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. 21, 2010
Filed:
Mar. 16, 2007
Aravanan Gurusami, New York, NY (US);
Douglas Llewellyn Butler, Painted Post, NY (US);
Timothy K. Zahnley, Spencer, NY (US);
Scott R. Dahl, Corning, NY (US);
Peter G. Wigley, Corning, NY (US);
Aravanan Gurusami, New York, NY (US);
Douglas Llewellyn Butler, Painted Post, NY (US);
Timothy K. Zahnley, Spencer, NY (US);
Scott R. Dahl, Corning, NY (US);
Peter G. Wigley, Corning, NY (US);
Oclaro (North America), Inc., San Jose, CA (US);
Abstract
The present invention generally relates to the operation of optical network equipment such as optical amplifiers. In one aspect, a method of operating an optical amplifier is provided such that output of the optical amplifier avoids the effects of operating an optical gain medium in a non-linear (kink) region of an L-I curve. The method generally includes operating an optical gain medium in a fully off state or fully on state above the kink region with a PWM signal. In another aspect, the effects of the kink region may be compensated for by utilizing a lookup table. A sample of the optical power of an amplified optical signal may be used to select an entry in the lookup table that compensates for non-linearities in the kink region. In yet a further aspect, a lookup table may be used to control a pulse modulator to compensate for non-linearites in the kink region of the L-I curve.