Vertical-cavity Surface-emitting Lasers

LiDAR yog ib qho tseem ceeb ntawm ADAS (Advanced Driving Assisting System), AVs (Autonomous Vehicles), thiab kev lag luam automation systems. Kev ua tau zoo VCSELs (nqaj-kab noj hniav nto-emitting lasers), nrog rau lawv cov hneev taw me me, tus nqi txaus nyiam, thiab kev ntseeg tau zoo thiab kev ua tau zoo, yuav tsis muaj kev poob siab muaj txiaj ntsig zoo rau LiDAR kev lag luam. 100 feem pua ​​​​cov khoom siv hauv xeev LiDAR qhia tau hais tias muaj peev xwm zoo li qhov kev hloov pauv tom ntej hauv LiDAR thev naus laus zis, txhawm rau hloov cov tsoos loj thiab kim tshuab spinning thiab microelectromechanical systems (MEMs) LiDAR systems. Brandnew tau cog lus los muab LiDAR kev lag luam nrog cov kev daws teeb meem zoo, txhim khu kev qha, thiab pheej yig VCSEL.

Sib koom 100 feem pua ​​​​ntawm cov khoom siv hauv xeev LiDAR kev faib tawm, Flash LiDAR thiab Optical Phase Array (OPA) LiDAR cov tshuab tsis muaj qhov txav txav, txo qis cov nyhuv vibration. Tag nrho cov khoom tuaj yeem muab tso rau hauv ib lub rooj tsavxwm kom txo qhov loj me, nce kev ua tau zoo, thiab txhim kho ruggedness.

Lub hauv paus ntsiab lus ntawm solid-state Flash LiDAR yog los teeb lub FOV nrog ib lub teeb nyem los ntawm qhov dav-angle laser qhov chaw, tom qab ntawd ntes lub teeb rov qab tawg los ntawm ib qho ntawm cov duab thaij duab, zoo ib yam li lub koob yees duab ntes ib qho duab ib snap ntawm lub shutter. . OPA LiDAR siv 2D array ntawm laser emitters thiab nws tus kheej tswj cov theem hloov pauv los tsim cov qauv nyob deb ntawm qhov chaw thiab hloov lub nqaj txoj kev taw qhia. Lub tswv yim no los ntawm theem-array ntawm cov kav hlau txais xov hauv RADAR thev naus laus zis, tsuas yog hauv nanoscale.

Qhov ntau, qhov rov ua dua, thiab kev daws teeb meem yog qhov tseem ceeb ntawm LiDAR. Qhov ntau yog hais txog qhov deb npaum li cas LiDAR system tuaj yeem "pom" thiab tseem muaj cov ntaub ntawv txaus kom paub qhov txawv ntawm ib qho khoom. Qhov 'repetition rate' yog ntau npaum li cas LiDAR system pulses, ntes cov duab nrog txhua tus mem tes. Ib qho kev daws teeb meem siab dua tso cai rau kev siv cov ntaub ntawv ntau ntxiv hauv ib qho FOV muab. Cov lus hauv qab no qhia txog kev sib piv ntawm ntau yam, rov ua dua tus nqi, kev daws teeb meem, thiab software / hardware complexity ntawm LiDAR txoj kev sib txawv.

High-power VCSEL diodes, nrog luv mem tes dav dav thiab me me beam divergence, yog qhov zoo tshaj plaws kev xaiv rau solid-state LiDAR! VCSELs yooj yim ua ke nrog koj lub cev, muab cov kev xaiv pob, suav nrog SMD 2016 thiab TO46 TO-tau. Multi-channel VCSEL arrays suav nrog ntau qhov tuag rau hauv ib pob, 1x4, 1x8, 1x16 arrays, thaum tus kheej tswj txhua tus tuag kom ua tau raws li cov ntawv thov tshwj xeeb.

VCSELs muaj nyob rau ntawm 850nm thiab 940nm wavelengths, nrog rau 850nm wavelength muab kev nkag tau zoo hauv cov av noo ib puag ncig. Silicon CMOS photodetectors pab kom pom cov wavelengths nrog siab rhiab heev. Pulsed optical powers los ntawm 10W txog 1000W muaj rau luv luv rau nruab nrab-ntau hom phiaj. VCSELs, muab cov kab teeb me me, tso cai rau kev txhim kho LiDAR daws teeb meem.

Qhov zoo ntxiv ntawm VCSELs:

Yooj yim rau kev koom ua ke nrog cov khoom siv photonic thiab hluav taws xob ntawm ib lub rooj tsavxwm.

Yooj yim rau pawg ntau VCSEL tuag, muab cov khoom siv hluav taws xob muaj zog.

Xaiv kho lub hwj chim rau txhua VCSEL tuag los luam theej qhov chaw tseem ceeb.

Tsawg wavelength drift nrog kub siab, ua rau muaj txiaj ntsig zoo ntawm cov teeb liab.

Tsawg rhiab heev rau lub teeb liab emitter tsis ua hauj lwm.

Kev ntseeg siab dua.

Qhov kawg, tab sis tsis tsawg kawg, ntau qhov sib txuas VCSELs rau LiDAR tuaj yeem ua tiav lub zog siab dua nrog thaj tsam me me, uas txo qhov nyuaj ntawm qhov kho qhov muag.

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