Patent Number: 6,515,276

Title: Heterodyne optical spectrum analyzer with provisions for intensity noise subtraction

Abstract: A coherent optical spectrum analyzer is provided in which an optical balancing tone having a specific signature is injected into a signal path of a balanced optical receiver. A measuring unit is provided to analyze the balancing tone component in the signal output from the balanced optical receiver and determine characteristics of the optical receiver. A compensation unit is provided for providing compensation to counter, or negate any imbalances determined via the measuring unit. The balanced optical receiver is preferably a polarization state independent optical receiver.

Inventors: Baney; Douglas M. (Los Altos, CA), Szafraniec; Bogdan (Sunnyvale, CA)

Assignee: Agilent Technologies, Inc.

International Classification: H04B 10/08 (20060101); H04B 10/142 (20060101); H04B 10/148 (20060101); H04B 010/18 ()

Expiration Date: 02/04/2011