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:
Feb. 15, 2005
Filed:
Jul. 16, 2002
I-jen Lai, Taichung, TW;
Pie-yau Chien, Taichung, TW;
Chin-hsiang Wang, T.E.P.E., TW;
Yu-ting Lee, T.E.P.E., TW;
Tsung-yueh Tsai, T.E.P.E., TW;
Chih-hsien Lin, T.E.P.E., TW;
I-Jen Lai, Taichung, TW;
Pie-Yau Chien, Taichung, TW;
Chin-Hsiang Wang, T.E.P.E., TW;
Yu-Ting Lee, T.E.P.E., TW;
Tsung-Yueh Tsai, T.E.P.E., TW;
Chih-Hsien Lin, T.E.P.E., TW;
Asia Optical Co., Inc., T.E.P.E., TW;
Abstract
A method of fabricating a WDM unit consists of attaching a first and a second GRIN lenses to opposite faces of a WDM filter. A dual fiber pigtail and a single fiber pigtail are mounted in corresponding glass tubes. The glass tube with the dual fiber pigtail and the glass tube with the single fiber pigtail are mounted on the second GRIN lens and the first GRIN lens respectively. The position of the dual fiber pigtail and the single fiber pigtail are adjusted with respect to the second GRIN lens and the first GRIN lens respectively to obtain the best optical property. The invention prevents the WDM filter from tilting during temperature variation by sandwiching the WDM filter in between the two GRIN lenses, and further prevents the WDM unit from increasing the reflection loss and insertion loss.