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:
Jun. 01, 2010
Filed:
Sep. 29, 2005
Paul Schatz, Burnsville, MN (US);
Dean Zavadsky, Shakopee, MN (US);
William J. Mitchell, Eden Prairie, MN (US);
Steve Stuart, Eden Prairie, MN (US);
Ana Santos, Minneapolis, MN (US);
Paul Schatz, Burnsville, MN (US);
Dean Zavadsky, Shakopee, MN (US);
William J. Mitchell, Eden Prairie, MN (US);
Steve Stuart, Eden Prairie, MN (US);
Ana Santos, Minneapolis, MN (US);
ADC Telecommunications, Inc., Eden Prairie, MN (US);
Abstract
Methods and systems for controlling optical power attenuation are provided. A method comprises periodically measuring an optical power of an optical signal received by an optical receiver and periodically measuring a first attenuation control signal voltage. When the optical power measurement is outside a target power range, the method continues with calculating a target voltage necessary to maintain the optical power measurements at a target power level; calculating a second attenuation control signal based on the target voltage, wherein the second attenuation control signal is calculated to provide an over-damped transient response that maintains the second attenuation control signal within a usable range of a variable optical power attenuator; applying a second attenuation control signal voltage based on the second attenuation control signal to the variable optical power attenuator; and adjusting attenuation of the optical signal based on the second attenuation control signal voltage.