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:
Dec. 05, 1978
Filed:
Mar. 29, 1977
William K Burns, Alexandria, VA (US);
A Fenner Milton, Washington, DC (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An optical waveguide power divider which uses a two-dimensional slab waveguide. An input confined to one arm propagates to a point where synchronism between two closely adjacent guides is abruptly introduced by introducing an overlay with a fast taper. The coupled guides are here sufficiently synchronous and close together that the symmetrical and asymmetrical normal modes of the coupled structure will be excited, each with 1/2 of the input power. Synchronism is then slowly removed by tapering the overlay to zero so that mode 'a' selects arm #1 while mode 'b' selects arm #2. These latter changes are adiabatic, i.e., slow enough tAfter synchronism has been removed, the two arms may be spatially separated to split the power into two directions.