High Speed Direct Modulation of a Heterogeneously Integrated InP/SOI DFB Laser
An integrated laser source to a silicon photonics circuit is an important requirement for optical interconnects. We present direct modulation of a heterogeneously integrated distributed feedback laser on and coupled to a silicon waveguide. We demonstrate a 28 Gb/s pseudo random bit sequence non return to zero data transmission over 2 km non zero dispersion shifted fiber with a 1 dB power penalty. Additionally, we show 40 Gb/s duobinary modulation generated using the bandwidth limitation of the laser for both back to back and fiber transmission configurations. Furthermore, we investigate the device performance for the pulse amplitude modulation (PAM 4) at 20 GBd for high speed short reach applications.
Journal of Lightwave Technology