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Related Experiment Video

Updated: Jun 24, 2026

Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors

Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors

Published on: June 23, 2018

Self-mixing imaging sensor using a monolithic VCSEL array with parallel readout.

Yah Leng Lim¹, Milan Nikolic, Karl Bertling

¹School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, Australia.

|April 1, 2009

Summary

This summary is machine-generated.

This study introduces a novel self-mixing imaging system using Vertical-Cavity Surface-Emitting Laser (VCSEL) arrays. This technology enables high-resolution sensing with reduced complexity for nanotechnology and life sciences.

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Area of Science:

Optoelectronics
Nanotechnology
Life Sciences

Background:

Two-dimensional arrays of Vertical-Cavity Surface-Emitting Lasers (VCSELs) offer potential for advanced sensing.
Independently addressable lasers enable high-resolution, full-field imaging with electronic scanning.

Purpose of the Study:

To report the first implementation of a self-mixing imaging system with parallel readout using a monolithic VCSEL array.
To demonstrate a simplified self-mixing sensor by acquiring Doppler signals from VCSEL junction voltage variations.

Main Methods:

Development of a monolithic VCSEL array for parallel readout.
Acquisition of self-mixing Doppler signals via VCSEL junction voltage variations.
Validation of the sensor by imaging velocity distribution on a rotating disc.

Main Results:

Successful implementation of a self-mixing imaging system with parallel readout.
Demonstrated reduction in system complexity by using junction voltage instead of power variations.
Validated sensor performance through imaging of a rotating disc's velocity distribution.

Conclusions:

Monolithic VCSEL arrays are powerful tools for advancing self-mixing sensors.
This technology facilitates parallel imaging paradigms.
The system serves as a stepping stone towards full-field self-mixing sensor systems.