GaN laser self-mixing velocimeter for measuring slow flows

被引:34
作者
Kliese, Russell [1 ]
Lim, Yah Leng [1 ]
Bosch, Thierry [2 ]
Rakic, Aleksandar D. [1 ]
机构
[1] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld 4072, Australia
[2] Univ Toulouse, INPT, LOSE, Toulouse, France
基金
澳大利亚研究理事会;
关键词
D O I
10.1364/OL.35.000814
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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 mu m/s. (c) 2010 Optical Society of America
引用
收藏
页码:814 / 816
页数:3
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