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:
Mar. 06, 2012
Filed:
Jan. 27, 2009
Shigeru Tokita, Yokohama, JP;
Hiroo Matsue, Yokohama, JP;
Akira Kuwahara, Fujisawa, JP;
Opnext Japan, Inc., Kanagawa, JP;
Abstract
Provided is an optical transmission circuit capable of realizing a high-quality optical signal waveform with low power consumption. An optical transmission circuit () includes: a laser diode (); a modulator () for supplying a differential modulation current to an anode terminal and a cathode terminal of the laser diode () through transmission lines (to); a current source () for supplying a forward bias current to the laser diode (); and a magnetic sheet (wave absorber) () disposed so as to cover at least a part of the transmission lines (and). An impedance of the laser diode () is lower than characteristic impedances of the transmission lines (to) which are formed so that the characteristic impedances thereof are matched to an output impedance of the modulator ().