ANALOG INTENSITY MODULATION SCHEMES FOR OPTICAL-FIBER HDTV TRANSMISSION

The major analogue intensity modulation schemes are assessed and compa red in relation to their ability to provide high-quality transmission of high-definition television (HDTV) signals on single-mode optical fi bre. The practical investigation and novel implementations for subcarr ier frequency modulation (SCFM) and square wave frequency modulation ( SWFM) schemes are then described prior to discussion of the relative p erformance attributes of these transmission systems. Both modulation t echniques proved satisfactory for high-quality HDTV transmission over single-mode fibre with the balance of the measured performance and the necessary system requirements not decisively favouring either method.