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. 07, 2009
Filed:
Mar. 30, 2005
Ryo Shimizu, Tokyo, JP;
Taishi Maruyama, Tokyo, JP;
Tohru Sugamata, Tokyo, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Abstract
To provide a traveling-wave-type optical modulator and a method of adjusting the same, in which an occurrence of a jitter can be suppressed when an optical modulator is driven by using a driver, and, in particular, to provide a traveling-wave-type optical modulator and a method of adjusting the same, in which a degree of freedom is improved when combining the driver and the traveling-wave-type optical modulator and an occurrence of the jitter can be effectively suppressed even after combining the driver and the traveling-wave-type optical modulator. With reference to a traveling-wave-type optical modulator which includes a substrate having an electrooptic effect, an optical waveguide formed on the substrate, and a modulation electrode performing modulation control on a light wave propagating through the optical waveguide, a driver for controlling driving of the traveling-wave-type optical modulator is connected to the traveling-wave-type optical modulator, and a frequency characteristic (b) of an electro/optical conversion response of the traveling-wave-type optical modulator is adjusted so as to correct a frequency characteristic (a) of a gain of the driver. Preferably, in the adjustment of the frequency characteristic of the electro/optical conversion response, at least one of an impedance value of the modulation electrode or an impedance value of the resistor of termination is adjusted.