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:
Oct. 12, 1993
Filed:
Jul. 06, 1992
Applicant:
Inventor:
Keith Johnson, Orland Park, IL (US);
Assignee:
Amoco Corporation, Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 38 ; 372 31 ; 372 29 ;
Abstract
A method and apparatus for reducing the effects of relative intensity noise in a diode laser system by sensing the light output of diode laser system and producing an electrical feedback signal; amplifying the feedback signal over at least two different parts of a frequency band that includes the Relaxation Oscillation Frequency of the laser system; shifting the phase of each of the amplified feedback signals over the frequency band; and superimposing onto the current supplied to the laser diode a current signal that is a function of each of the phase shifted and amplified feedback signals.