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. 29, 2010
Filed:
Jan. 23, 2004
Toshihiko Hirooka, Sendai, JP;
Masataka Nakazawa, Sendai, JP;
Toshihiko Hirooka, Sendai, JP;
Masataka Nakazawa, Sendai, JP;
Abstract
To compensate a waveform distortion by using a nature that a spectral shape is perfectly retained even if all the linear distortions occur on a time-axis. An optical pulse transmitted from an optical pulse transmitter () via an optical fiber transmission line () is transmitted. An optical Fourier transformer () receives an optical pulse, and optically Fourier-transforms an optical pulse on a time-axis onto a frequency-axis to reproduce the frequency spectrum of an optical pulse on a time-axis be effecting switching between frequency and time, thereby compensating a waveform distortion by a linear effect on the optical fiber transmission line (). A photodetector () receives an optical pulse from the optical Fourier transformer () and transforms this into an electrical signal to thereby obtain a pulse waveform before a transmission over the optical fiber transmission line ().