A 2048-channel, 125μW/ch DAC Controlling a 9, 216-element Optical Phased Array Coherent Solid-State LiDAR.
VLSI Technology and Circuits(2023)
Abstract
A CMOS driver chip for controlling an optical phased array realizing $\mathrm{a}\gt50$ meter coherent LiDAR engine has been demonstrated. Five identical 2048-channel driver chips flip onto a single silicon photonics LiDAR engine IC containing the 9,216-element optical phased array. Each voltage-mode driver cell controls an individual electro-optic phase shifter in the array and adjusts the phase shift from 0 to $2 \pi$ over 8 bits. Each driver cell has an average power of $125 \mu \mathrm{W}$ with a resolve time of $\lt400$ ns and the driver chip is capable of a system pointto-point steering time $\lt 3.8 \mu \mathrm{s}$.
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Key words
2048-channel driver chips,216-element optical phased array,9 element optical phased array,a\gt50 meter coherent LiDAR engine,adjusts,CMOS driver chip,individual electro-optic phase,phase shift,power 125.0 muW,single silicon photonics LiDAR engine IC,time 3.8 mus,voltage-mode driver cell,word length 8.0 bit
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