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. 03, 2007
Filed:
Mar. 22, 2005
Tetsuya Kawanishi, Koganei, JP;
Masayuki Izutsu, Koganei, JP;
Kaoru Higuma, Tokyo, JP;
Shingo Mori, Tokyo, JP;
Tetsuya Kawanishi, Koganei, JP;
Masayuki Izutsu, Koganei, JP;
Kaoru Higuma, Tokyo, JP;
Shingo Mori, Tokyo, JP;
Abstract
An optical SSB modulator capable of appropriately adjusting a phase difference of light in the MZ waveguides and automatically adjusting a voltage impressed to the bias adjustment electrodes is provided. The above-mentioned object is achieved by an optical SSB modulator () provided with a first sub Mach-Zehnder waveguide (MZ) (), a second sub Mach-Zehnder waveguide (MZ) (), a main Mach-Zehnder waveguide (MZ) (), a first bias adjustment electrode (DCelectrode) (), a second bias adjustment electrode (DCelectrode) (), a first modulation electrode (RFelectrode) (), a second modulation electrode (RFelectrode) () and a third bias adjustment electrode (DCelectrode) (), wherein either one of or both of output portions () of the MZand the MZhave an X-branching form, and specifically having one of light paths of the X-branching connected to a photodetector.