Journal
OPTICS COMMUNICATIONS
Volume 389, Issue -, Pages 270-274Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2016.12.046
Keywords
Multiple Self-mixing Interferometry; Triangular wave modulation; Distance measurement
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Funding
- Natural Science Foundation of Heilongjiang Province, China [E201332]
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To improve the precision of distance measurement using laser Self-Mixing Interferometry (SMI) and compute short distance, we propose a method of Multiple Self-Mixing Interferometry (MSMI) that is modulated with a triangular wave. The principle of this method has been described in this paper. Experiments at different distances and amplitudes of modulation current are based on the proposed method. Low-priced and easily operated experimental devices are built. Experimental results show that a resolution of 2.7 mm can be achieved for absolute distance ranging from 2.2 to 23 cm.
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