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:
Jul. 01, 1980
Filed:
Mar. 15, 1979
Charles C Ih, Newark, DE (US);
University of Delaware, Newark, DE (US);
Abstract
Method and apparatus for signal transmission via an optical fiber transmission line comprising providing a first substantially monochromatic beam of radiation reserved as a carrier radiation beam, providing a second substantially monochromatic beam of radiation of preselected different frequency than the first substantially monochromatic beam of radiation frequency-interlocked with the first beam of radiation to a preselected degree dependent upon the transmission service to be effected reserved as an information radiation beam, imposing an electrical signal to be transmitted upon the information radiation beam, thereby responsively modulating the information radiation beam, combining the carrier radiation beam and the modulated information radiation beam, transmitting the combined radiation via the optical fiber transmission line to a preselected destination, and detecting the combined radiation with a square law detector to thereby obtain a subcarrier signal constituting the difference in frequency between the carrier radiation beam and the information radiation beam upon which the electrical signal is modulated as the beat frequency of the carrier radiation beam and the modulated information radiation beam, and demodulating to reconstitute the original electrical signal.