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:
Nov. 19, 2002
Filed:
Sep. 17, 1998
Waleed A. Asous, Allentown, PA (US);
Robert L. Hartman, Warren Township, NJ (US);
Padman Parayanthal, Clinton Township, NJ (US);
Agere Systems Inc., Miami Lakes, FL (US);
Abstract
Optical sources, such as electro-absorption modulator isolated laser modules (EMILMs), for fiber optical communication systems are selected based on noise measures made outside—and preferably substantially outside—of the communication system's operational bandwidth. In one embodiment, EMILM devices are selected for communication systems having path lengths of 640 km or more based on both the chirp of the devices and the relative intensity noise (RIN) of the devices at the relaxation oscillation frequency F . Devices having both low chirp and low RIN at F are more likely to meet bit error rate requirements than are devices selected solely for low chirp.