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:
Oct. 12, 1999
Filed:
Sep. 10, 1997
Hideki Okuno, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Disclosed is an optical amplification device comprising a pulser for pulsing a multi-channel signal which has been wavelength division multiplexed; a pulse signal disperser for dispersing the pulsed signal at each wavelength and outputting a dispersed pulse signal; and an optoelectronic converter for converting the dispersed pulse signal to an electrical signal. The number of channels of a multi-channel signal can be counted by counting the number of peaks in a time waveform of the electrical signal. The pulse signal disperser can be realized by using a high dispersion medium having high wavelength dispersion. The pulser can be realized by using an optical switch utilizing a mechanical, acousto-optical or electro-optical effects. The optical signal channel counter can be applied in an optical amplification device and stable optical amplification can be performed by counting the number of channels of an inputted optical signal and outputting pump light in compliance with said number of channels. The number of channels of a multi-channel signal can thus be counted accurately and the configuration of the counter which executes counting can be simplified.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile