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. 18, 1989
Filed:
Feb. 08, 1988
Syuji Suzuki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical matrix switch comprises 1.times.M/2 optical switch means of N in number, optical switch groups of N/2 in number, and N/2.times.1 optical switch means of M in number, where N is a number of inputs, and M is a number of outputs. Each of the 1.times.M/2 optical switch means includes a predetermined number of optical switch elements each having a function to switch an optical signal between inputs and outputs in accordance with an applied electric field, and has one input and outputs of M/2 in number. The predetermined number is decided dependent on an equation of log.sub.2 M/2. Each of the optical switch groups includes optical switch elements of M/2 in number arranged transversely, and each of the N/2.times.1 optical switch means includes a predetermined number of optical switch elements. The predetermined number is decided dependent on an equation of log.sub.2 N/2. A longitudinal length of the optical matrix switch is approximately (log.sub.2 M/2+1+log.sub.2 N/2 times a length of an optical switch element. Therefore, the optical matrix switch is made smaller in the longitudinal direction.