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:
May. 21, 1985
Filed:
Jun. 30, 1982
William P Dumke, Chappaqua, NY (US);
Jerry M Woodall, Bedford Hills, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A semiconductor processor for signals such as are conveyed by fiber optics wherein the processor structure accommodates lattice mismatch and minimizes the effect of misfit dislocations. The structure permits using materials having favorable absorption properties at the 1 micrometer wavelength of optical signals. A binary semiconductor is employed with graded regions produced by adding a different third ingredient in two places so that a wide band optically transparent emitter with a graded base and graded collector are provided. The ingredients impart a strong absorption in the optical signal wavelength together with superior semiconductor carrier transit time. A structure for a silicon and germanium oxide based optical signal fiber uses a GaAlAs emitter, a base that is graded to Ga.sub.0.25 In.sub.0.75 As at the collector and then back to GaAs at the substrate.