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On the Q factor inaccuracy in the performance analysis of optical direct-detection DPSK systems

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2 Author(s)
Bosco, G. ; Dipt. di Elettronica, Politecono di Torino, Italy ; Poggiolini, P.

In this letter, we analyze the validity of the use of the Q parameter evaluation in the study of the bit-error-rate (BER) performance of direct-detection differential phase-shift keying optical systems. We show that the inaccuracy of the estimate of the BER based on the Q factor can be very large.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 2 )