A CMOS Laser Driver with Configurable Optical Power for Time-of-Flight 3D-Sensing

A fast-pulse, configurable output optical power and high-pulse frequency integrated CMOS laser driver for 3D sensing is presented in this paper. The architecture of the proposed laser driver uses a DC-coupled structure, while risetime improvement is achieved by adding a resistor in parallel with the VCSEL. The proposed integrated laser driver is implemented in a
$0.18\mu \text{m}$
CMOS process with a 3.3V power supply. The measurement results show that the laser driver can deliver 0.20-0.92W configurable optical power to free space at a 100MHz pulse repetition rate.