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:
Jan. 11, 2005
Filed:
Mar. 12, 2003
Applicants:
Hong Chen, Shrewsbury, MA (US);
Ravi Krishnan Rajan, Wakefield, MA (US);
Peidong Wang, Carlisle, MA (US);
Inventors:
Hong Chen, Shrewsbury, MA (US);
Ravi Krishnan Rajan, Wakefield, MA (US);
Peidong Wang, Carlisle, MA (US);
Assignee:
Nortel Networks, Ltd., St. Laurent, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 313 ;
U.S. Cl.
CPC ...
Abstract
Apparatus for use in tuning a tunable optical device to a target wavelength, the apparatus comprising: a light source for generating light at a wavelength which is a higher order mode of the operational wavelength of the tunable device; and a wavelength detector and control unit for monitoring the wavelength of light emerging from the tunable device and controlling the tuning voltage applied to the tunable device according to the wavelength of the light emerging from the tunable device.