. Umdwebo wesakhiwo sawo uboniswa kanje: Amandla aphezuluI-DFB laserUmthombo wokukhanya ukukhanya kwe-CW kusizinda sesikhathi kanye nobude begagasi obubodwa kumaza. Ngemva kokudlula aimodulingefrikhwensi ethile yokushintshashintsha kwe-fRF, ibhendi eseceleni izokwenziwa, futhi isikhawu sebhande eseceleni yi-fRF eguquliwe. Imoduli isebenzisa imoduli ye-LNOI enobude obungu-8.2mm, njengoba kukhonjisiwe kuMfanekiso b. Ngemva kwesigaba eside samandla aphezului-modulator yesigaba, imvamisa yokushintshashintsha nayo iyi-fRF, futhi isigaba sayo sidinga ukwenza i-crest noma i-trough yesiginali ye-RF kanye nokushaya kwenhliziyo kokukhanya kuhlobane, okuholela ekutshiyoze okukhulu, okuholela emazinyweni abonakalayo. Ukuchema kwe-DC nokujula kokumodulayo kwemoduli kungathinta ukucaba kokuhlakazeka kwefrikhwensi yokubona.

Ngokwezibalo, isignali ngemva kokuthi inkambu yokukhanya ishintshiwe imoduli ithi:
Kungabonakala ukuthi inkambu ye-optical okukhiphayo iwukuhlakazeka kwefrikhwensi ye-optical ene-frequency interval ye-wrf, futhi ukuqina kwezinyo le-optical frequency dispersion tooth lihlobene namandla okubona e-DFB. Ngokulingisa amandla okukhanya adlula kumoduli ye-MZM kanyePM isigaba module, bese kuba yi-FFT, i-optical frequency dispersion spectrum iyatholakala. Isibalo esilandelayo sibonisa ubudlelwano obuqondile phakathi kwe-optical frequency flatness kanye nokuchema kwe-DC kwe-modulator nokujula kokushintshashintsha okusekelwe kulokhu kulingisa.

Isibalo esilandelayo sibonisa umdwebo we-spectral olingisiwe one-MZM bias DC engu-0.6π kanye nokujula kokushintshashintsha okungu-0.4π, okubonisa ukuthi ukucaba kwawo kungu-<5dB.

Okulandelayo umdwebo wephakheji we-modulator ye-MZM, i-LN ingu-500nm obukhulu, ukujula kwe-etching kungu-260nm, nobubanzi be-waveguide bungu-1.5um. Ugqinsi lwe-electrode yegolide luyi-1.2um. Ugqinsi lwendwangu engaphezulu ye-SIO2 ngu-2um.

Okulandelayo i-spectrum ye-OFC ehloliwe, enamazinyo ayi-13 agqagqene kanye nokuba flat <2.4dB. Imvamisa yokushintshashintsha ingu-5GHz, kanti amandla e-RF alayisha ku-MZM naku-PM ngu-11.24 dBm no-24.96dBm ngokulandelanayo. Inani lamazinyo e-optical frequency dispersion excitation linganyuswa ngokuqhubeka nokwandisa amandla e-PM-RF, futhi isikhawu sokuhlakazeka kwe-optical frequency singanyuswa ngokwandisa imvamisa yokushintshashintsha. isithombe
Okungenhla kusekelwe ohlelweni lwe-LNOI, futhi okulandelayo kusekelwe kuhlelo lwe-IIV. Umdwebo wesakhiwo umi kanje: I-chip ihlanganisa i-laser ye-DBR, i-modulator ye-MZM, i-modulator yesigaba se-PM, i-SOA ne-SSC. I-chip eyodwa ingafinyelela ukusebenza okuphezulu kwe-optical frequency thinning.

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

Imoduli ye-MZM isetshenziselwa ukukhiqiza ibhande eseceleni elinobude obungu-1mm kanye nomkhawulokudonsa ongu-7GHz@3dB kuphela. Ikakhulukazi ikhawulelwe ukungahambisani kahle kwe-impedance, ukulahleka kokubona kufika ku-20dB@-8B ukuchema

Ubude be-SOA bungu-500µm, obusetshenziselwa ukunxephezela ukulahleka komehluko we-modulation, kanye nomkhawulokudonsa we-spectral ngu-62nm@3dB@90mA. I-SSC ehlanganisiwe ekuphumeni ithuthukisa ukusebenza kahle kokuhlanganisa kwe-chip (ukusebenza kahle kokuhlanganisa kungu-5dB). Amandla okukhipha okugcina angaba ngu-−7dBm.

Ukuze kukhiqizwe i-optical frequency dispersion, i-RF modulation frequency esetshenziswayo ingu-2.6GHz, amandla angu-24.7dBm, kanti i-Vpi yemodulator yesigaba ingu-5V. Isibalo esingezansi siwumphumela we-photophobic spectrum enamazinyo e-photophobic angu-17 @10dB kanye ne-SNSR ephakeme kuno-30dB.

Uhlelo luhloselwe ukudluliswa kwe-microwave ye-5G, futhi isibalo esilandelayo siyingxenye ye-spectrum etholwe umtshina wokukhanya, ongakhiqiza amasignali angu-26G izikhathi ezingu-10 imvamisa. Akushiwo lapha.

Kafushane, imvamisa ye-optical ekhiqizwa yile ndlela inesikhawu esizinzile sokuvama, umsindo wesigaba esiphansi, amandla aphezulu nokuhlanganiswa okulula, kodwa futhi kunezinkinga ezimbalwa. Isignali ye-RF elayishwe ku-PM idinga amandla amakhulu, ukusetshenziswa kwamandla okukhulu kakhulu, futhi isikhawu sefrikhwensi sinqunyelwe izinga lokushintshashintsha, kufika ku-50GHz, okudinga isikhawu esikhulu se-wavelength (ngokuvamile >10nm) ohlelweni lwe-FR8. Ukusetshenziswa okulinganiselwe, amandla flatness akwanele.