Compact and versatile self-mixing type semiconductor laser Doppler velocimeters with direction-discrimination circuit

Author

Shinohara, Shigenobu ; Naito, Hideaki ; Yoshida, Hirofumi ; Ikeda, Hiroaki ; Sum, Masao

Author_Institution

Dept. of Electr. Eng., Shizuoka Univ., Hamamatsu, Japan

Volume

38

Issue

2

fYear

1989

fDate

4/1/1989 12:00:00 AM

Firstpage

574

Lastpage

577

Abstract

A compact vector-velocimeter is described which uses a self-mixing type laser Doppler velocimeter (SM-LDV). It electrically identifies features of the sawtooth-like Doppler beat signal waveform to determine the direction of target motion within a velocity range of 23 mm/s-23 m/s. The range of velocity measured is 0.2 mm/s-34 m/s. The measured vector velocity of a reciprocally moving target as well as a rotating target agrees well with the theoretical value

Keywords

Doppler effect; laser beam applications; laser velocimeters; semiconductor junction lasers; waveform analysis; direction-discrimination circuit; reciprocally moving target; rotating target; sawtooth-like Doppler beat signal waveform; self-mixing; semiconductor laser Doppler velocimeters; target motion; vector-velocimeter; Assembly; Circuits; Frequency; Laser beams; Laser theory; Optical mixing; Optical scattering; Semiconductor lasers; Signal processing; Velocity measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.192350

Filename

192350