Sorianello V, Contestabile G, Midrio M, Pantouvaki M, Asselbergs I, Van Campenhout J, Huyghebaerts C, D'Errico A, Galli P, Romagnoli M
Opt Express. 2017 Aug 7;25(16):19371-19381. doi: 10.1364/OE.25.019371.
We study the frequency chirp properties of graphene-on-silicon electro-absorption modulators (EAMs). By experimentally measuring the chirp of a 100 µm long single layer graphene EAM, we show that the optoelectronic properties of graphene induce a large positive linear chirp on the optical signal generated by the modulator, giving rise to a maximum shift of the instantaneous frequency up to 1.8 GHz. We exploit this peculiar feature for chromatic-dispersion compensation in fiber optic transmission thanks to the pulse temporal lensing effect. In particular, we show dispersion compensation in a 10Gb/s transmission experiment on standard single mode fiber with temporal focusing distance (0-dB optical-signal-to-noise ratio penalty) of 60 km, and also demonstrate 100 km transmission with a bit error rate largely lower than the conventional Reed-Solomon forward error correction threshold of 10.
我们研究了硅基石墨烯电吸收调制器(EAM)的频率啁啾特性。通过实验测量一个100μm长的单层石墨烯EAM的啁啾,我们发现石墨烯的光电特性会在调制器产生的光信号上引起较大的正线性啁啾,导致瞬时频率的最大偏移高达1.8GHz。由于脉冲时间透镜效应,我们利用这一独特特性在光纤传输中进行色散补偿。特别是,我们在标准单模光纤上的10Gb/s传输实验中展示了色散补偿,其时间聚焦距离(0dB光信噪比代价)为60km,并且还演示了在误码率远低于传统里德 - 所罗门前向纠错阈值10的情况下实现100km的传输。