Institucio Catalana De Recerca I Estudis Avancats

Fundacio Institut De Ciencies Fotoniques

Institució Catalana De Recerca I Estudis Avançais

Fundado Institut De Ciències Fotóniques &

Fundació Insititut De Ciències Fotòniques

Morgan Wilfred Mitchell

Valerio Pruneri

Waldimar Amaya

Carlos Abellán

Joanna A Zielinska

Carlos Abelian Sanchez

Carlos ABELLÁN

A method for physical random number generation includes the steps of: modulating the gain of a vertical-cavity surface-emitting laser periodically from the lower threshold to the upper threshold and back; maintaining the gain per round trip positive for a longer period than the round trip time of the cavity; maintaining the net gain per round trip negative for a longer period than the round trip time of the cavity, in order to create optical pulses of random amplitude; detecting the optical pulses; converting the optical pulses into electrical analog pulses; and digitising the electrical analog pulses into random numbers.

Method for physical random number generation using a vertical cavity surface emitting laser

Tunable monolithic cavity-based frequency converter pumped by a single-frequency laser where cavity resonance(s) are achieved by independently changing the temperatures of different sections of the crystal, including the periodically poled section and one or more adjacent, non-poled regions. Having independent control of the phase matching temperature and the cavity resonance for a down-converted beam increases the efficiency.

Monolithic frequency converter

A process and system for producing random numbers by means of a quantum random number generator is disclosed, comprising the steps of operating a multimode laser in a laser cavity with periodic modulation of a net gain, and detecting the random intensity pattern produced by the inter-mode beating occurring within the laser cavity. The numbers produced are truly random and a minimal number of elements is required for operating the system.

Process for quantum random number generation in a multimode laser cavity

Growing community of inventors

Barcelona, Spain

Morgan Wilfred Mitchell