OPTICAL AMPLITUDE MODULATING SYSTEM CAPABLE OF REMOVING HIGH-ORDER COMPONENT

摘要

It is an object of the present invention to provide a DSB-SC system capable of suppressing a third order component. The DSB-SC modulation having high extinction ratio can be realized by adjusting the first order component, which is generated by applying a modulation signal (3f m ), and the third order component, which is generated by applying a basic signal (f m ), to have reversed phase and the same intensity level, and then by applying the first order component to the third order component, these two components cancel each other.