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:
Aug. 24, 2010
Filed:
Nov. 14, 2008
Roman T. Rowinski, South Hadley, MA (US);
Gregory J. Mcbrien, Glastonbury, CT (US);
Karl Kissa, West Simsbury, CT (US);
Eric Lim, Simsbury, CT (US);
Roman T. Rowinski, South Hadley, MA (US);
Gregory J. McBrien, Glastonbury, CT (US);
Karl Kissa, West Simsbury, CT (US);
Eric Lim, Simsbury, CT (US);
JDS Uniphase Corporation, Milpitas, CA (US);
Abstract
A Mach-Zehnder (MZ) interferometer modulator structure for fiberoptic telecommunications is disclosed in which drift of the operating point can be monitored with a reduced phase tracking error. One or more components of free-space light radiated into the substrate of the MZ modulator are selectively detected with one or more photodetectors. Suitable summing circuits are described for nulling out undesired photocurrent contributions in the photodetector(s) from on-state and off-state light radiated from the MZ.