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. 29, 1995
Filed:
Mar. 14, 1994
Applicant:
Inventors:
Robbin A Reeder, Hawthorne, CA (US);
Kuei-Ru Chien, Cerritos, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01K / ;
U.S. Cl.
CPC ...
356-501 ; 356-509 ; 356-511 ; 356 28 ;
Abstract
A system is provided that corrects the undesirable fast power modulation observed at an output of a wideband frequency modulated (FM) laser. The correction is accomplished by applying a corrective voltage to an amplitude modulated (AM) modulator. The response of the laser is first measured to characterize the laser. Iterative predictions of appropriate voltage correction waveform, based upon the observed power modulation and the laser's response are then applied to the AM modulator to reduce the unwanted laser power modulation.