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:
Oct. 15, 2013
Filed:
Sep. 27, 2007
Ryo Shimizu, Chiyoda-ku, JP;
Takahisa Fujita, Chiyoda-ku, JP;
Toru Sugamata, Chiyoda-ku, JP;
Sumitomo Osaka Cement Co., Ltd., Chiyoda-ku, Tokyo, JP;
Abstract
An object of the invention is to provide a traveling-wave-type optical modulator capable of adjusting the frequency characteristics of an electric/optical conversion response over a wide frequency band, preventing the occurrence of jitter, and improving optical transmission characteristics. A traveling-wave-type optical modulatorincludes: a substrate that has an electro-optical effect; an optical waveguide that is formed on the substrate; a modulating electrode that controls the modulation of a light wave traveling through the optical waveguide and includes a signal electrode portionand a ground electrode portion; an input interfacethat is connected to an input side of the signal electrode portion; a terminatorthat is connected to the end of the signal electrode portion; and an adjustment filterthat is provided between the input interface and the signal electrode portion and adjusts frequency characteristics. It is preferable that the adjustment filterbe a passive filter.