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. 14, 2009
Filed:
Jun. 30, 2006
Fumio Futami, Kawasaki, JP;
Shigeki Watanabe, Kawasaki, JP;
Shunsuke Ono, Kawasaki, JP;
Ryou Okabe, Kawasaki, JP;
Fumio Futami, Kawasaki, JP;
Shigeki Watanabe, Kawasaki, JP;
Shunsuke Ono, Kawasaki, JP;
Ryou Okabe, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A first polarization controller controls a polarization state of measured light. A second polarization controller controls a polarization state of an optical sampling pulse. The measured light and the optical sampling pulse having the polarization states controlled are input to an optical fiber. An optical signal output from the optical fiber is transmitted to a polarizer. A first control unit adjusts the first polarization controller based on the measured light output from the optical fiber and the measured light output from the polarizer. A second control unit adjusts the second polarization controller based on an optical sampling pulse output from the optical fiber. Waveform measurement is performed by using the output of the polarizer.