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:
May. 02, 2006
Filed:
Mar. 12, 2003
Eric V. Chamness, Moutain View, CA (US);
Jenkin A. Richard, Palo Alto, CA (US);
Yiqiang LI, San Jose, CA (US);
Eric V. Chamness, Moutain View, CA (US);
Jenkin A. Richard, Palo Alto, CA (US);
Yiqiang Li, San Jose, CA (US);
Oplink Communications, Inc., Fremont, CA (US);
Abstract
A low cost compact integrated 4-port single-channel OADM with improved optical isolation and low insertion loss is provided in which a 4-fiber pigtail includes I/O fibers and add/drop fibers, which are arranged on the same side of the multiplexer. A lens, filter and reflector are arranged in a double-pass configuration to route the optical signals to and from the appropriate fibers. The fibers are suitably arranged with the input and drop fibers at the corners of one diagonal and the output and add fibers at the corners of the crossing diagonal with the midpoints of the diagonals intersecting. Furthermore, a point halfway between the input and output fibers suitably lies at or near the central axis of the collimating lens.