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:
Feb. 13, 1990
Filed:
Dec. 30, 1988
Ronald F Mathis, Romona, CA (US);
General Dynamics Corporation, Electronics Division, San Diego, CA (US);
Abstract
A multiple pole optical bandpass filter comprises at least two input filter elements each having an input at one end and an output at the opposite end, and an output filter element having at least two inputs at one end coupled to the respective outputs of the input filter elements, and an output at the opposite end. Each of the filter elements comprises a segment of multimode optical fiber of predetermined length having mirrors at its opposite input and output ends. An intensity modulated light signal is provided at one of the input filter element inputs, while the same signal shifted by 180 degrees is provided at the other input filter element input.