Fiber Optic Video Transmission Employing Square Wave Frequency Modulation

Author

Sato, Ken-Ichi ; Aoyagi, Shinichi ; Kitami, Tokuhiro

Author_Institution

NTT Public Corp., Japan

Volume

33

Issue

5

fYear

1985

fDate

5/1/1985 12:00:00 AM

Firstpage

417

Lastpage

424

Abstract

Investigations are carried out on the performance of video transmission systems employing square wave frequency modulation (SWFM). A simple formula for the signal-to-noise ratio (SNR) in the SWFM video transmission systems is derived. The SNR performance is compared to that of frequency modulation (FM) and pulse frequency modulation (PFM). SWFM is shown to display the greatest receiver sensitivity when the fiber 6 dB bandwidth is less than 100 MHz. Video transmission experiments demonstrate the advantages of the SWFM, including 1) degree of simplicity in modulation/demodulation circuits as well as in optical transmitter and receiver circuits, 2) tolerance to nonlinearities in the system, and 3) insensitivity to the fiber baseband frequency-phase characteristics. Both the theoretical and experimental results have made clear the superiority of SWFM optical video transmission systems in application to CATV distribution systems and subscriber loop systems.

Keywords

FM; Image communication; Optical fiber communication; Bandwidth; Circuits; Displays; Frequency modulation; Optical fibers; Optical pulses; Optical receivers; Optical transmitters; Pulse modulation; Signal to noise ratio;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1985.1096311

Filename

1096311