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:
Dec. 04, 2001
Filed:
Mar. 27, 1998
Daniel Xiaoxing Zhu, Millersville, MD (US);
Ciena Corporation, Linthicum, MD (US);
Abstract
A simple and cost effective optical device is provided which locks the wavelength output of a laser transmitter in an optical transmission system as well as substantially reducing and/or eliminating signal crosstalk. A light source is coupled along an optical path to a filtering element. The light source has output frequency shifts based on variation in input current. The filtering element is configured with a reflectivity characteristic which corresponds to a first portion of the optical signal associated with one or more frequencies such that the reflectivity characteristic is greater than the output frequency variations associated with the light source.