The on-going growing demand for bigger capability in optical communication systems, whereas maintaining signal quality. during this report, increasing the fiber spectral potency and enhancing bit rate of trans-receiver by mistreatment circular polarization at the side of linear polarization and DQPSK modulation techniques has been planned. planned formula is employed during this system for multiplexing linearly polarized and circularly polarized signals. additionally to polarization DQPSK for enhancing bit rate while not moving the spectral dimension of trans-receiver. at the start linear polarization is employed for enhancing the bit rate. currently at the side of circular polarization the bit rate and potency becomes double.