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. 20, 2005
Filed:
Dec. 12, 2000
Jesse Chin, Hillsborough, CA (US);
Miaobin Gao, San Jose, CA (US);
Robert Elsheimer, San Jose, CA (US);
Matthew Scott Abrams, Santa Clara, CA (US);
Heng-ju Cheng, Mountain View, CA (US);
Takashi Hidai, Palo Alto, CA (US);
Myunghee Lee, San Jose, CA (US);
Song Liu, San Jose, CA (US);
Jesse Chin, Hillsborough, CA (US);
Miaobin Gao, San Jose, CA (US);
Robert Elsheimer, San Jose, CA (US);
Matthew Scott Abrams, Santa Clara, CA (US);
Heng-ju Cheng, Mountain View, CA (US);
Takashi Hidai, Palo Alto, CA (US);
Myunghee Lee, San Jose, CA (US);
Song Liu, San Jose, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
A laser driver for generating drive waveforms that are suitable for driving a single VCSEL or an array of VCSELs. A digital controller is integrated into the laser driver and is utilized to initially program and selectively adjust during the operation of the driver one or more of the following VCSEL drive waveform parameters: (1) bias current, (2) modulation current, (3) negative peaking depth, and (4) negative peaking duration. The laser driver has an aging compensation mechanism for monitoring the age of the laser and for selectively adjusting the dc and ac parameters of the VCSEL drive waveform to compensate for the aging of the laser. The laser driver also has a temperature compensation mechanism for monitoring the temperature of the driver IC and selectively adjusting the dc and ac parameters of the VCSEL drive waveform to compensate for the changes in temperature.