Title :
Wide-range directional LDV employing modulated semiconductor laser source
Author :
Schr¿¿der, J.E. ; Nielsen, C.J.
Author_Institution :
Technical University of Denmark, Electromagnetics Institute, Lyngby, Denmark
Abstract :
A laser Doppler velocimeter (LDV) based on a semiconductor laser is described. Information on the direction of flow is obtained by applying a single-sideband technique using direct modulation of the laser diode. A measuring range of 8.4 MHz is reached with this technique, where the nonideal FM properties of the semiconductor laser are dealt with by an equalisation of the modulation current.
Keywords :
laser velocimeters; direct modulation; direction of flow; equalisation; laser Doppler velocimeter; measuring range; modulated semiconductor laser source; nonideal FM properties; single-sideband technique; wide range directional laser velocimeter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860319
