Fiber Optic Analog--Digital Hybrid Signal Transmission Employing Frequency Modulation

Author

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

Author_Institution

NTT Public Corp., Japan

Volume

33

Issue

5

fYear

1985

fDate

5/1/1985 12:00:00 AM

Firstpage

433

Lastpage

441

Abstract

Investigations are carried out on the SNR performance in fiber optic FM transmission systems which use multimode fibers and 1.3 μm laser diodes. Both laser diode noise and modal noise are quantitatively evaluated in systems with and without employing a superimposed pulse modulation scheme. Based on these investigations, parameters for analog-digital hybrid signal transmission systems employing FM are determined. The hybrid signal consists of audio, video, and 2 Mbit/s digital data. The results obtained in transmission experiments satisfied the design objectives and confirmed the technical feasibility of an analog-digital hybrid transmission employing FM. The obtained results make the fiber optic FM transmission system with a 1.3 $\\mu m$ LD an attractive alternative in subscriber systems, and video transmission systems for microwave IF links and CATV trunks.

Keywords

FM; Optical fiber communication; Analog-digital conversion; Degradation; Diode lasers; Fiber lasers; Frequency modulation; Laser modes; Laser noise; Optical fibers; Optical noise; Signal to noise ratio;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1985.1096326

Filename

1096326