Experimental study of the randomness of the dynamics of a laser diode under stimulated Brillouin scattering optical feedback

Chaotic dynamics in laser diodes subject to optical feedback has widely been studied for decades. The periodicity imposed by the external cavity frequency (the so-called "time delay signature") is challenging to eliminate and it is a drawback for some applications, such as all-optical random signal generation, that require random signals. This has motivated the search for alternative ways of generating optical chaos with diode lasers.