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:
Mar. 20, 2007
Filed:
Aug. 09, 2005
Toshio Sakane, Tokyo, JP;
Tsutomu Saitou, Tokyo, JP;
Susumu Murata, Tokyo, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Abstract
The present invention provides an optical modulation element module capable of stably operating for long periods without limiting the operating conditions. An optical modulation element module comprising an optical modulation element, a casewith said optical modulation element being integrated thereto, input output fibersbeing connected to said optical modulation element and also guided to an exterior of said case, a terminal for introducing a modulating signal and a bias adjustment voltage that are to be applied to said optical modulation element, said case being hermetically sealed, is characterized in that said caseis made of a material having almost the same coefficient of linear expansion as the optical modulation element, said optical modulation element is affixed to said case by using a thermoplastic and high-elastic adhesive material, a linear expansion difference between each material of said case and said fiber is less than 16×10/° C., and a distance between a fixed point of said fiber with said case, and a fixed point of said fiber with said optical modulation element is more than 3 mm.