The present research focuses on two dimensional L-shape waveguide for the realisation of optical interconnect at the signal of 1550 nm, which will help for the transformation of signals from one chip to another. In this article, graphene based light emitting diode generates the wavelength of 1550 nm, where PIN photodiode converts the optical signal (wavelength 1550 nm) to its electrical counterpart. The proposed wave guide (11×11 silicon rods) with L shape defect allows the signal from source to detector. The principle of mechanism relies on the propagation of field along with the defect path which is made through finite difference time domain method. Moreover, there is no loss associated with the structure during the transformation of signals. The computational result infers that the efficiency of LED is about 99.98 % where the efficiency of photodiode is 99.94 %. Finally, the suggested silicon based waveguide acts as a good candidate for the realisation of an efficient optical interconnect.