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:
May. 31, 2005
Filed:
Jul. 12, 2002
Kohei Tsunetomo, Tokyo, JP;
Naoki Tsukiji, Tokyo, JP;
Junji Yoshida, Tokyo, JP;
Naoki Hayamizu, Tokyo, JP;
Takashi Koseki, Tokyo, JP;
Kohei Tsunetomo, Tokyo, JP;
Naoki Tsukiji, Tokyo, JP;
Junji Yoshida, Tokyo, JP;
Naoki Hayamizu, Tokyo, JP;
Takashi Koseki, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A package accommodates an LD device for emitting laser light with the center wavelength of which is in a range of 1300 to 1440 nm and airtight seals a light path extending from the LD device to an incident end of an optical fiber. The package is filled with a nitrogen gas at a standard atmospheric pressure with the amount of moisture limited to a value lower than 100000 ppm by volume or less. Therefore, the amount of moisture in the light path for laser light within the package is limited to 100000 ppm by volume or less.