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:
Jan. 26, 1993
Filed:
Jan. 18, 1991
Applicant:
Inventors:
Michio Waki, Tokyo, JP;
Shinzo Takada, Tokyo, JP;
Assignee:
Kabushiki Kaisha TOPCON, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 38 ; 372 26 ; 372 27 ; 372 29 ;
Abstract
A semiconductor laser drive apparatus having a semiconductor laser source (LD) for generating a laser light; a switching means (Q2) for supplying the semiconductor laser source (LD) with a first modulated signal (S2) for driving the semiconductor laser source (LD) on the basis of a second modulated signal (S1); a current source (6) for supplying the switching means (Q2) with a current for producing the first modulated signal (S2) in the switching means (Q2); and a bias adjust means (VR) for adjusting a bias direct-current to be added to the first modulated signal (S2).