Noncoherent detection of coherent lightwave signals corrupted by phase noise

Foschini, G.J.; Greenstein, L.J.; Vannucci, G.

doi:10.1109/26.1456

Cited by 205 publications

(113 citation statements)

References 18 publications

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“…The spectral broadening effect of phase noise is overemphasized by forcing these filters to pass the signals undistorted, while the effect of additive noise is underemphasized. It is well understood today that the niondistortion afforded by wideband filters is not necessary for good performance in the presence of phase noise [2,3,4]. An interesting example occurs in the floor performance of DPSK modulation where a narrowband receiver outperforms a wideband receiver even when the additive noise is neglected [13].…”

Section: Discussionmentioning

confidence: 99%

“…wide deviation FSK, with envelope detection. This is because an equivalent receiver will take the filter outputs yl(t) and y 2 (t), form (yl(t) + y 2 (t)) 2 and (yl(t)-y2(t)) 2 , perform lowpass filtering (integration) on these signals in the case of a double filter receiver, and decide for the larger of the sampled values. The signal component of one of the waveforms formed will be zero when the powers are equal.…”

Section: Discussionmentioning

confidence: 99%

“…al. [2,14] and many others [3,15,16,17,18]. It makes a time-domain analysis with random signals tractable.…”

Section: Reference Transmission With Optimal Signal and Receiver Paramentioning

confidence: 99%

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Reference transmission schemes for phase noise immunity

Azizoglu

Humblet

1995

IEEE Trans. Commun.

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We consider an optical communication system where a reference signal is transmitted along with a phase modulated information carrying signal. This system has the potential of alleviating the effect of phase noise considerably. We jointly optimize the bandwidth of the receiver and the powers of the two signals. The scheme achieves a performance that is close to that of ideal phase modulation systems when the ratio of bit rate to laser linewidth is large, and a performance that is identical to that of frequency modulation when the ratio is small. We also introduce a centered filter structure which achieves a far better performance than traditional filters due to increased the phase coherence.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Reference transmission schemes for phase noise immunity

Azizoglu

Humblet

1995

IEEE Trans. Commun.

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“…Usually, a low-pass filter (LPF) is used after the photodiode in the DPSK label receiver. We specify the postdetection LPF to be a finite-time integrator with integration time T [22]. If the receiver transimpedance is Z 0 , the output voltage from the filter at decision time T can be written as…”

Section: A Single-ended Receivermentioning

confidence: 99%

Improve the performance of orthogonal ASK/DPSK optical label switching by DC-balanced line encoding

Chi

Zhang

et al. 2006

J. Lightwave Technol.

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Abstract-Orthogonal amplitude shift keying/differential phase-shift keying (ASK/DPSK) labeling is a promising approach to ultrahigh packet-rate routing and forwarding in the optical layer. However, the limitation on the payload extinction ratio (ER) is a detrimental effect for network scalability and transparency. This paper presents theoretical and experimental studies of ASK/ DPSK labeling. It proposes that dc-balanced 8B10B coding can greatly improve ER tolerance, which in turn leads to better system performance. By using the 8B10B coding method, the paper demonstrates transmission and optical label swapping for a 40 Gb/s ASK payload and a 2.5 Gb/s DPSK label with an overall power penalty of 3.3 dB for the payload and 0.3 dB for the label. The experimental results also show that the ER is allowed to be as high as 12 dB.Index Terms-Amplitude shift keying, differential phase shift keying, optical label switching, orthogonal modulation.

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“…Phase noise is also present in the signal, as a result of phase fluctuations in the transmit and local oscillator lasers. It is usually characterized as a Wiener process, φ(t) t 0φ (τ )dτ , where the time derivativeφ(t) is a zero-mean white Gaussian process with a power spectral density Sφ(ω) = 2π∆v ( [16]- [18]), and ∆v is defined as the laser linewidth parameter. Lasers diodes with ∆v ≈ 1 − 5 MHz are available today.…”

Section: Channel and Receiver Descriptionmentioning

confidence: 99%

Adaptive digital equalization in the presence of chromatic dispersion, PMD, and phase noise in coherent fiber optic systems

Crivelli

Carter

Hueda

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.

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Abstract-Chromatic dispersion (CD) and polarization mode dispersion (PMD) severely limit the performance of optical transmission systems operating at data rates of 10 Gb/s and beyond. Electrical equalization techniques have been proposed to compensate dispersion in both coherent and intensity modulation/directdetection (IM/DD) systems. The former benefit from the fact that a complete compensation with zero penalty is possible, at least in principle, whereas in the latter the loss of phase information caused by the direct detection process results in a nonzero dispersion penalty even when optimal equalizers are used. In this paper, we investigate the combined adaptive digital equalization of all-order PMD, CD, and laser phase noise in highspeed coherent optical transmission systems. Although electrical equalization in coherent optical transmission systems has been addressed by previous literature [1]-[3], equalization of the combined effects of CD, PMD, and laser phase noise has not been reported so far. Simultaneous equalization of these impairments is particularly important in modulation systems that exploit polarization to increase the modulation efficiency, such as the joint polarization modulation and M-ary differential phase shift keying (JPMDPSK) system described in [4]. We propose a novel 4-dimensional equalizer structure for JPMDPSK systems. The specific example considered in this paper is 40 Gb/s transmission with a 10 GBaud symbol rate, using DQPSK modulation on each axis of polarization. Our results show that the new fourdimensional equalizer can compensate channel dispersion of up to 1000 km of standard single-mode fiber, with less than 3 dB penalty in signal to noise ratio (SNR). This is a dramatic improvement over 40 Gb/s IM/DD systems, even when they use electrical [5] or optical [6] equalization. The feasibility of the very large scale integration (VLSI) of coherent receivers in current technology is also discussed.

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Noncoherent detection of coherent lightwave signals corrupted by phase noise

Cited by 205 publications

References 18 publications

Reference transmission schemes for phase noise immunity

Reference transmission schemes for phase noise immunity

Improve the performance of orthogonal ASK/DPSK optical label switching by DC-balanced line encoding

Adaptive digital equalization in the presence of chromatic dispersion, PMD, and phase noise in coherent fiber optic systems

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