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. 06, 2009
Filed:
May. 19, 2004
Han-lim Lee, Seoul, KR;
Gyu-woong Lee, Suwon-si, KR;
Yun-je OH, Yongin-si, KR;
Seong-taek Hwang, Pyeongtaek-si, KR;
Han-Lim Lee, Seoul, KR;
Gyu-Woong Lee, Suwon-si, KR;
Yun-Je Oh, Yongin-si, KR;
Seong-Taek Hwang, Pyeongtaek-si, KR;
Samsung Electronics Co., Ltd., Yeongtong-Gu, Suwon-Si, Gyeonggi-Do, KR;
Abstract
A duobinary optical transmission device provides duobinary optical transmission with improved quality by a technique that does not require an electrical low pass filter LPF.A duobinary optical transmission device includes at least one semiconductor optical amplifier (SOA). A light source outputs a carrier wave as an optical signal. A precoder encodes an input of a non-return-to-zero (NRZ) electrical signal. An interferometer type semiconductor optical amplification unit modulates the carrier wave according to a change of an applied bias current coupled to the encoded signal. An optical band pass filter (OBPF) receives the phase-modulated optical signal from the semiconductor optical amplification unit, filters the received phase-modulated optical signal according to a designated band, and outputs an optical duobinary signal.