Externally modulated optical analog links for microwave applications

Summary form only given, as follows. Fiber-optic analog links using external modulators are useful for microwave applications. They can transmit microwave signals over distances up to several kilometers with low loss and negligible dispersion. With the addition of a few more components, these links can be used in phased array antennas to steer the beam and to provide broadband adaptive nulling. The author has demonstrated point-to-point links at frequencies up to 22 GHz. An overview is given of the important factors in link design, with emphasis on the electro-optic modulator which is a key component in these systems. Current research trends and status of commercially available devices are also be reviewed