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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 6 — Mar. 15, 2010
  • pp: 814–816

GaN laser self-mixing velocimeter for measuring slow flows

Russell Kliese, Yah Leng Lim, Thierry Bosch, and Aleksandar D. Rakić  »View Author Affiliations

Optics Letters, Vol. 35, Issue 6, pp. 814-816 (2010)

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The self-mixing (SM) laser sensing technique allows for a simple, self-aligned, and robust system for measuring velocity. Low-cost blue emitting GaN laser diodes have recently become available owing to the high volume requirements for Blu-ray Disc devices such as high-definition video players and gaming consoles. These GaN lasers have a significantly shorter wavelength (around 405 nm ) compared with other semiconductor lasers (generally around 800 nm for SM sensors). Therefore, if used in SM flow sensors, they allow measuring of flow rates that would otherwise be too slow to measure. In this Letter we report what we believe to be the world’s first SM flow measurement system based on a blue emitting semiconductor laser, demonstrating the ability to measure flow rates down to 26 μ m s .

© 2010 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(140.2020) Lasers and laser optics : Diode lasers
(140.7300) Lasers and laser optics : Visible lasers

ToC Category:
Lasers and Laser Optics

Original Manuscript: December 9, 2009
Revised Manuscript: January 27, 2010
Manuscript Accepted: February 1, 2010
Published: March 5, 2010

Russell Kliese, Yah Leng Lim, Thierry Bosch, and Aleksandar D. Rakić, "GaN laser self-mixing velocimeter for measuring slow flows," Opt. Lett. 35, 814-816 (2010)

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