Wide-band device for measuring the cross-correlation of signals
US12355489B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 3, 2021 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | Aug 7, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/501
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wideband device for measuring the cross-correlation of a first signal and a second signal, includes a first frequency-shifting optical cavity comprising a first frequency shifter designed to shift the optical frequency of the first signal by a first frequency f1 per round trip in the first cavity, the first cavity having a first trip time τ1; a second frequency-shifting optical cavity comprising a second frequency shifter designed to shift the optical frequency of the second signal by a second frequency f2 per round trip in the second cavity, the second cavity having a second trip time τ2; the first and the second optical cavity being designed such that a maximum number of round trips of the first and the second signal in the first and the second cavity is equal to predetermined N, a detector designed to coherently detect the first signal transmitted by the first cavity and the second signal transmitted by the second cavity and generate a photocurrent (Tr) proportional to a luminous intensity detected by the detector, a low-pass filter designed to filter frequencies of the photocurrent that are lower than min (I), a processor configured to compute a Fourier transform of the photo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.