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:
Sep. 21, 2004
Filed:
Mar. 29, 2002
Kazuo Fujiura, Ibaraki, JP;
Shogo Yagi, Ibaraki, JP;
Tadayuki Imai, Ibaraki, JP;
Koji Enbutsu, Ibaraki, JP;
Masahiro Sasaura, Ibaraki, JP;
Takashi Kurihara, Ibaraki, JP;
Makoto Abe, Ibaraki, JP;
Seiji Toyoda, Ibaraki, JP;
Eishi Kubota, Ibaraki, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A wavelength converter implements high speed, high efficiency, low noise wavelength conversion without performing high voltage poling of a crystal, and enables switching and modulation of converted light in response to an electric field. A KLTN crystal, includes a deposited-gold electrode within its incidence plane, and is connected to a DC power supply via a copper wire. The crystal material is composed of KTa Nb O and/or K Li Ta Nb O . A polarizer controls the polarization of the fundamental wave in the direction parallel to the electric field, and launches it into the electrode of the KLTN crystal. The KLTN crystal, rotating on an axis in the direction of the electric field, launches only part of the generated SHG light with the same polarization direction as that of the incident light into a photo multiplier tube through a polarizer.