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. 12, 2001
Filed:
Feb. 11, 1999
Takumi Fujiwara, Nagoya, JP;
Akira Ikushima, Nagoya, JP;
Other;
Abstract
A core section (,) is formed in an optical fiber (,) made of a glass material and, electrodes (,and,) are inserted into the clad section (,) of the fiber (,). When the core section (,) is irradiated with ultraviolet rays in prescribed intensity patterns while a high voltage is applied to the electrodes (,and,), a grating section (,) in which non linear areas (,) and normal areas (,) are alternately formed is formed in the section (,). The characteristics of the grating section (,) can be changed by utilizing an electrooptic effect by impressing a prescribed electric field upon the section (,) through the electrodes (,and,). A grating element constituted in such a way can be utilized as an optical functional element, such as the wavelength switch, because the Bragg wavelength of the element changes when a voltage is applied.