Fiber-optic transmission of SMPTE 259M and SMPTE 292M SDI signals

This paper; in the form of a review, introduces some technical aspects deal ing with fiber-optic digital transmitters. The special case of the serial d igital interface (SDI) data transmitter is considered. The paper presents t he basic features of semiconductor laser structures; the problem of laser l ight modulation and stabilization is discussed, especially for direct modul ation; and SDI signal features are briefly reviewed. The most commonly used mean-value stabilization loop is analyzed and its limited performance for SDI signal transmission is demonstrated. Finally, the SDI designated feed-f orward compensated stabilization loop is proposed and its properties are an alyzed.