Work

A 35 MHz CMOS Receiver for 3 ns Laser Pulses in Pulsed TOF Laser Ranging

Year: 2025

Type: article

Abstract: The relation between laser transmitter pulse properties and the corresponding optical receiver parameters is discussed, especially from the signal-to-noise ratio and precision points of view. It is shown that the matching of the receiver bandwidth to the laser pulse width maximizes the signal-to-noise ratio without significantly impairing the precision of the measurement. A CMOS receiver with a bandwidth of 35 MHz for the detection of 3 ns (FWHM) laser pulses is presented as a design case. This consists of fully differential pre- and post-amplifiers, biasing circuits and a Gm-RC block to control the output dc levels. The receiver achieves an equivalent total input-referred current noise of 16.5 nArms for 3 ns (FWHM) laser pulses with an 80 μm (diameter) avalanche photo detector (1550 nm). The single shot measurement precision (σ - value) is ~200 ps at an SNR of 20. The receiver is realized in 0.18 μm CMOS technology and consumes 90 mW of power.

Source: IEEE Transactions on Instrumentation and Measurement

DOI: 10.1109/tim.2025.3569943

Authors: Juha Kostamovaara, Sami Kurtti, Tarmo Ruotsalainen

Institution: University of Oulu

Language: English

Topic: Advanced Optical Sensing Technologies

Subfield: Instrumentation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,645

Funder: Academy of Finland