This paper employs dual-output Mach–Zehnder Modulator (MZM) for optical access networks without optical filters. Light waves generated from multiple laser sources are multiplexed and fed into dual-output MZM. Biasing the dual-output MZM at null point generates central carriers in one output port and first-order sidebands in another output port. Reflective semiconductor optical amplifier modulates both the central carriers and sidebands with wired and wireless data, respectively. The modulated optical signals are combined by polarization beam splitter and transmitted through 25-km single-mode fiber. The performance of the proposed scheme is proved by clear eye-diagrams and great bit error rate (BER) curves. Moreover, the power penalty at the BER of 10^-9 is less than 1 dB for both wired and wireless signals. Therefore, the proposed system simultaneously transmits wired and wireless signals.

本文将双输出马赫曾德尔调制器（MZM）用于没有光学滤波器的光接入网络。从多个激光源产生的光波被多路复用并馈入双输出MZM。在零点处偏置双路输出MZM会在一个输出端口中产生中心载波，而在另一个输出端口中产生一阶边带。反射型半导体光放大器分别利用有线和无线数据调制中央载波和边带。调制的光信号由偏振分束器合并，并通过25公里的单模光纤传输。清晰的眼图和大的误码率（BER）曲线证明了该方案的性能。此外，BER为10 ^-9时的功率损失对于有线和无线信号，均小于1 dB。因此，提出的系统同时传输有线和无线信号。