A 2048-channel, 125μW/ch DAC Controlling a 9,216-element Optical Phased Array Coherent Solid-State LiDAR
- Resource Type
- Conference
- Authors
- Moss, Benjamin R.; Poulton, Christopher V.; Byrd, Matthew J.; Russo, Peter; Shatrovoy, Oleg; Paquette, David; Reardon, Andrew; Watts, Michael R.
- Source
- 2023 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits) VLSI Technology and Circuits (VLSI Technology and Circuits), 2023 IEEE Symposium on. :1-2 Jun, 2023
- Subject
- Components, Circuits, Devices and Systems
Phased arrays
Integrated optics
Laser radar
Phase shifters
Very large scale integration
Silicon photonics
Voltage control
- Language
- ISSN
- 2158-9682
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 $\lt 3.8 \mu \mathrm{s}$.