Method for physical random number generation using a vertical cavity surface emitting laser
US11631964B2 · kind B2 · utility
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Key dates
| Filing date | Nov 6, 2017 |
| Grant date | Apr 18, 2023 |
| Priority date | — |
| Expiry date | Sep 11, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/183
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.