  Time delay reservoir computing (TDRC) using semiconductor lasers (SLs) has
proven to be a promising photonic analog approach for information processing.
One appealing property is that SLs subject to delayed optical feedback and
external optical injection, allow tuning the response bandwidth by changing the
level of optical injection. Here we use strong optical injection, thereby
expanding the SL's modulation response up to tens of GHz. Performing a
nonlinear time series prediction task, we demonstrate experimentally that for
appropriate operating conditions, our TDRC system can operate with sampling
times as small as 11.72 ps, without sacrificing computational performance.
