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. 03, 2001
Filed:
Feb. 26, 1998
Byong-gwon You, Daejeon, KR;
Hyung-jae Lee, Seoul, KR;
Tae-hyung Rhee, Sungnam, KR;
Yong-woo Lee, Yongin, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A method for fabricating low-loss optically active device having an optical waveguide constructed of an optical waveguide core region (non-linear core region) necessitating the non-linear effect when waveguiding an optical signal, and an optical waveguide core region (linear core region) not necessitating the non-linear effect, the method includes method for fabricating an optically active device having an optical waveguide constructed of an optical waveguide core region (non-linear core region) necessitating the non-linear effect when waveguiding an optical signal, and an optical waveguide core region (linear core region) not necessitating the non-linear effect, the method includes the steps of: forming a lower clad layer having a refractive index lower than the material of the waveguide core regions and optical transparency on a substrate, forming a linear optical polymer layer on the lower clad layer by coating linear optical polymer having a refractive index lower than the material of the lower clad layer, forming a first metal layer at a region on the lower clad layer, other than the regions where the waveguide is to be disposed, etching a linear optical polymer layer without the first metal layer formed thereon, forming a non-linear optical polymer layer on the substrate having the non-linear core region, removing the non-linear optical polymer layer stacked to be higher than the waveguide core regions, removing the first metal layer, forming a second metal layer on the waveguide from which the first metal layer is removed, removing the linear optical polymer of the non-second metal layer portion, and forming an upper clad layer on the substrate with the linear optical polymer using a material having a refractive index lower than the waveguide core regions and optical transparency. The waveguide is formed using non-linear optical polymer only at the region where the non-linear effect such as optical modulation or optical switching occurs, and is formed using linear optical polymer at the remaining regions, thereby minimizing the overall waveguiding loss of the waveguide.