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:
Mar. 13, 1984
Filed:
Mar. 29, 1982
James H Cole, Great Falls, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A test signal waveform detector that includes a fiber optic interferometer wherein the phase difference of the two parts of a split laser beam is modulated by the waveform of a sinusoidal test signal which is to be detected and by the waveform of a sinusoidal reference signal, and the two parts of the split beam are recombined and mixed on the face of a photodetector. A signal conversion circuit converts the ac signal produced by the photodetector to another ac signal that carries the test signal information as an equivalent frequency modulation, and a demodulator extracts the test signal information from the latter ac signal.