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:
Sep. 30, 2014
Filed:
Mar. 01, 2012
Hiroki Ooi, Kawasaki, JP;
Hiroki Ooi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A wavelength selective switch includes a wavelength dispersing element, a wavelength converging element, multiple transmission control elements, and a controller. The wavelength dispersing element performs wavelength dispersion of input signal light. The transmission control element divides input signal light into wavelength bands within a channel band and transmits or cuts off the divided input signal light. The wavelength converging element converges signal light having respective wavelengths produced from the transmission control elements for output. The controller controls a transmittance of the transmission control element of at least one of the low and high frequency sides in a channel band. The wavelength selective switch sets as a cutoff band at least one of predetermined bands on the low and high frequency sides, narrows a transmission band of the input signal light to be wavelength-multiplexed, deletes an overlapped band of optical spectra, and outputs the transmission signal light, thereby suppressing crosstalk.