Fluid flow rate measurement using the change in laser junction voltage due to the self-mixing effect

John R. Tucker, Yah Leng Lim, K. Bertling, Andrei V. Zvyagin, Aleksandar D. Rakić

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

6 Citations (Scopus)

Abstract

We report on the first measurement of the liquid flow rate utilizing the variation in junction voltage across a laser due to the self-mixing effect. A packaged single-mode VCSEL with integrated photodiode is used as the self-mixing sensor. Signal was acquired from both the photodiode and the laser junction voltage. With appropriate signal processing, both detection methods produced comparable results despite voltage signal exhibiting marginally lower signal-to-noise ratio. The voltage detection scheme leads to a more compact and reduced-cost measuring system eliminating the need for the monitoring photodiode and will have significant manufacturing advantages in the future applications based on two-dimensional VCSEL sensor arrays.

Original languageEnglish
Title of host publicationCOMMAD'06 - Proceedings of the 2006 Conference on Optoelectronic and Microelectronic Materials and Devices
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages192-195
Number of pages4
ISBN (Print)1424405785, 9781424405787
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event2006 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD - 2006 - Perth, Australia
Duration: 6 Dec 20068 Dec 2006

Other

Other2006 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD - 2006
CountryAustralia
CityPerth
Period6/12/068/12/06

Keywords

  • Flow
  • Laser junction
  • Optical feedback
  • Self-mixing
  • Voltage sensing

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