In this paper, we present a novel time domain diversity transmitter (TDDT) for the Spectrally Efficient Asymmetrically and Symmetrically Clipped Optical (SEASCO) OFDM System. SEASCO-OFDM was developed to reduce the complex architecture of two frame ASCO-OFDM. It uses a single frame to combine the individually clipped data on odd and even subcarriers to yield a real non-negative signal. In addition, TDDT, which is used as transmitter, implements noise clipping. As a result, better symbol error rate (SER) can be witnessed. For 1024-QAM at SER of 10-3, the system experiences 1.35 dB better SNR.