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:
Aug. 21, 2007
Filed:
Mar. 04, 2004
Shigeo Kittaka, Osaka, JP;
Kazuaki Oya, Osaka, JP;
Masatoshi Nara, Osaka, JP;
Keiji Tsunetomo, Osaka, JP;
Takahiro Asai, Osaka, JP;
Shigeo Kittaka, Osaka, JP;
Kazuaki Oya, Osaka, JP;
Masatoshi Nara, Osaka, JP;
Keiji Tsunetomo, Osaka, JP;
Takahiro Asai, Osaka, JP;
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Abstract
In a waveguide element using a photonic crystal including a core formed of a photonic crystal having a refractive index periodicity in at least two directions perpendicular to a propagation direction of an electromagnetic wave and a cladding arranged in contact with the core in order to confine the electromagnetic wave in the core, an incident side phase modulation portion is provided for allowing an electromagnetic wave that is coupled to a band on or near a Brillouin zone boundary in a photonic band structure in the core and propagates in the core to enter the core.