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Sensitivity of direct-detection lightwave receivers using optical preamplifiers

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2 Author(s)
Kazovsky, Leonid G. ; Dept. of Electr. Eng., Stanford Univ., CA, USA ; Tonguz, O.K.

A simple technique for analyzing the sensitivity and bit-error-rate (BER) performance of direct-detection lightwave receivers using optical preamplifiers is presented. The analysis provides closed-form expressions for the system performance and includes the impact of phase noise. For a negligible linewidth, the theory predicts an average signal energy of 42.3 photons/bit at a BER of 10/sup -9/. For comparison, a more accurate analysis predicts an average signal energy of 38 photons/bit under the same conditions.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:3 ,  Issue: 1 )