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Proceedings Paper

Self-mixing modulation of semiconductor laser wavelength for detection of motion direction
Author(s): Kuo-Tong Ma; Chin-Kuei Li; I. M. Vincent Chiu; Mason Yen; Wai William Wang; Kelvin Lee
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Paper Abstract

The wavelength of a semiconductor laser diode (LD) is modulated using the self-mixing effect to create the undulation wave. In order to determine the direction of a moving target, the number of undulations is added to the undulations of detected Doppler frequency shift. These modulated undulations are generated through the difference between the rising and falling counts of a triangular modulated current waveform of LD. A theoretical model is proposed to relate the wavelength modulation and current modulation of LD to predict the number of undulations so that the direction of a moving target can be determined.

Paper Details

Date Published: 28 February 2006
PDF: 8 pages
Proc. SPIE 6115, Physics and Simulation of Optoelectronic Devices XIV, 611527 (28 February 2006); doi: 10.1117/12.645716
Show Author Affiliations
Kuo-Tong Ma, BenQ Corp. (Taiwan)
Chin-Kuei Li, BenQ Corp. (Taiwan)
I. M. Vincent Chiu, BenQ Corp. (Taiwan)
Mason Yen, BenQ Corp. (Taiwan)
Wai William Wang, BenQ Corp. (Taiwan)
Kelvin Lee, BenQ Corp. (Taiwan)


Published in SPIE Proceedings Vol. 6115:
Physics and Simulation of Optoelectronic Devices XIV
Marek Osiński; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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