Non-linear optoacoustic narrowband communications technique
US7613074B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2006 |
| Grant date | Nov 3, 2009 |
| Priority date | — |
| Expiry date | Nov 18, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B11/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention includes a system and method of use for communications from an in-air platform to a submerged platform. The system includes a laser positionable on the in-air platform above a water medium that sends a pulsed information-bearing laser beam containing a modulated communications signal to create and react in a non-linear regime manner with the water medium at an air/water interface. The beam vaporizes and optically breaks down a portion of the water medium, creates a shock wave and generates bubble oscillations at the vaporized portion. An acoustic sensor on the submerged platform detects these shock wave oscillations within the water medium and a demodulator-decoder that identifies these broadband acoustic transients that contain deterministically placed energy and demodulates-decodes the acoustic transients into the transmitted communications signals from the in-air platform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.