Influence of ambient temperature on the performance of VCSEL based self-mixing sensors: Flow measurements

Ranveer S. Matharu, Julien Perchoux, Aleksandar D. Rakić

Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review

1 Citation (Scopus)


Contactless sensing that makes use of the self-mixing technique offers a compact, low cost solution that can be used for a range of measurement tasks. In this paper we demonstrate a method for maintaining the maximum signal-to-noise ratio (SNR) of the signal obtained from the self-mixing flow sensor based on a Vertical-Cavity Surface-Emitting Laser (VCSEL). It was found that the locus of maximum SNR in the current-temperature space can be well approximated by a simple analytical model related to the temperature behaviour of the VCSEL threshold current. The optimum sensor performance is achieved by tuning the laser current according to the proposed model thus enabling the sensor to operate without temperature stabilisation over a wide temperature range.

Original languageEnglish
Title of host publicationSENSORS 2011
Number of pages4
ISBN (Print)9781424492886
Publication statusPublished - 12 Jan 2012
Externally publishedYes
Event10th IEEE SENSORS Conference - Limerick, Ireland
Duration: 28 Oct 201131 Oct 2011

Publication series

NameProceedings of IEEE Sensors


Conference10th IEEE SENSORS Conference
Abbreviated titleSENSORS 2011

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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