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. 19, 2009
Filed:
Jun. 26, 2002
Akira Hirano, Yokohama, JP;
Yutaka Miyamoto, Yokohama, JP;
Masahito Tomizawa, Yokosuka, JP;
Shoichiro Kuwahara, Yokosuka, JP;
Hiroshi Takahashi, Atsugi, JP;
Yasuyuki Inoue, Isehara, JP;
Akira Hirano, Yokohama, JP;
Yutaka Miyamoto, Yokohama, JP;
Masahito Tomizawa, Yokosuka, JP;
Shoichiro Kuwahara, Yokosuka, JP;
Hiroshi Takahashi, Atsugi, JP;
Yasuyuki Inoue, Isehara, JP;
Nippon Telegraph & Telephone Corporation, Tokyo, JP;
Abstract
The present invention relates to an automatic dispersion compensating optical link system. Carrier suppressed RZ encoded optical signals generated using carrier suppressing means and binary NRZ code or partial response code, or carrier suppressed clock signals generated using carrier suppressing means and clock signals are transmitted on an optical transmission line. Two bands of the carrier suppressed RZ encoded optical signals or carrier suppressed clock signals transmitted on the optical transmission line are each divided into bands and are received. Phase information of the respective basebands is extracted from the binary NRZ code components or partial response code components or clock signals in each band and the relative phase difference thereof is detected. The chromatic dispersion value of the optical transmission line is then calculated from the relative phase difference.