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:
Sep. 25, 1990
Filed:
Oct. 31, 1988
Applicant:
Inventor:
George Bu-Abbud, Plano, TX (US);
Assignee:
Reliance Comm/Tec Corporation, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; H01S / ;
U.S. Cl.
CPC ...
356 731 ; 250205 ;
Abstract
A closed loop control system for a laser which is used in an instrument which may be an optical time domain reflectometer. The system uses the output light of the laser and the light from a fiber to which the laser light is connected to initially set the bias and pulse current amplitudes to the laser and adjust the gain of the receiver which is part of the control system. The control system also responds to light from the fiber to continuously control the pulse current amplitude and receiver gain so that the amplitude of the electrical signal representative of that light is kept within the operating range of the receiver electronics.