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:
Apr. 03, 2007
Filed:
Oct. 24, 2002
Yasuhiro Yamauchi, Kawasaki, JP;
Yuichi Kawahata, Kawasaki, JP;
Nobuaki Mitamura, Sapporo, JP;
Hirohiko Sonoda, Sapporo, JP;
Yasuhiro Yamauchi, Kawasaki, JP;
Yuichi Kawahata, Kawasaki, JP;
Nobuaki Mitamura, Sapporo, JP;
Hirohiko Sonoda, Sapporo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A dispersion compensator comprising a VIPA is configured so as to reflect light with each wavelength at an angle varying depending on wavelength when the light is reflected off a mirror. When being coupled at the end of an input fiber, the light with each wavelength is coupled at a specific angle. If the light is coupled with the fiber at a specific angle, coupling efficiency degrades. Therefore, in this case, coupling loss increases. Light having a wavelength with high transmittance in the VIPA is coupled with the fiber at a large angle, while light with a low transmittance is efficiently coupled with the fiber at a small angle or no angle. In this way, the round-top wavelength characteristic of the VIPA can be leveled.