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. 11, 2008
Filed:
Sep. 26, 2002
Liping Chen, San Jose, CA (US);
David Piehler, Half Moon Bay, CA (US);
Adi Bonen, Los Gatos, CA (US);
Jumin (Jerry) Liu, Cupertino, CA (US);
LiPing Chen, San Jose, CA (US);
David Piehler, Half Moon Bay, CA (US);
Adi Bonen, Los Gatos, CA (US);
Jumin (Jerry) Liu, Cupertino, CA (US);
Harmonic, Inc., Sunnyvale, CA (US);
Abstract
Optical transceivers used in data communications equipment are typically bidirectional and require two-way communications in order to maintain their operability. However, in some applications such as cable television, the traffic is highly unbalanced with very high bandwidth requirements in one direction and minimal bandwidth requirements in the opposite direction. Hence for such efficient and cost effective one-way communication applications, unidirectional fiber optic transceivers are useful. There is provided here a unidirectional transceiver provided internally with a keep-alive signal generator to enable unidirectional transmissions. The keep alive signal is, for instance, idle characters for a Gigabit Ethernet communication system, or any other suitable handshake signal which provides the desired operability.