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- W2172742783 abstract "A detailed theoretical analysis is given for the impact of finite frequency deviation on the sensitivity of dual-filter heterodyne frequency shift keying (FSK) lightwave systems. Our analysis provides closed-form signal-to-noise ratio (SNR) results for estimating the bit-error- ratio (BER) performance of the system. These closed-form results provide an insight into the impact of finite frequency deviation 2(Delta) f<SUB>d</SUB>, laser linewidth (Delta) (nu) , bit rate R<SUB>b</SUB>, and IF filter bandwidths on the system performance. Simulation results indicate that the accuracy of the approximate theory presented in this paper is within 1 dB for linewidths up to 22% when BER equals 10<SUP>-9</SUP>. It is shown that there is a well-defined relationship between the choice of frequency deviation and the tolerable amount of laser phase noise. When there is no phase noise, a frequency deviation of 2(Delta) f<SUB>d</SUB> equals 0.72 R<SUB>b</SUB> is sufficient for 1 dB sensitivity penalty with respect to infinite frequency deviation case; whereas for a linewidth of (Delta) (nu) equals 0.50 R<SUB>b</SUB> the required frequency deviation increases to 2(Delta) f<SUB>d</SUB> equals 3.42 R<SUB>b</SUB> for the same sensitivity penalty. The sensitivity degradation can be very severe for a fixed linewidth as the frequency deviation gets smaller: for a linewidth of 20% the sensitivity penalty is only 0.54 dB when the frequency deviation is infinite whereas it is 3.48 dB when the frequency deviation is 2(Delta) f<SUB>d</SUB> equals R<SUB>b</SUB>." @default.
- W2172742783 created "2016-06-24" @default.
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- W2172742783 date "1992-12-17" @default.
- W2172742783 modified "2023-10-01" @default.
- W2172742783 title "<title>Impact of finite frequency deviation on the performance of dual-filter heterodyne FSK lightwave systems</title>" @default.
- W2172742783 doi "https://doi.org/10.1117/12.139331" @default.
- W2172742783 hasPublicationYear "1992" @default.
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