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:
Nov. 14, 2017
Filed:
Aug. 29, 2014
Sumitomo Electric Device Innovations, Inc., Yokohama, JP;
Sumitomo Electric Device Innovations, Inc., Yokohama-shi, JP;
Abstract
A driving condition for causing the tunable wavelength laser to conduct laser oscillation at a first wavelength is acquired. a driving condition for causing the tunable wavelength laser to conduct laser oscillation at the second wavelength is calculated. The tunable wavelength laser is driven based on the driving condition of the second wavelength, feedback control that changes the driving condition of the tunable wavelength laser based on a difference between an output of the wavelength sensing unit and the target value is performed, and the tunable wavelength laser is caused to oscillate at the second wavelength. The driving condition of the tunable wavelength laser obtained by the feedback control when oscillation has occurred at the second wavelength is stored in the memory. Thereafter, the tunable wavelength laser is driven with reference to the stored driving condition of the tunable wavelength laser.