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Proceedings Paper

Waveform distortion and Doppler frequency broadening of self-mixing signal in polymer fiber optic VCSEL system
Author(s): Huaqiao Gui; Wei Huang; Jing Xu; Liang Lv; Jianping Xie
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Paper Abstract

The influences of polymer optical fiber (POF) on self-mixing signals in laser Doppler velocimetry are investigated in detail. The waveform distortion and Doppler frequency broadening of self-mixing signal have been observed for the first time. It indicates theoretically and experimentally that the large acceptance angle of POF facet is the major reason for this phenomenon. The other characteristics of POF, such as bend radius over 7.5mm and thermal effect at room temperature, don't cause significant signal distortion. Lastly, we demonstrated a compact fiber-optic self-mixing laser Doppler vibrometer with high accuracy of half optical wavelength and long working distance between fiber facet and diffusing target adopting a single-longitudinal mode vertical-cavity surface-emitting laser (VCSEL).

Paper Details

Date Published: 8 January 2008
PDF: 9 pages
Proc. SPIE 6838, Optoelectronic Devices and Integration II, 683829 (8 January 2008); doi: 10.1117/12.760180
Show Author Affiliations
Huaqiao Gui, Univ. of Science and Technology of China (China)
Wei Huang, Univ. of Science and Technology of China (China)
Jing Xu, Univ. of Science and Technology of China (China)
Liang Lv, Univ. of Science and Technology of China (China)
Jianping Xie, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 6838:
Optoelectronic Devices and Integration II
Xuping Zhang; Hai Ming; Maggie Yihong Chen, Editor(s)

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