High stability optoelectronic oscillator and method
US11652445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2020 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | Aug 13, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0044
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An optoelectronic oscillator (OEO) including a drift compensation circuit is provided. The OEO includes a set of optical domain components communicatively coupled with a set of RF domain components. The RF domain components include a mode selection filter, a phase locked loop (PLL) and a drift compensation circuit communicatively coupled between the mode selection filter and the PLL. The mode selection filter provides a mode selection result to the drift compensation circuit. The drift compensation circuit phase modulates the mode selection result in a vector based coordinate system to maintain a drift compensated mode selection result within a locking bandwidth of the PLL, and to minimize phase shifting from accumulating phase drift. The PLL detects a phase difference between the drift compensated mode selection result and a reference signal, for use in maintaining the PLL in a phase lock with the reference signal, in particular over wide operational temperature ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.