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. 05, 2016
Filed:
Oct. 30, 2014
Sumitomo Electric Device Innovations, Inc., Yokohama-shi, JP;
Masao Shibata, Yokohama, JP;
Sumitomo Electric Device Innovations, Inc., Yokohama-shi, JP;
Abstract
A method for controlling a wavelength tunable laser is disclosed, wherein a temperature of an optical waveguide is used in the wavelength tunable laser as a driving condition. The method comprises: acquiring a first driving condition from a memory, the wavelength tunable laser being operable to emit light of a first wavelength in the first driving condition; calculating a second driving condition using the first driving condition and a wavelength difference between the first wavelength and a second wavelength different from the first wavelength, the wavelength tunable laser being operable to emit light of the second wavelength in the second driving condition, the second driving condition being calculated under a condition that a temperature of the optical waveguide is always lower than a temperature of the optical waveguide represented by the first driving condition; and driving the wavelength tunable laser based on the second driving condition.