Title :
Frequency-modulated laser beam with highly efficient intensity stabilisation
Author :
du Burck, F. ; Tabet, A. ; Lopez, Oscar
Author_Institution :
Lab. de Phys. des Lasers, Univ. Paris, Villetaneuse, France
Abstract :
The limitation of the amplitude modulation rejection due to the spatial modulation of the output beam of an acousto-optic modulator, which is used in an active laser beam stabilisation system when a frequency modulation of a few megahertz is applied to this modulator, is analysed. It is shown how to overcome this problem, using a single-mode optical fibre at the output of the modulator. A residual amplitude modulation of 10/sup -5/ is achieved.
Keywords :
acousto-optical modulation; amplitude modulation; frequency modulation; laser stability; optical fibres; spatial light modulators; acousto-optic modulator; active laser beam stabilisation system; amplitude modulation rejection; frequency modulation; intensity stabilisation; laser beam; single mode optical fibre; spatial modulation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20057234
