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. 11, 1995
Filed:
Mar. 04, 1994
Peter A Wolff, Princeton, NJ (US);
NEC Research Institute Inc., Princeton, NJ (US);
Abstract
An optical switching device comprises a material which exhibits third order optical nonlinearity (X.sup.(3)) at frequencies just below the band gap of the material, a room temperature and at a wavelength of approximately 1.55.mu.. The switching device is particularly useful for optical communication applications. The preferred material is n-Al.sub.x Ga.sub.1-x Sb, where x is approximately 0.1. Additional preferred materials are those which have a band gap (at .GAMMA.) just above the photon energy of the system and have a subsidiary conduction band (at X or L) approximately 0.1 ev above the E.sub.o level at .GAMMA. at a predetermined wavelength. Such alloy systems include (AlGaIn)As with 0.635.mu..ltoreq..lambda..ltoreq.0.672.mu., and (AlGaIn)P with 0.56.mu..ltoreq..lambda..ltoreq.0.65.mu..