2.488 Gb/s-318 km repeaterless transmission using erbium-doped fiber amplifiers in a direct-detection system

Author

Park, Y.K. ; Granlund, S.W. ; Cline, T.W. ; Tzeng, L.D. ; French, J.S. ; Delavaux, J.-M.P. ; Tench, R.E. ; Korotky, S.K. ; Veselka, J.J. ; DiGiovanni, D.J.

Author_Institution

AT&T Bell Labs., Breinigsville, PA, USA

Volume

4

Issue

2

fYear

1992

Firstpage

179

Lastpage

182

Abstract

The authors have achieved a 2.488 Gb/s, 318 km repeaterless transmission without any fiber dispersion penalty through a nondispersion-shifted fiber in a direct detection system. The system was loss limited with a T-R power budget of 57 dB. Three key components enabled the authors to achieve this result: (1) a Ti:LiNbO/sub 3/ external amplitude modulator enabling a dispersion-free transmission, (2) erbium-doped fiber amplifiers increasing the transmitting power to +16 dBm, and (3) an erbium-doped fiber preamplifier enabling a high-receiver sensitivity of -4.1 dBm for 10/sup -9/ BER. To the author´s knowledge, this result is the longest repeaterless transmission span length ever reported for direct detection at this bit rate. From the experimental results and a theoretical model, the authors identified the sources of the receiver sensitivity degradation from the quantum limit (-48.6 dBm) and estimated the practically achievable receiver sensitivity of approximately -44 dBm ( approximately -124 photons/bit) for 2.5 Gb/s optical preamplifier detection.<>

Keywords

erbium; fibre lasers; optical communication equipment; optical links; 2.488 Gbit/s; 2.5 Gbit/s; 318 km; Er doped fibre amplifiers; LiNbO/sub 3/:Ti external amplitude modulator; direct detection system; direct-detection system; dispersion-free transmission; fiber preamplifier; high-receiver sensitivity; loss limited system; nondispersion-shifted fiber; optical preamplifier detection; power budget; quantum limit; receiver sensitivity degradation; repeaterless transmission; span length; transmitting power; Amplitude modulation; Bit error rate; Bit rate; Degradation; Erbium-doped fiber amplifier; Optical receivers; Optical sensors; Preamplifiers; Quantum mechanics; Repeaters;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.122354

Filename

122354