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:
Jun. 07, 2011
Filed:
Sep. 19, 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;
Abstract
There is provided an optical modulator capable of controlling the phase of a USB signal and the phase of an LSB signal of an optical FSK modulated signal. A modulation signal is applied to a main Mach-Zehnder electrode (or an electrode C) () of a main Mach-Zehnder waveguide (MZC) () to switch the USB signal and the LSB signal, and so FSK modulation can be made. In order to control the phase of the optical signal to be outputted from the main Mach-Zehnder waveguide (MZC) (), bias voltage is applied to the main Mach-Zehnder electrode (), and the phases of the USB signal and the LSB signal are controlled. By doing so, FSK modulation with adjusted phases can be performed.