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:
Apr. 24, 2007
Filed:
Sep. 15, 2004
Wei-ching Chuang, Taipei, TW;
Ruey-fang Shyu, Yun-Lin Hsien, TW;
Hsiao-ping Liang, Kaushiong, TW;
Kun-yi Lee, Taipei, TW;
Wei-Ching Chuang, Taipei, TW;
Ruey-Fang Shyu, Yun-Lin Hsien, TW;
Hsiao-Ping Liang, Kaushiong, TW;
Kun-Yi Lee, Taipei, TW;
China Institute of Technology, Taipei, TW;
Abstract
The present invention discloses a tunable optical integrated element using liquid crystal as an active layer, which is applied to filters, couplers or optical add/drop multiplexer. The present invention includes a layer of liquid crystal as an active layer, a first waveguide with grating and a second waveguide, an isolation layer, a pair of electrodes. By applying the external voltage to control the direction of the liquid crystal, the refractive index of the waveguide changes in accordance with the modulation of the electric field. Thus invention has the features of simple structure, easy assembling, lower cost and integrating ability.