Abstract

The assessment of the power penalty of optically preamplified receivers with signal-dependent noise (SDN) dominance is often accomplished by neglecting the influence of the optical filtering of the amplified spontaneous emission (ASE) noise on the signal-ASE beat noise. In this paper, it is shown that the optical filtering of the ASE noise can have a strong impact on the signal-ASE beat noise and remarkably affect the power penalty, even for optical filter bandwidths five times wider than the signal bandwidth. A simple expression to analytically evaluate the power penalty due to optical filtering, which describes reasonably well the influence of the optical filter on the signal-ASE beat noise variance, is proposed. The accuracy of the new expression is investigated, in the case of assessment of optical filter detuning impact on receiver performance and the case of optical filter bandwidth optimization, and its predictions are satisfactory in comparison with rigorous estimates. Two new expressions of power penalty due to extinction ratio and to eye closure are also presented. It is shown that the power penalty due to eye closure depends on the extinction ratio and vice versa. Our results show also that the power penalty due to eye closure is remarkably dependent on the eye closure asymmetry.

[IEEE ]

In-band crosstalk penalties in optical networks with narrow optical and electric filtering

Rui Meleiro, Jorge Castro, Daniel Fonseca, Paulo André, and Paulo Monteiro
Opt. Express 17(6) 4605-4610 (2009)

Noise statistics in optically preamplified differential phase-shift keying receivers with Mach–Zehnder interferometer demodulation

Xiupu Zhang, Guodong Zhang, Chongjin Xie, and Lei Wang
Opt. Lett. 29(4) 337-339 (2004)

Quantum limit of optimum four-level ASK signals with direct detection optically preamplified receivers

Wei-Ren Peng and Sien Chi
Opt. Express 15(11) 6790-6797 (2007)

Digital coherent receiver based transmitter penalty characterization

David J. Geisler and John E. Kaufmann
Opt. Express 24(26) 29734-29748 (2016)

Bit Error Probability Evaluation in Optically Preamplified Direct-Detection OFDM Systems Using the Moment Generating Function

João L. Rebola and Adolfo V. T. Cartaxo
J. Opt. Commun. Netw. 4(3) 229-237 (2012)