Self-mixing sensor apparatus and method
US6233045A · kind A · utility
92Cited by
10References
60Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1999 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | May 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self-mixing sensor usable for remotely measuring speed, vibrations, range, and length is provided in a manner making the device practical for economic implementation while retaining accuracy. In one embodiment, the device is configured to avoid mode hopping, such as by providing for relatively high loss for all modes other than the desired mode. Preferably this is accomplished by utilizing laser types that have a high degree of side mode supression, such as DFB lasers or through active or passive control of the amount of light permitted to reenter the laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.