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:
Jul. 06, 2004
Filed:
Mar. 11, 2002
Takashi Nakabayashi, Yokohama, JP;
Noriaki Kaida, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A package contains therein a semiconductor laser element for emitting light and a semiconductor circuit element for driving the semiconductor laser element and is provided with an optical fiber supporting face and a back face. The optical fiber supporting face is provided for supporting an optical fiber for transmitting the light from the semiconductor laser element, and the back face is opposed to the optical fiber supporting face. The back face has a lead pin for feeding a positive-phase signal into the semiconductor circuit element and a lead pin for feeding a negative-phase signal into the semiconductor circuit element. The lead pins penetrate through the back face. The semiconductor circuit element receives positive-phase and complementary negative-phase signals, both including a high-frequency component of 10 GHz or higher, through the lead pins, converts these signals into a single-ended signal, and outputs the resulting signal to the semiconductor laser element.