Reducing impact of cross-talk between modulators that drive a multi-channel AOM
US11187962B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 2018 |
| Grant date | Nov 30, 2021 |
| Priority date | — |
| Expiry date | Jan 15, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/704
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosed technology teaches a method of reducing the impact of cross-talk between transducers that drive an acousto-optic modulator. The method includes operating the transducers, which are mechanically coupled to an acousto-optic modulator medium, with different frequencies applied to adjoining transducers and producing a time-varying phase relationship between carriers on spatially adjoining modulation channels emanating from the adjoining transducers, with a frequency separation between carriers on the adjoining channels of 400 KHz to 20 MHz. The disclosed technology also includes operating 5 to 32 modulators, which are mechanically coupled to the acousto-optic modulator crystal, and varying the different frequencies applied to the modulators in a sawtooth pattern, varying the different frequencies over a range and then repeating variation over the range. Also included is varying the frequencies applied to the modulators in a rising or falling pattern applied progressively to the spatially adjoining transducers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.