Lithium tantalate (LTOI) kumhanya kwakanyanyamodulator yemagetsi-optic
Kufamba kwedata pasi rose kuri kuramba kuchikura, zvichikonzerwa nekushandiswa kwakapararira kwetekinoroji itsva dzakadai se5G uye artificial intelligence (AI), izvo zvinounza matambudziko makuru kune ma transceivers pamatanho ese e optical networks. Kunyanya, tekinoroji yechizvarwa chinotevera ye electro-optic modulator inoda kuwedzera kukuru kwehuwandu hwedata hunosvika 200 Gbps muchiteshi chimwe chete uku ichideredza kushandiswa kwesimba nemari. Mumakore mashoma apfuura, tekinoroji ye silicon photonics yave ichishandiswa zvakanyanya mumusika we optical transceiver, kunyanya nekuda kwekuti silicon photonics inogona kugadzirwa zvakanyanya uchishandisa CMOS process yakakura. Nekudaro, ma SOI electro-optic modulators anovimba ne carrier dispersion anotarisana nematambudziko makuru mu bandwidth, simba rinoshandiswa, free carrier absorption uye modulation nonlinearity. Dzimwe nzira dzetekinoroji muindasitiri dzinosanganisira InP, thin film lithium niobate LNOI, electro-optical polymers, uye dzimwe multi-platform heterogeneous integration solutions. LNOI inoonekwa semhinduro inogona kuwana kushanda kwakanakisa mukumhanya kwakanyanya uye low power modulation, zvisinei, parizvino ine mamwe matambudziko maererano nemaitiro ekugadzira akawanda uye mutengo. Munguva pfupi yapfuura, timu iyi yakatanga puratifomu ye "thin film lithium tantalate (LTOI)" ine photonic platform ine maficha akanaka e photoelectric uye kugadzirwa kukuru, iyo inotarisirwa kuenzana kana kutopfuura mashandiro e "lithium niobate" uye "silicon optical platforms" mumashandisirwo akawanda. Zvisinei, kusvika pari zvino, chinhu chikuru che "core device" chekutaurirana kwemaziso, modulator ye electro-optic inomhanya zvakanyanya, haina kusimbiswa muLTOI.
Muchidzidzo ichi, vaongorori vakatanga vagadzira LTOI electro-optic modulator, iyo chimiro chayo chinoratidzwa muMufananidzo 1. Kuburikidza nekugadzirwa kwechimiro chechikamu chega chega che lithium tantalate pa insulator uye ma parameter e microwave electrode, kuenderana kwekumhanya kwe microwave ne light wave mumodulator yemagetsi-opticalZvinowanikwa. Panyaya yekuderedza kurasikirwa kwe microwave electrode, vaongorori mubasa iri kekutanga vakakurudzira kushandiswa kwesirivha sechinhu chinofambisa magetsi chine conductivity iri nani, uye sirivha electrode yakaratidzwa kuderedza kurasikirwa kwe microwave kusvika 82% zvichienzaniswa ne electrode yegoridhe inoshandiswa zvakanyanya.
Mufananidzo 1 Chimiro cheLTOI electro-optic modulator, dhizaini yekufananidza phase, bvunzo yekurasikirwa kwe microwave electrode.
Mufananidzo 2 unoratidza mudziyo wekuyedza uye mhedzisiro yeLTOI electro-optic modulator yesimba rakagadziriswaKuongororwa kwakananga (IMDD) mumasisitimu ekutaurirana kwemaziso. Kuedza uku kunoratidza kuti LTOI electro-optic modulator inogona kutumira masaini ePAM8 pachiyero che176 GBd neBER yakayerwa ye3.8×10⁻² pasi pe25% SD-FEC threshold. Kune ese ari maviri 200 GBd PAM4 ne208 GBd PAM2, BER yaive yakaderera zvakanyanya pane threshold ye15% SD-FEC ne7% HD-FEC. Mhedzisiro yekuyedza eye nehistogram muMufananidzo 3 inoratidza zvakajeka kuti LTOI electro-optic modulator inogona kushandiswa mumasisitimu ekukurukurirana anomhanyisa ane linearity yakakwira uye low bit error rate.
Mufananidzo 2 Kuedza uchishandisa LTOI electro-optic modulator yeKusimba kwakagadziridzwaKuona Zvakananga (IMDD) mu optical communication system (a) mudziyo wekuyedza; (b) Kuyera kwe bit error rate (BER) ye PAM8 (tsvuku), PAM4 (girini) uye PAM2 (bhuruu) zviratidzo sebasa rechiratidzo; (c) Kuyera kweruzivo rwunogoneka (AIR, dashed line) uye associated net data rate (NDR, solid line) yezviyero zvine bit-error rate values pasi pe 25% SD-FEC limit; (d) Mapu emaziso uye statistical histograms pasi pe PAM2, PAM4, PAM8 modulation.
Basa iri rinoratidza modulator yekutanga yeLTOI electro-optic modulator ine bandwidth ye3 dB ye110 GHz. Mukuongorora kweImDD transmission, mudziyo uyu unowana chiyero chedata checarrier che405 Gbit/s, chinoenzana nekushanda kwakanakisa kwemapuratifomu emagetsi aripo akadai seLNOI nemaplasma modulators. Mune ramangwana, uchishandisa mamwe mamodheru akaomarara.modulator yeIQmagadzirirwo kana matekiniki ekugadzirisa zvikanganiso zvechiratidzo akanyanya kufambira mberi, kana kushandisa ma substrates ekurasikirwa ne microwave akaderera akadai se quartz substrates, zvishandiso zve lithium tantalate zvinotarisirwa kuwana mwero wekutaurirana we 2 Tbit/s kana kupfuura. Pamwe chete nemabhenefiti chaiwo e LTOI, akadai se birefringence yakaderera uye mhedzisiro yehukuru nekuda kwekushandiswa kwayo kwakapararira mune mamwe misika yeRF filter, tekinoroji ye lithium tantalate photonics ichapa mhinduro dzakachipa, dzine simba shoma uye dzinomhanya zvakanyanya kune network dzekukurukurirana dzinomhanya nekukurumidza dzechizvarwa chinotevera uye masisitimu e microwave photonics.
Nguva yekutumira: Zvita-11-2024