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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.:

US 6836489 B1

PDFFull Text
Expired
Date of Patent:
Dec. 28, 2004

Filed:

Nov. 06, 2002

Method of and apparatus for controlling wavelength variable semiconductor laser without preparing a high-precision current table

Applicant:
Inventors:

Tetsuya Nishimura, Tokyo, JP;

Mitsunobu Gotoda, Tokyo, JP;

Yoshihito Hirano, Tokyo, JP;

Masao Imaki, Tokyo, JP;

Assignee:

Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;

Attorney:

Leydig, Voit & Mayer, Ltd.

Primary Examiner:

Minsun Oh Harvey

Assistant Examiner:

James Menefee

Int. Cl.
CPC ...
H01S 3/10 ; H01S 3/13 ;
U.S. Cl.
CPC ...
H01S 3/10 ; H01S 3/13 ;
Abstract

An oscillation state of a semiconductor laser is decided. Injection current to the first and second light reflectors of the semiconductor laser are simultaneously swept based on the oscillation state of the semiconductor laser to obtain current conditions of the injection current to the first and second light reflectors that carry out single-mode oscillation in a target wavelength. The semiconductor laser is drive controlled with the obtained current conditions.

Find Patent Forward Citations

Nishimura, Tetsuya. (2004). Method of and apparatus for controlling wavelength variable semiconductor laser without preparing a high-precision current table (U.S. Patent No. 6836489). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6836489

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