Reservoir computing device using external-feedback laser system

A method performed by a Reservoir Computing system, the method comprising:

• emitting, by a laser, light;
• reflecting, by a mirror, external feedback light back to the laser;
• modulating, by a modulator, the external feedback light reflected back to the laser;
• converting, by a photo-detector, a laser output signal to an electrical signal;
• sampling, by an analog-to-digital converter, the electrical signal;
• and
• applying, by a controller, a learning algorithm to the sampled electrical signal.

A Reservoir Computing system, comprising:

• a laser for emitting light;
• a mirror for reflecting external feedback light back to the laser;
• a modulator for modulating the external feedback light reflected back to the laser by modulating a refractive index of the mirror based on electric current variation and a non-linear optical effect;
• a photo-detector for converting a laser output signal to an electrical signal;
• an analog-to-digital converter for sampling the electrical signal;
• and
• a controller for applying a learning algorithm to the sampled electrical signal.

A Reservoir Computing system, comprising:

• a laser for emitting light;
• a mirror for reflecting external feedback light back to the laser;
• an optical switch for selectively enabling one of multiple available optical paths, each having a different effective optical path length for the emitted light, to modulate the external feedback light reflected back to the laser;
• a photo-detector for converting a laser output signal to an electrical signal;
• an analog-to-digital converter for sampling the electrical signal;
• and
• a controller for applying a learning algorithm to the sampled electrical signal.