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. 09, 1999
Filed:
Oct. 07, 1997
Christopher P Wyland, Santa Clara, CA (US);
Integrated Device Technology, Inc., Santa Clara, CA (US);
Abstract
A laser diode alignment package has a substrate with capacitive alignment pads. A charge generator is configured to charge or discharge each of the capacitive alignment pad to a respective voltage in response to an instruction from a processor. A laser diode chip has a conductive die paddle rigidly attached thereto and the laser diode chip is movably positioned on the substrate. The conductive die paddle is positioned with respect to the alignment pads such that when the respective voltages are applied the capacitive alignment pads, Coulomb forces will move the conductive die paddle with respect to the substrate. A feedback mechanism measures the optical power passing through the optical fiber. A processor estimates based on this measured optical power level what voltage should be applied to each of the capacitive coupling pads in order to apply Coulomb forces necessary to align the laser diode chip to the optical fiber. The processor then sends charging instructions to the charge generator. The alignment process can be fully automated thus minimizing the risk of human error. The structure and method require few, if any, moving mechanical parts in order to align the laser and requires little or no heavy equipment.