The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 2001
Filed:
May. 14, 1999
Applicant:
Inventors:
Paul J. M. Suni, Berthoud, CO (US);
Christian J. Grund, Boulder, CO (US);
Assignee:
Light Works LLC, Berthoud, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 3/08 ; H01S 3/098 ; H01S 3/00 ;
U.S. Cl.
CPC ...
G01C 3/08 ; H01S 3/098 ; H01S 3/00 ;
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.