[PDF]    http://dx.doi.org/10.3952/lithjphys.45104

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 45, 33–36 (2005)


ULTIMATE SPECTRAL EFFICIENCY OF INFORMATION TRANSMISSION OF FIBRE AMPLIFIERS IN WDM SYSTEMS
M.A. Khodasevicha, G.V. Sinitsyna, Yu.A. Varaksaa, and A.S. Yasukevichb
aInstitute of Physics, National Academy of Sciences of Belarus, Kuprevich Str. 1, 220141 Minsk, Republic of Belarus
E-mail: mike@optoinform.bas-net.by
bInternational Laser Centre, BNTU, F. Skaryna Ave. 65, 220013 Minsk, Republic of Belarus
E-mail: anatol@ilc.by

Received 29 October 2004

Numerical modelling of ultimate spectral efficiency of information transmission in wavelength-division multiplexing (WDM) systems is carried out for the case when the noise of optical fibre amplifiers determines the system capacity. The number-state model is used for finding spectral efficiency of communication lines with erbium-doped (EDFA) and chromium-doped fibre amplifiers (CDFA). The results obtained show that spectral efficiency of CDFA exceeds that of EDFA throughout the conventional band and approaches the “quantum limit” in a window of transparency of advanced fibres in the high pump power limit. The ultimate capacity of communication systems with CDFA is estimated to be about 300 Tbit/s.
Keywords: erbium-doped fibre amplifier, spectral efficiency, ultimate capacity
PACS: 42.60.Da, 42.60.Lh, 42.81.Wg


MAKSIMALUS PLUOŠTINIŲ STIPRINTUVŲ INFORMACIJOS PERDAVIMO SPEKTRINIS NAŠUMAS MULTIPLEKSINĖSE SISTEMOSE
M.A. Khodasevicha, G.V. Sinitsyna, Yu.A. Varaksaa, A.S. Yasukevichb
aFizikos institutas, Minskas, Baltarusija
bTarptautinis lazerių centras, Minskas, Baltarusija

Skaitmeniškai sumodeliuotas informacijos perdavimo multipleksinėse (WDM) sistemose maksimalus spektrinis našumas, kai optinis pluoštinis stiprintuvas nulemia sistemos pralaidumą. Nagrinėtos ryšių linijos, į kurias įjungti pluoštiniai stiprintuvai su chromo arba erbio priemaišomis. Rasta, kad įprastinėje juostoje stiprintuvų su chromo priemaišomis spektrinis našumas yra didesnis už stiprintuvų su erbio priemaišomis spektrinį našumą, o taikant aukštos galios kaupinimą jis priartėja prie taip vadinamosios kvantinės ribos. Minėtųjų sistemų maksimalus pralaidumas įvertintas 300 Tbit/s.


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