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Two-dimensional velocity measurements With self-mixing technique in diode-pumped Yb:Er glass laser

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4 Author(s)
L. Kervevan ; Centre Interdisciplinaire de Recherche Ions Lasers, Caen, France ; H. Gilles ; S. Girard ; M. Laroche

Self-mixing laser Doppler velocimeter based on a two beam geometry scheme is investigated using a single-frequency Yb:Er-doped phosphate glass laser. The geometry allows the observation of a beat mode with optical crosstalk between the two optical paths, giving two major improvements: 1) a precise positioning of the optical head compared to the scattering target; 2) the measurement of both the absolute value of the velocity and the orientation of the speed.

Published in:

IEEE Photonics Technology Letters  (Volume:16 ,  Issue: 7 )