Accession Number:

ADD010794

Title:

Fiber Optic System for Transmission of Video-Signals by Pulse-Frequency-Modulation.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1983-08-16

Pagination or Media Count:

10.0

Abstract:

A fiber optic system utilizing pulse-frequency modulation PFM for transmission of video information signals substantially enhances the signal-to-noise ratio of the transmitted video signals. FM processing gain is realized together with system noise reduction which results from operation of the fiber optic components in a pulsed mode. The amplitude of a video signal modulates the repetition frequency of a stream of narrow transmitted through a low loss, wideband optical fiber to an avalanche photodiode biased at an optimum gain point. Further improvement is possible when preemphasis processing of the video signal is performed prior to transmission. Author

Subject Categories:

  • Lasers and Masers
  • Fiber Optics and Integrated Optics
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE