Chirongwa chekudzikisa frequency ye optical chakavakirwa paMZM modulator

Chirongwa chekudzikisa frequency ye optical chakavakirwa paMugadziri weMZM

Kupararira kwe optical frequency kunogona kushandiswa se liDARchiedza chinobvakuburitsa nekuskena panguva imwe chete munzira dzakasiyana, uye inogona zvakare kushandiswa senzvimbo yemwenje ine mafungu akawanda e800G FR4, ichibvisa chimiro cheMUX. Kazhinji, nzvimbo yemwenje ine mafungu akawanda ine simba shoma kana kuti haina kurongedzwa zvakanaka, uye kune matambudziko akawanda. Chirongwa chakatangwa nhasi chine mabhenefiti akawanda uye chinogona kutaurwa nezvacho senzira yekutarisa. Dhayagiramu yechimiro chayo inoratidzwa seinotevera: Simba guruLaser yeDFBChitubu chechiedza iCW chiedza chiri munzvimbo yenguva uye single wavelength iri mufrequency. Mushure mekupfuura nepakati pemodulatorne frequency ye modulation fRF, sideband ichagadzirwa, uye sideband interval ndiyo modulated frequency fRF. Modulator inoshandisa LNOI modulator ine urefu hwe 8.2mm, sezvakaratidzwa muMufananidzo b. Mushure mechikamu chirefu che high-powermodulator yechikamu, frequency ye modulation i fRF zvakare, uye phase yayo inofanira kuita crest kana trough yeRF signal uye light pulse zvakabatana, zvichikonzera chirp yakakura, zvichikonzera mazino akawanda e optical. DC bias uye modulation depth ye modulator zvinogona kukanganisa flatness ye optical frequency dispersion.

Pamasvomhu, chiratidzo mushure mekunge munda wechiedza wagadziriswa ne modulator ndeichi:
Zvinogona kuonekwa kuti nzvimbo inobuda optical field i optical frequency dispersion ine frequency interval ye wrf, uye simba re optical frequency dispersion zino rine chekuita nesimba re DFB optical. Nekutevedzera simba rechiedza richipfuura nepa MZM modulator uyePM phase modulator, uyezve FFT, optical frequency dispersion spectrum inowanikwa. Mufananidzo unotevera unoratidza hukama hwakananga pakati pe optical frequency flatness uye modulator DC bias uye modulation depth zvichibva pane iyi simulation.

Mufananidzo unotevera unoratidza dhayagiramu yespectral yakaedzwa ine MZM bias DC ye0.6π uye kudzika kwemodulation kwe0.4π, zvinoratidza kuti flatness yayo iri <5dB.

Inotevera ndiyo dhayagiramu yepakeji yeMZM modulator, LN ine ukobvu hwe500nm, kudzika kwe etching kuri 260nm, uye upamhi hwe waveguide i1.5um. Ukobvu hwe gold electrode i1.2um. Ukobvu hwe upper cladding SIO2 i2um.

Zvinotevera ndizvo zvakaita OFC yakaedzwa, ine mazino gumi nematatu asina kunyatsojeka uye kusasimba <2.4dB. Kuchinja kwemagetsi i5GHz, uye RF power loading muMZM nePM i11.24 dBm uye 24.96dBm zvichiteerana. Huwandu hwemazino e optical frequency dispersion excitation hunogona kuwedzerwa nekuwedzera simba rePM-RF, uye optical frequency dispersion interval inogona kuwedzerwa nekuwedzera modulation frequency.
Zviri pamusoro apa zvakavakirwa pachirongwa cheLNOI, uye zvinotevera zvakavakirwa pachirongwa cheIIIV. Dhayagiramu yechimiro ndeiyi inotevera: Chip iyi inobatanidza DBR laser, MZM modulator, PM phase modulator, SOA neSSC. Chip imwe chete inogona kuita kuti frequency ye optical iite zvakanaka.

SMSR yelaser yeDBR i35dB, upamhi hwemutsetse i38MHz, uye nzvimbo yekugadzirisa i9nm.

Modulator yeMZM inoshandiswa kugadzira sideband ine urefu hwe1mm uye bandwidth ye7GHz@3dB chete. Inogumira zvakanyanya nekuda kwekusawirirana kweimpedance, kurasikirwa kwemaziso kusvika ku20dB@-8B bias.

Kureba kweSOA i500µm, iyo inoshandiswa kutsiva kurasikirwa kwemodulation optical difference, uye bandwidth yespectral i62nm@3dB@90mA. SSC yakabatanidzwa pakubuda inovandudza kushanda kwekubatanidza kwechip (kushanda kwekubatanidza i5dB). Simba rekupedzisira rekubuda rinenge −7dBm.

Kuti pave nekupararira kwema frequency e optical, frequency yeRF modulation inoshandiswa i2.6GHz, simba i24.7dBm, uye Vpi ye phase modulator i5V. Mufananidzo uri pazasi ndiwo spectrum ye photophobic ine mazino gumi nemanomwe e photophobic @10dB uye SNSR yakakwira kupfuura 30dB.

Chirongwa ichi chakagadzirirwa kutumira ma microwave e5G, uye mufananidzo unotevera ndiwo chikamu che spectrum chinoonekwa ne light detector, chinogona kugadzira masaini e26G nekagumi kupfuura frequency. Hazvina kutaurwa pano.

Muchidimbu, mafrequency e optical anokonzerwa nenzira iyi ane frequency interval yakagadzikana, ruzha rwakaderera, simba rakawanda uye nyore kubatanidzwa, asi kunewo matambudziko akati wandei. RF signal yakaiswa paPM inoda simba guru, simba rakawanda rinoshandiswa, uye frequency interval inogumira pa modulation rate, kusvika ku50GHz, iyo inoda wavelength interval yakakura (kazhinji >10nm) muFR8 system. Kushandiswa kushoma, simba rakatsetseka harina kukwana.