System and method for microwave distribution and measurement with high dynamic range
US10341028B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2018 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Jan 29, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2507
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for transmitting and receiving a radio frequency (RF) signal over an optical channel is described, where a nonlinear optical harmonic generation device is used to increase the system performance. The RF signal is phase modulated onto an optical carrier. The received optical carrier propagates through a nonlinear optical harmonic generation device, which increases a phase modulation depth at the harmonic wavelength. This larger modulation depth can be used to achieve larger gain. By photo-detecting both the fundamental and the harmonic optical wavelengths, then properly scaling and subtracting the two photo-detected signals, the enhanced modulation depth at the harmonic optical wavelength can be used to cancel out unwanted nonlinear distortions thereby linearizing the measured RF signal. The method uses a phase-to-amplitude conversion device to change phase modulation into amplitude modulation, and is compatible with phase-to-amplitude devices that perform photonic down-conversion thereby allowing for reduced bandwidth photo-detectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.