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:
Nov. 14, 1995
Filed:
Oct. 13, 1994
Applicant:
Inventors:
Kazuhisa Kaede, Tokyo, JP;
Isamu Takano, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04B / ;
U.S. Cl.
CPC ...
359175 ; 359176 ; 359177 ; 359179 ; 359183 ;
Abstract
An optical transmission system that can perform not only amplification of optical signal level but also dispersion pre-equalization, as the signals are optical. In this invention, optical power level of an optical signal propagating through the dispersion medium is amplified in the optical amplifier. The signal becomes the optical signal a. A phase modulator driving circuit outputs a signal corresponding to the envelope signal of the optical signal a. An optical phase modulator phase-modulates the input optical signal a, outputs an optical signal d for which signal optimum dispersion pre-equalization is performed.