A Sub-ns Integrated CMOS Laser Driver With Configurable Laser Pulses for Time-of-Flight Applications

An integrated pulsed laser driver in a 0.18-μm CMOS technology has been developed for generating configurable and stable laser diode pulses for time-of-flight applications. The duration of the output optical laser pulses can be configured from below 100 ps up to 5 ns, with 1-ps typical resolution, b...

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Bibliographic Details
Published in:IEEE sensors journal 2018-08, Vol.18 (16), p.6547-6556
Main Authors: Blasco, Guillermo, Dorich, Dominik, Reh, Hartmut, Burkard, Ralf, Isern, Eugeni, Martin, Elena
Format: Article
Language:English
Subjects:
CMOS
CMOS laser driver
Delays
Electric potential
Generators
Inverters
Laser applications
Lasers
Measurement by laser beam
Phase locked loops
PVT compensation
Semiconductor lasers
Stability
time-of-flight
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Summary:An integrated pulsed laser driver in a 0.18-μm CMOS technology has been developed for generating configurable and stable laser diode pulses for time-of-flight applications. The duration of the output optical laser pulses can be configured from below 100 ps up to 5 ns, with 1-ps typical resolution, by a combination of a coarse and a fine delay generator. The pulse-width stability has been designed against process, supply voltage and temperature variations. This has been carried out using a system with two phase-locked loops that regulate the supply voltage of the chain of inverters, found in the driver and pre-driver improving by 2.5 times the stability compared to the case, where a fixed supply voltage is applied. Laser current can be configured up to 500 mA and output pulses are generated at a repetition rate up to 200 MHz.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2018.2850742