Fiber optic transmission is assuming an increasingly important role in systems for wide-band analog signals and digital signals with high data rates. Although the number of applications for digital networks and telecommunications systems is skyrocketing, analog transmission is still vital to many applications. Analog systems with bandwidths of up to 150MHz are used for wide-band RGB signal distribution, HDTV video signal transmission, and many types of EMIand EMC-disturbed environments. Also important are medical applications, which demand the precision of fiber optic technology for safety reasons.