Integrated microlaser Doppler velocimeter

Takahiro Ito, Renshi Sawada, Eiji Higurashi

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We have developed a microlaser Doppler velocimeter in which the laser diode, photodiode, and optical waveguide are monolithically integrated on a GaAs substrate. This integration eliminates the difficult optical alignment and susceptibility to environmental disturbances which are disadvantages of the conventional laser Doppler velocimeter. Our velocimeter showed good linearity between relative velocity and output frequency, and it can detect very low velocities of less than 5 μm/s. It can also measure the flow speed of a liquid containing particles. Moreover, the addition of a step at the end of the waveguide and one more photodiode enables the phase difference to be used for directional discrimination.

Original languageEnglish
Pages (from-to)30-33
Number of pages4
JournalJournal of Lightwave Technology
Volume17
Issue number1
DOIs
Publication statusPublished - Dec 1 1999

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Velocimeters
Photodiodes
waveguides
Laser Doppler velocimeters
photodiodes
Optical waveguides
laser doppler velocimeters
Semiconductor lasers
Waveguides
optical waveguides
low speed
linearity
discrimination
Liquids
disturbances
Substrates
semiconductor lasers
alignment
magnetic permeability
output

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Integrated microlaser Doppler velocimeter. / Ito, Takahiro; Sawada, Renshi; Higurashi, Eiji.

In: Journal of Lightwave Technology, Vol. 17, No. 1, 01.12.1999, p. 30-33.

Research output: Contribution to journalArticle

Ito, T, Sawada, R & Higurashi, E 1999, 'Integrated microlaser Doppler velocimeter', Journal of Lightwave Technology, vol. 17, no. 1, pp. 30-33. https://doi.org/10.1109/50.737418
Ito, Takahiro ; Sawada, Renshi ; Higurashi, Eiji. / Integrated microlaser Doppler velocimeter. In: Journal of Lightwave Technology. 1999 ; Vol. 17, No. 1. pp. 30-33.
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