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:
Dec. 14, 2010
Filed:
Aug. 08, 2006
Tetsuya Kawanishi, Tokyo, JP;
Masayuki Izutsu, Tokyo, JP;
Takahide Sakamoto, Tokyo, JP;
Masahiro Tsuchiya, Tokyo, JP;
Tetsuya Kawanishi, Tokyo, JP;
Masayuki Izutsu, Tokyo, JP;
Takahide Sakamoto, Tokyo, JP;
Masahiro Tsuchiya, Tokyo, JP;
National Institute of Information and Communications Technology, Koganei-Shi, Tokyo, JP;
Abstract
The present invention is to provide an optical modulating system for generating a signal of a frequency (f+2f) and a signal of a frequency (f−2f) and suppressing a signal of a frequency (f) by a DSB-SC modulator. A fourth harmonic generating system for solving the above problem comprises a first DSB-SC modulator () a second DSB-SC modulator () and a signal control section () for controlling a modulating signal from a signal source () for generating modulating signals applied to the first and second DSB-SC modulators () so that a lower side-band signal (f) generated by modulating the upper side-band signal of the DSB-SC modulator () by the DSB-SC modulator () and an upper side-band signal (f) generated by modulating the lower side-band signal of the DSB-SC modulator () by the DSB-SC modulator () cancel each other.