Silicon Kho Kom Zoo Rau FMCW

Silicon Optical Modulatorrau fmcw

Raws li peb txhua tus paub, ib qho tseem ceeb tshaj plaws hauv FMCW-based haular system yog lub siab Linearity Modulator. Nws lub ntsiab cai ua haujlwm tau qhia hauv daim duab hauv qab no: sivDP-IQ ModulatorrawsTib LeegBand Condulation (SSB), lub sab saud thiab qis duaMis nyujUa haujlwm ntawm Null Point, ntawm txoj kev thiab sab hauv ib sab ntawm WC thiab WC, WM yog qhov sib txawv ntawm 90 qib kev sib txawv, thiab thaum kawg lub teeb ntawm WC-WM Yog muab tso tseg, tsuas yog cov zaus hloov chaw ntawm WC + WM. Hauv daim duab B, LR xiav yog lub teeb liab hauv zos FM chirp teeb liab, thiab vim yog cov nyhuv doppler, thiab vim qhov kawg ntaus nrig ua rau F1 thiab F2.

Qhov kev ncua deb thiab nrawm yog:

Hauv qab no yog ib tsab xov xwm luam tawm los ntawm Shanghai Jiaotong University hauv 2021, TxogTus ssbGenerators uas siv FMCW raws liSilicon Lub Teeb Modulators.

Cov kev ua tau zoo ntawm MZM yog qhia raws li hauv qab no: Kev ua tau zoo sib txawv ntawm sab saud thiab sab caj npab modulators yog tus loj. Tus cab kuj tsis tuaj yeem tus nqi sib txawv yog qhov sib txawv ntawm cov zaus ua ntu zus thiab cov nyhuv yuav ua rau muaj ntau dua li cov zaus nce.

Hauv daim duab hauv qab no, cov txiaj ntsig kev sim ntawm Lidar system qhia tau tias A / B yog qhov sib txawv, thiab C / D yog qhov kev sib txawv ntawm tib qho kev ncua deb thiab ntawm kev sib txawv. Qhov kev ntsuas cov qhab nia tau txog 15 hli thiab 0.775m / s.

Ntawm no, tsuas yog daim ntawv thov ntawm siliconKho qhov muagrau FMCW tau sib tham txog. Nyob rau hauv kev muaj tiag, muaj txiaj ntsig ntawm silicon kho kho kho kho kho kho yog tsis zoo li ntawmLino3 Modulator, feem ntau vim hais tias hauv Silicon kho qhov muag hloov pauv / nqus coeffetance tsis yog-voltage pauv, raws li qhia hauv daim duab hauv qab no:

Uas yog,

Cov zis hluav taws xob kev sib raug zoo ntawm lubtus modulatorsystem yog raws li hauv qab no
Qhov tshwm sim yog qhov kev txiav txim siab tsim nyog:

Cov no yuav ua rau qhov dav dav ntawm cov teeb meem yeej zaus zaus thiab txo qis ntawm lub teeb liab-rau-suab nrov piv. Yog li txoj kev los txhim kho cov kab ntawm silicon ntawm silicon lub teeb modulator? Ntawm no peb tsuas yog tham txog cov yam ntxwv ntawm lub cuab yeej nws tus kheej, thiab tsis tham cov phiaj xwm them nqi uas siv lwm cov pab pawg sib txawv.
Ib qho ntawm cov laj thawj rau qhov tsis-linearity ntawm ntu ntawm WaveGuUment thiab theem hloov pauv tau txawv nrog kev hloov pauv ntawm voltage. Raws li qhia hauv cov duab hauv qab no. Denpletion cheeb tsam nrog kev cuam tshuam hnyav hloov tsawg dua li qhov cuam tshuam loj.

Daim duab hauv qab no qhia cov kev hloov pauv ntawm qhov kev txiav txim siab thib peb ntawm kev sib cais clutter thiab qhov thib ob ntawm kev sib cav, qhov ntawd yog, zaus zaus. Nws tuaj yeem pom tau tias kev xa khoom muaj peev xwm ntawm kev ua kom hnyav rau cov neeg swb hnyav siab dua li qhov uas pom kev sib cav. Yog li ntawd, remixing pab txhim kho kab npoo.

Qhov saum toj no yog sib npaug rau kev txiav txim siab c hauv RC qauv ntawm MZM, thiab tus cawv ntawm R yuav tsum tau txiav txim siab. Cov hauv qab no yog qhov hloov pauv hloov ntawm CDR3 nrog cov lus tiv thaiv. Nws tuaj yeem pom tau tias qhov me me tawm tsam, cov loj dua CDR3.

Kawg tab sis tsis tsawg kawg, cov nyhuv ntawm Silicon Modulator tsis tsimnyog phem dua li ntawm Linbo3. Raws li muaj nyob hauv daim duab hauv qab no, CDR3 ntawm covSilicon Modulatoryuav siab dua li ntawm linbo3 nyob rau hauv rooj plaub ntawm tag nrho cov kev tsis ncaj ncees los ntawm kev tsim tsim nyog ntawm cov qauv. Kev ntsuas cov neeg mob nyob twj ywm.

Hauv cov ntsiab lus xaus, cov qauv tsim ntawm cov khoom lag luam silicon tsuas yog siv tau, yog tias nws tuaj yeem ua tiav kev sib koom ua ke, ces nws tuaj yeem ua tiav kev sib koom ua ke, uas muaj qhov zoo rau cov nqi loj-teev txo qis.