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:
May. 08, 2007
Filed:
Aug. 11, 2003
Han-lim Lee, Seoul, KR;
Seong-taek Hwang, Pyongtaek-shi, KR;
Hee-won Cheung, Seoul, KR;
Yun-je OH, Yongin-shi, KR;
Ji-chai Jeong, Seoul, KR;
Byung-chang Kang, Yongin-shi, KR;
Han-Lim Lee, Seoul, KR;
Seong-Taek Hwang, Pyongtaek-shi, KR;
Hee-Won Cheung, Seoul, KR;
Yun-Je Oh, Yongin-shi, KR;
Ji-Chai Jeong, Seoul, KR;
Byung-Chang Kang, Yongin-shi, KR;
Samsung Electronics Co., Ltd., Suwon-Si, Gyeonggi-Do, KR;
Abstract
Disclosed is a duobinary optical transmitter, which includes a laser source for outputting light with a predetermined wavelength; a Mach-Zehnder interferometer-type optical intensity modulator for modulating the intensity of the light according to a three-level data signal inputted through a modulation terminal; a low-pass filter for converting an inputted two-level binary data signal into a three-level data signal through an interference among codes; and, a modulator driver/amplifier for amplifying the three-level data signal and then outputting it to the modulation terminal, wherein the overall bandwidth of the low-pass filter, the modulator driver/amplifier, and the optical intensity modulator corresponds to approximately ¼ of the clock frequency of the two-level binary data signal.