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:
Feb. 24, 2004
Filed:
Mar. 12, 2002
Akihito Otani, Atsugi, JP;
Toshinobu Otsubo, Atsugi, JP;
Hidehiko Takara, Yokosuka, JP;
Ippei Shake, Yokohama, JP;
Satoki Kawanishi, Yokohama, JP;
Other;
Abstract
A nonlinear optical crystal allowing type 2 phase matching multiplexes a fixed wavelength light having an angular frequency &ohgr; and a variable wavelength light having an angular frequency &ohgr; , with the polarization directions thereof being perpendicular to each other, so as to produce a sum frequency light having an angular frequency &ohgr; +&ohgr; . When multiplexing the fixed wavelength light and the variable wavelength light through the nonlinear optical crystal, a controlling section controls the polarization direction of the fixed wavelength light so as to be parallel to a predetermined reference axis within a plane vertical to a phase matching direction of the nonlinear optical crystal. Even when the wavelength of inputted light is changed, the predetermined reference axis is a single axis which maintains parallelism with the crystal axis of the nonlinear optical crystal.