Silicon Optical modulator yeFMCW

Silicon Optical modulatorzve FMCW

Sezvatinoziva tese, chimwe chezvakanyanya kukosha muFMCW-yakavakirwa Lidar masisitimu ndiyo yakakwira mutsara modulator. Nheyo yekushanda kwayo inoratidzwa mumufananidzo unotevera: KushandisaDP-IQ modulatorbasedsingle sideband modulation (SSB), kumusoro uye pasiMZMshanda panzvimbo isina maturo, mumugwagwa uye pasi pedivi bhendi rewc + wm uye WC-WM, wm ndiyo modulation frequency, asi panguva imwe chete chiteshi chezasi chinounza 90 madhigirii chikamu musiyano, uye pakupedzisira mwenje weWC-WM. yakadzimwa, chete frequency shift nguva yewc + wm. Mumufananidzo b, LR bhuruu ndiyo yemuno FM chirp siginecha, RX orenji ndiyo inoratidzwa chiratidzo, uye nekuda kweiyo Doppler mhedzisiro, yekupedzisira kurova chiratidzo inoburitsa f1 uye f2.

Chinhambwe nekumhanya ndezvi:

Chinotevera chinyorwa chakaburitswa neShanghai Jiaotong University muna 2021, nezveSSBjenareta dzinoshandisa FMCW zvichibva panesilicon light modulators.

Kuita kweMZM kunoratidzwa sezvizvi: Musiyano wekuita wepamusoro uye wezasi ruoko modulator yakakura. Iyo inotakura sideband rejection rejection yakasiyana neiyo frequency modulation rate, uye mhedzisiro yacho inozonyanya kuipa sezvo frequency inowedzera.

Mumufananidzo unotevera, mhedzisiro yebvunzo yeLidar system inoratidza kuti a/b ndiyo inorova chiratidzo pakukurumidza kumwechete uye pamadaro akasiyana, uye c/d chiratidzo chekurova chiri chinhambwe chakafanana uye nekumhanya kwakasiyana. Mhedzisiro yebvunzo yakasvika 15mm uye 0.775m / s.

Pano, chete kushandiswa kwesiliconOptical modulatoryeFMCW inokurukurwa. Muchokwadi, mhedzisiro yesilicon optical modulator haina kunaka seyeLiNO3 modulator, kunyanya nekuti musilicon optical modulator, shanduko yechikamu/absorption coefficient/junction capacitance haina mutsara nekushanduka kwemagetsi, sezvinoratidzwa pamufananidzo uri pazasi:

Kureva kuti,

Iko kubuda kwesimba rehukama hwemodulatorhurongwa hwakadai
Mhedzisiro ndeyekurongeka kwepamusoro:

Izvi zvinokonzeresa kuwanda kweiyo beat frequency chiratidzo uye kudzikira kweiyo chiratidzo-kune-ruzha reshiyo. Saka ndeipi nzira yekuvandudza mutsara wesilicon light modulator? Pano tinongokurukura maitiro echigadzirwa chacho pachacho, uye usakurukure chirongwa chekubhadhara uchishandisa zvimwe zvivakwa zvekubatsira.
Chimwe chezvikonzero zvekusaita mutsara wechikamu chemodulation nevoltiji ndechekuti nzvimbo yemwenje mune waveguide iri mukugovera kwakasiyana kweanorema uye akareruka paramita uye chiyero chekuchinja chechikamu chakasiyana nekuchinja kwemagetsi. Sezvinoratidzwa pamufananidzo unotevera. Nharaunda yekuderera ine kupindira kwakanyanya inoshanduka zvishoma pane iyo nekukanganisa kwechiedza.

Iyi inotevera nhamba inoratidza shanduko yemacurves yechitatu-order intermodulation kukanganisa TID uye yechipiri-odha harmonic kukanganisa SHD pamwe nekusangana kweiyo clutter, ndiko kuti, iyo modulation frequency. Zvinogona kuonekwa kuti kudzvinyirira kugona kwe detuning kune inorema clutter yakakwirira kupfuura iyo yechiedza clutter. Naizvozvo, kusanganisa kunobatsira kuvandudza mutsara.

Izvo zviri pamusoro zvakaenzana nekufungisisa C muRC muenzaniso weMZM, uye simba reR rinofanirawo kufungwa. Inotevera ndiyo shanduko curve yeCDR3 neyakatevedzana kuramba. Zvinogona kuoneka kuti idiki iyo inoteedzana kuramba, yakakura iyo CDR3.

Chekupedzisira asi chisiri chidiki, mhedzisiro yesilicon modulator haina kunyanya kuipa kupfuura iyo yeLiNbO3. Sezvinoratidzwa mumufananidzo uri pazasi, CDR3 yesilicon modulatorichave yakakwirira kudarika iyo yeLiNbO3 munyaya yekusarura kwakazara kuburikidza nekugadzirwa kwakanaka kwechimiro uye urefu hwemodulator. Mamiriro ekuedzwa anoramba achienderana.

Muchidimbu, dhizaini yesilicon light modulator inogona kungodzikiswa, kwete kuporeswa, uye kana ichinyatso kushandiswa muFMCW system inoda kuongororwa, kana ichigona kudaro, inokwanisa kuwana transceiver kubatanidzwa, ine zvakanakira. yekuderedza mari yakawanda.