Temperature and current dependence of Doppler SNR in a VCSEL based self-mixing sensor

Ranveer S. Matharu, Yah Leng Lim, Russell Kliese, Karl Bertling, Ahmad Ashrif A Bakar, Julien Perchoux, A. D. Rakic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a method for maintaining the maximum signal-to-noise ratio (SNR) of the signal obtained from the self-mixing sensor based on a Vertical-Cavity Surface-Emitting Laser (VCSEL). The SNR of the Doppler self-mixing signal was investigated experimentally as a function of laser driving current and ambient temperature. It was found that the locus of the maximum SNR in the current-temperature space can be well approximated by the simple analytical model based on the temperature behaviour of the VCSELs threshold current. A selfmixing Doppler signal was acquired from the variation in VCSEL junction voltage rather than from a conventional variation in laser optical power to reduce the complexity of the system. It was found that the optimum sensor performance over a wide range of ambient temperatures can be achieved by tuning the laser current according to the proposed model. This enables the sensor to operate without temperature stabilisation making it attractive for mobile applications and applications with limited power supply.

Original languageEnglish
Title of host publicationProceedings of IEEE Sensors
Pages425-428
Number of pages4
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventIEEE Sensors 2009 Conference - SENSORS 2009 - Christchurch
Duration: 25 Oct 200928 Oct 2009

Other

OtherIEEE Sensors 2009 Conference - SENSORS 2009
CityChristchurch
Period25/10/0928/10/09

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Surface emitting lasers
Signal to noise ratio
Sensors
Lasers
Temperature
Analytical models
Stabilization
Tuning
Electric potential

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Matharu, R. S., Lim, Y. L., Kliese, R., Bertling, K., A Bakar, A. A., Perchoux, J., & Rakic, A. D. (2009). Temperature and current dependence of Doppler SNR in a VCSEL based self-mixing sensor. In Proceedings of IEEE Sensors (pp. 425-428). [5398259] https://doi.org/10.1109/ICSENS.2009.5398259

Temperature and current dependence of Doppler SNR in a VCSEL based self-mixing sensor. / Matharu, Ranveer S.; Lim, Yah Leng; Kliese, Russell; Bertling, Karl; A Bakar, Ahmad Ashrif; Perchoux, Julien; Rakic, A. D.

Proceedings of IEEE Sensors. 2009. p. 425-428 5398259.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Matharu, RS, Lim, YL, Kliese, R, Bertling, K, A Bakar, AA, Perchoux, J & Rakic, AD 2009, Temperature and current dependence of Doppler SNR in a VCSEL based self-mixing sensor. in Proceedings of IEEE Sensors., 5398259, pp. 425-428, IEEE Sensors 2009 Conference - SENSORS 2009, Christchurch, 25/10/09. https://doi.org/10.1109/ICSENS.2009.5398259
Matharu RS, Lim YL, Kliese R, Bertling K, A Bakar AA, Perchoux J et al. Temperature and current dependence of Doppler SNR in a VCSEL based self-mixing sensor. In Proceedings of IEEE Sensors. 2009. p. 425-428. 5398259 https://doi.org/10.1109/ICSENS.2009.5398259
Matharu, Ranveer S. ; Lim, Yah Leng ; Kliese, Russell ; Bertling, Karl ; A Bakar, Ahmad Ashrif ; Perchoux, Julien ; Rakic, A. D. / Temperature and current dependence of Doppler SNR in a VCSEL based self-mixing sensor. Proceedings of IEEE Sensors. 2009. pp. 425-428
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