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:
Feb. 14, 2006
Filed:
Jan. 07, 2003
James E. Roddy, Rochester, NY (US);
William R. Markis, Spencerport, NY (US);
James E. Roddy, Rochester, NY (US);
William R. Markis, Spencerport, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A system and method of stabilizing laser output levels includes a laser (), an injection circuit for injecting a radio frequency waveform, and a control circuit for energizing and stabilizing the laser. The radio frequency waveform injected by the injection circuit has a high duty cycle to maintain high output power while providing a stable multimode spectrum. A back facet photodiode sensor () detects radiation emitted from a back facet semiconductor laser () and provides a feedback signal to the control circuit () for maintaining the laser output power. The response of the photodiode is not fast enough to track intensity variations due to the RF waveform, and thus provides feedback to the control circuit () only when there is a substantial need to adjust laser power.