We evaluate the convergence of 4 G and 6 G in an optical access network for a fibre link of 25 Km. The signals were transmitted alone LTE at 1.5 GHz and OFDM-IM in baseband. An optimum power of -21 dBm was found for LTE. Then the distance between LTE and OFDM-IM was optimized, achieving a minimum distance of 129 MHz, beside the optimum power of -20 dBm for LTE was achieved when were transmitted together and a 4 dBm improvement in the power receiver for LTE was found.