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:
Aug. 24, 2004
Filed:
Jul. 25, 2001
Bardia Pezeshki, Redwood City, CA (US);
Edward C. Vail, Menlo Park, CA (US);
JDS Uniphase Corporation, San Jose, CA (US);
Abstract
A tunable laser module includes a laser operating at a first wavelength. A wavelength locker includes a planar silica waveguide that is coupled to the laser. The wavelength locker provides an error signal that is used to tune the first wavelength of the laser to a desired wavelength. The wavelength locker and one or more detector(s) generate the error signal based on a difference between the first wavelength value and the desired wavelength value. A controller is connected to the waveguide wavelength locker and the laser. The controller generates a laser control signal based on the error signal that adjusts the first wavelength. The waveguide wavelength locker can alternately include first and second spaced gratings, Mach-Zehnder interferometers with different asymmetries, passive waveguide(s), and combinations thereof. The laser is mounted on a first temperature controlled package and the waveguide wavelength locker is mounted on the first temperature controlled package.