Laser-based device utilizing multiple laser beams
US9756431B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2016 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | Jan 29, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R23/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A laser-based device or sensor includes: a first laser transmitter having a first self-mix carrier frequency; a second laser transmitter having a second, different, self-mix carrier frequency; a first monitor photodiode to receive a first optical signal from the first laser transmitter, and to output a first electric signal; a second monitor photodiode to receive a first optical signal from the second laser transmitter, and to output a second electric signal; an electric connection to connect together the first electric signal and the second electric signal, forming a combined electric signal; a single laser receiver to receive the combined electric signal and to generate from it a spectrum that corresponds to both (i) optical feedback of the first laser transmitter, and (ii) optical feedback of the second laser transmitter. Alternatively, a single monitor photodiode is used, receiving optical signals from multiple laser transmitters, and outputting a single electric signal to a single laser receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.