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, 2005
Filed:
Apr. 04, 2003
Applicants:
Kazuhiro Imai, Sendai, JP;
Kodo Kawase, Wako, JP;
Hiromasa Ito, Sendai, JP;
Inventors:
Assignee:
Riken, Saitama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F001/39 ; G02F001/35 ;
U.S. Cl.
CPC ...
Abstract
There are disclosed a nonlinear optical crystalwhich can generate a THz wave by a parametric effect; a pump light incidence apparatusfor allowing a pump lightto be incident upon the nonlinear optical crystal; and a seed light injection apparatusfor injecting a seed lighthaving a variable frequency in a generation direction of an idler lightgenerated by the pump light. The seed light injection apparatuscomprises angle dispersion compensation meansset so that an incidence angle θof the seed light upon the nonlinear optical crystalsubstantially equals to a desired phase matching condition regardless of a wavelength.