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:
Apr. 22, 2008
Filed:
Jun. 10, 2003
Sung-kee Kim, Seoul, KR;
Han-lim Lee, Seoul, KR;
Yun-je OH, Yongin-shi, KR;
Seong-taek Hwang, Pyongtaek-shi, KR;
Sung-Kee Kim, Seoul, KR;
Han-Lim Lee, Seoul, KR;
Yun-Je Oh, Yongin-shi, KR;
Seong-Taek Hwang, Pyongtaek-shi, KR;
Samsung Electronics Co., Ltd., Yeongtong-Gu, Suwon-Si, Gyeonggi-Do, KR;
Abstract
Disclosed is a duobinary optical transmission apparatus. The duobinary optical transmission apparatus uses the crossed phase characteristics of a duobinary signal without using a feedback-type precoder and an electric LPF, and is thereby not affected by Pseudo-Random Bit Sequence (PRBS), and is very resistant to wavelength division characteristics. In addition to a drive amplifier, a Mach-Zehnder-interferometer-type optical intensity modulator (MZ MOD), and a laser source for generating a carrier wave, the duobinary optical transmission apparatus further includes a toggle flip-flop (T.FF) and an AND gate to separate a group of '1' from input data signal in such a way that the input data signal is modulated to make each signal have a different phase.