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. 12, 2010
Filed:
Dec. 29, 2005
Yasuhiro Yamauchi, Kawasaki, JP;
Hirohiko Sonoda, Yokohama, JP;
Hiroyuki Furukawa, Kawasaki, JP;
Yoshinobu Kubota, Kawasaki, JP;
Yasuhiro Yamauchi, Kawasaki, JP;
Hirohiko Sonoda, Yokohama, JP;
Hiroyuki Furukawa, Kawasaki, JP;
Yoshinobu Kubota, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A chromatic dispersion compensator of present invention includes a high-refractive-index VIPA plate, a three-dimensional mirror, and a control unit. The high-refractive-index VIPA plate is made of a material such as silicon having a refractive index higher than that of optical glass and is able to output incident lights toward different directions according to wavelength. The three-dimensional mirror reflects the light of each wavelength emitted from the high-refractive-index VIPA plate, at a predetermined position and returns the light to the VIPA plate. The control unit controls a temperature of the high-refractive-index VIPA plate at a constant level while controlling the position of the three-dimensional mirror corresponding to a chromatic dispersion compensation amount. Thereby, larger chromatic dispersion can be compensated while a decrease in transmission bandwidth is suppressed.