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. 16, 2007
Filed:
Mar. 15, 2001
Kimio Tatsuno, Tokyo, JP;
Tatemi Ido, Kodaira, JP;
Yasunori Iwafuji, Yokohama, JP;
Hideyuki Kuwano, Yokohama, JP;
Naohiko Baba, Fujisawa, JP;
Kimio Tatsuno, Tokyo, JP;
Tatemi Ido, Kodaira, JP;
Yasunori Iwafuji, Yokohama, JP;
Hideyuki Kuwano, Yokohama, JP;
Naohiko Baba, Fujisawa, JP;
Opnext Japan, Inc., Yokohama, JP;
Abstract
An object of disclosed technology is to control lasing wavelengths so that a wavelength shift does not occurs. Another object is to permit wavelengths of a light source for wavelength division multiplexing optical-fiber communication system to be variable in response to an ITU-TS grid. A means for achieving the objects is as follows: locating an etalon in a light path of diode laser light, which is a parallel plane wave changed by a collimator lens; generating a wavelength error signal from a difference between both of divided pieces of light from transmitted light or reflected light; and locking a wavelength of a diode laser device according to the wavelength error signal.