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:
Dec. 17, 2002
Filed:
Mar. 02, 2000
Jorge Sanchez, Poway, CA (US);
CEYX Technologies, San Diego, CA (US);
Abstract
A method for calibrating a laser module system includes the processes of connecting testing equipment used for laser calibration to the laser output; setting preamplifier gain to nominal; connecting input of preamplifier to ground; turning off the DC bias for laser; canceling the offset voltage of the preamplifier; recording the monitoring photodiode dark current; incrementing the DC bias to the laser; reading P ; computing dP /dI ; setting the DC bias to threshold; recording P ; recording the photodiode current I ; recording the temperature of laser module; connecting the preamplifier to provide a V input signal to the laser module input increment preamplifier gain G while reading power output P with instrument; determining the preamplifier gain G needed to obtain full scale output of laser power (P ); determining the corresponding photodiode current for above condition I ; calculating the effective responsivity R of the module containing the laser and the photodiode; and storing the effective module responsivity R in memory.