Impact of Polarization Dependent Loss and Cross-Phase Modulation on Polarization Multiplexed DQPSK Signals

Vassilieva, Olga; Hoshida, Takeshi; Wang, X; Rasmussen, Jens C.; Miyata, H.; Naito, T.

doi:10.1109/ofc.2008.4528545

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…In order to investigate the robustness of the proposed OSNR monitoring technique against different signal pulse shapes, timing phase offsets, PDL and first-order PMD effects, we studied the performance of our proposed OSNR monitor in NRZ-PM-16-QAM and 50% Return-to-Zero (RZ)-PM-16-QAM systems and a fiber link with PDL ranging from 0 to 4 dB (with 0 and 45 angles between signal state of polarization (SOP) and PDL axis) using the distributed PDL model described in [26] and differential group delay (DGD) values ranging from 0 to 20 ps (with 0 , 22.5 and 45 angles between signal SOP and fiber principle states of polarization (PSP)). The timing phases considered include 0, 1/8, 1/4 and 3/8 symbols away from optimal sampling instants at the pulse peaks.…”

Section: Simulation Results For 224 Gb/s Pm-16-qam Systemsmentioning

confidence: 99%

OSNR monitoring for QPSK and 16-QAM systems in presence of fiber nonlinearities for digital coherent receivers

Dong¹,

Lau²,

Lu³

2012

Opt. Express

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OSNR monitoring is indispensable for coherent systems to ensure robust, reliable network operation and potentially enable impairment-aware routing for future dynamic optical networks. In a longhaul transmission link with chromatic dispersion (CD) and fiber nonlinearity, it is difficult to distinguish between amplifier noise and fiber nonlinearity induced distortions from received signal distributions even after various transmission impairment compensation techniques, thus resulting in grossly inaccurate OSNR estimates. Based on the received signal distributions after carrier phase estimation (CPE), we propose to characterize the nonlinearity-induced amplitude noise correlation across neighboring symbols and incorporate such information into error vector magnitude (EVM) calculation to realize fiber nonlinearity-insensitive OSNR monitoring. For a transmission link up to 1600 km and signal launched power up to 2 dBm, experimental results for 112 Gb/s polarization-multiplexed quadrature phase-shift keying (PM-QPSK) demonstrate an OSNR monitoring range of 10-24 dB with a maximum estimation error below 1 dB. For 224 Gb/s PM-16-quadrature amplitude modulation (PM-16-QAM) systems, simulation results demonstrate an OSNR monitoring range of 18-28 dB with a maximum estimation error below 1 dB. Tolerance of the proposed OSNR monitoring technique to different pulse shapes, timing phase offsets, polarization dependent loss (PDL), polarization-mode dispersion (PMD) and WDM effects are also investigated through simulations. ©2012 Optical Society of America

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Section: Simulation Results For 224 Gb/s Pm-16-qam Systemsmentioning

confidence: 99%

OSNR monitoring for QPSK and 16-QAM systems in presence of fiber nonlinearities for digital coherent receivers

Dong¹,

Lau²,

Lu³

2012

Opt. Express

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“…Although PMD can be effectively equalized, PDL is a more challenging impairment for coherent systems [28][29][30][31], particularly for those employing numerous ROADMs. Depending on the relative orientation of the polarization tributaries to the PDL axis, a single PDL element causes a power and/or OSNR difference of the two polarization tributaries and/or non-orthogonality of the (originally orthogonal) polarization tributaries.…”

Section: B Polarization Dependent Lossmentioning

confidence: 99%

A Robust Real-Time 100G Transceiver With Soft-Decision Forward Error Correction [Invited]

Nelson

Zhang

Birk

et al. 2012

J. Opt. Commun. Netw.

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We demonstrate a 120 Gb/s coherent polarizationmultiplexed quadrature-phase-shift-keyed transceiver with soft-decision forward-error-correction (SD-FEC) coding based on Turbo Product Code. This industry-first transceiver module utilizes a 40 nm complementary metal-oxide semiconductor (CMOS) application-specific integrated circuit with integrated analog-to-digital conversion, digital signal processing and SD-FEC, and is packaged according to a multi-source agreement from the Optical Internetworking Forum. Through several long-haul and ultra-long-haul system experiments (over 1000 km to 3760 km), we validate the robustness of the transceiver and demonstrate its high tolerance to various system impairments, including fiber nonlinearity, chromatic dispersion up to 60,000 ps/nm, polarization mode dispersion, polarization-dependent loss, polarization transients and multiple-path interference.

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“…The penalty on channel capacity induced by PDL was evaluated in [6], [7]. In [8], the PDL effect on a lumped channel model was determined, while [9] studied the best and worst cases of this model. This was extended in [10], for both lumped and distributed channel models, for worst, best, and average alignment between the signal and PDL.…”

Section: Introductionmentioning

confidence: 99%

“…This was extended in [10], for both lumped and distributed channel models, for worst, best, and average alignment between the signal and PDL. In [8], [10], it was shown that the lumped model is not precise since it does not consider the effect of PDL on noise. Finally, in [11], the effect of PDL combined with nonlinear effects was studied.…”

Section: Introductionmentioning

confidence: 99%

The impact of polarization-dependent loss on the constant modulus algorithm for varying number of fiber spans based on an outage criterion

Tavan

Wymeersch

2011

2011 20th Annual Wireless and Optical Communications Conference (WOCC)

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Abstract-We investigate the effect of polarization-dependent loss (PDL) on the constant modulus algorithm (CMA) in 4-QAM and 16-QAM polarization multiplexed (PolMux) systems with varying number of fiber spans and different PDL values. To quantify this effect, outage probability is introduced as the probability of having a signal-to-noise ratio (SNR) degradation smaller than 1 dB 99% of the time. We observe that by increasing the number of fiber spans, the SNR penalty for CMA reaches a limiting value. Moreover, in the 16-QAM multi-span case, the effect of PDL on CMA depends on the amount of PDL, while for 4-QAM, the effect of PDL on CMA is insensitive to the amount of PDL. These results will provide guidelines for designing systems and adjusting transmission power.

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Impact of Polarization Dependent Loss and Cross-Phase Modulation on Polarization Multiplexed DQPSK Signals

Cited by 9 publications

References 3 publications

OSNR monitoring for QPSK and 16-QAM systems in presence of fiber nonlinearities for digital coherent receivers

OSNR monitoring for QPSK and 16-QAM systems in presence of fiber nonlinearities for digital coherent receivers

A Robust Real-Time 100G Transceiver With Soft-Decision Forward Error Correction [Invited]

The impact of polarization-dependent loss on the constant modulus algorithm for varying number of fiber spans based on an outage criterion

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