Abstract

The properties of a fiber-optic-based grating interferometer with a laser diode as the light source are described. The influence of effects such as wavelength shift, line broadening, and mode hopping on the quality of an interference pattern is investigated both theoretically and experimentally. Introduction of carrier fringes in the interference pattern through the injection-current-induced modulation of a laser diode is shown. The requirements for temporal coherence properties of a light source in grating interferometry are given.

© 1997 Optical Society of America

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