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:
Jun. 11, 2002
Filed:
Dec. 02, 1999
Masao Tsukitani, Kanagawa, JP;
Eisuke Sasaoka, Kanagawa, JP;
Toshiaki Okuno, Kanagawa, JP;
Shigeru Tanaka, Kanagawa, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to a dispersion-compensating module having a structure which compensates for the dispersion of an optical transmission line in a 1.55-&mgr;m wavelength band and adjusts loss fluctuations among signal wavelengths in the 1.55-&mgr;m wavelength band into an appropriate range. The dispersion-compensating module comprises a structure adapted to be installed in an already installed optical fiber transmission line, and has a loss slope with a polarity opposite to that of the optical fiber transmission line in the 1.55-&mgr;m wavelength band. One application of the dispersion-compensating module comprises a dispersion-compensating optical fiber as a dispersion-compensating device, and an optical fiber doped with a transition metal element as a loss-equalizing device. By the above configuration, the loss fluctuations among individual signal wavelengths in the whole transmission line including the dispersion-compensating module can be adjusted by the loss-equalizing device in the dispersion-compensating module so as to fail within an appropriate range.