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:
Nov. 01, 2005
Filed:
Apr. 13, 2004
Yasuo Shibata, Kanagawa, JP;
Yasuhiro Suzuki, Kanagawa, JP;
Yoshihisa Sakai, Kanagawa, JP;
Yasumasa Suzaki, Kanagawa, JP;
Akira Okada, Tokyo, JP;
Kazuto Noguchi, Kanagawa, JP;
Rieko Sato, Tokyo, JP;
Yasuo Shibata, Kanagawa, JP;
Yasuhiro Suzuki, Kanagawa, JP;
Yoshihisa Sakai, Kanagawa, JP;
Yasumasa Suzaki, Kanagawa, JP;
Akira Okada, Tokyo, JP;
Kazuto Noguchi, Kanagawa, JP;
Rieko Sato, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A light-controlled light modulator can achieve high-speed, low-loss wavelength conversion. Continuous light with a wavelength λj is launched into an MMI coupler via a port, and is split into two parts by the MMI coupler, which are led to a loop-type interferometer. In the loop-type interferometer, the two parts travel separately around the loop as clockwise traveling light and counterclockwise traveling light, are combined by the MMI coupler again via a filter-equipped phase modulator, thereby being emitted to the port. In this state, signal light λi(s) with a wavelength λi is launched into the filter-equipped phase modulator via a port. Even when the wavelength λi of the signal light λi(s) is equal to the wavelength λj of the wavelength converted output light, the wavelength conversion can be achieved with preventing noise from being mixed into the output light emitted from a port.