| 1. |
- Alfredsson, Arni, 1989, et al.
(författare)
-
Phase-Noise Compensation for Spatial-Division Multiplexed Transmission
- 2017
-
Ingår i: Optics InfoBase Conference Papers. - 2162-2701.
-
Konferensbidrag (refereegranskat)abstract
- The problem of correlated phase noise in spatial-division multiplexed transmission is studied. To compensate for the phase noise, an algorithm for joint-core phase-noise estimation and symbol detection is proposed, which outperforms conventional methods.
|
|
| 2. |
- Alfredsson, Arni, 1989, et al.
(författare)
-
Pilot Distributions for Phase Tracking in Space-Division Multiplexed Systems
- 2017
-
Ingår i: European Conference on Optical Communication, ECOC.
-
Konferensbidrag (refereegranskat)abstract
- Several pilot distributions are compared for pilot-aided joint-core phase tracking in space-division multiplexed transmission affected by correlated phase noise. Results show that the best choice of distribution can reduce the bit error rate by a factor up to 170.
|
|
| 3. |
- Czegledi, Cristian Bogdan, 1988, et al.
(författare)
-
Digital backpropagation accounting for polarization-mode dispersion
- 2017
-
Ingår i: Optics Express. - 1094-4087 .- 1094-4087. ; 25:3, s. 1903-1915
-
Tidskriftsartikel (refereegranskat)abstract
- Digital backpropagation (DBP) is a promising digital-domain technique to mitigate Kerr-induced nonlinear interference. While it successfully removes deterministic signal-signal interactions, the performance of ideal DBP is limited by stochastic effects, such as polarizationmode dispersion (PMD). In this paper, we consider an ideal full-field DBP implementation and modify it to additionally account for PMD; reversing the PMD effects in the backward propagation by passing the reverse propagated signal also through PMD sections, which concatenated equal the inverse of the PMD in the forward propagation. These PMD sections are calculated analytically at the receiver based on the total accumulated PMD of the link estimated from channel equalizers. Numerical simulations show that, accounting for nonlinear polarization-related interactions in the modified DBP algorithm, additional signal-to-noise ratio gains of 1.1 dB are obtained for transmission over 1000 km.
|
|
| 4. |
- Czegledi, Cristian Bogdan, 1988, et al.
(författare)
-
Modified Digital Backpropagation Accounting for Polarization-Mode Dispersion
- 2017
-
Ingår i: Optical Fiber Communication Conference. - 9781943580231
-
Konferensbidrag (refereegranskat)abstract
- We propose a modified DBP algorithm accounting for PMD. The accumulated PMD at the receiver is factorized into several PMD sections, and inserted into the DBP routine to distributively compensate for PMD, outperforming the conventional approach by 1.1 dB in SNR.
|
|
| 5. |
- Czegledi, Cristian Bogdan, 1988, et al.
(författare)
-
Temporal stochastic channel model for absolute polarization state and polarization-mode dispersion
- 2017
-
Ingår i: 2017 Optical Fiber Communications Conference and Exhibition, OFC 2017 - Proceedings. - 2162-2701. - 9781943580231
-
Konferensbidrag (refereegranskat)abstract
- We propose and validate a discrete-time channel model for the temporal drift of the absolute polarization state and polarization-mode dispersion for coherent fiber optic systems. The model can be used in simulations to test and develop DSP for coherent receivers.
|
|
| 6. |
- Dharmaweera, Madushanka Nishan, 1986, et al.
(författare)
-
An impairment-aware resource allocation scheme for dynamic elastic optical networks
- 2017
-
Ingår i: Optics InfoBase Conference Papers. - 2162-2701. - 9781943580231 ; Part F40
-
Konferensbidrag (refereegranskat)abstract
- By using impairment-driven variable guardbands, our proposed dynamic resource allocation scheme accommodates 50% more traffic in comparison to existing fixed transmission-reach- and guardband-based algorithms.
|
|
| 7. |
|
|
| 8. |
|
|
| 9. |
- Fougstedt, Christoffer, 1990, et al.
(författare)
-
Time-Domain Digital Back Propagation: Algorithm and Finite-Precision Implementation Aspects
- 2017
-
Ingår i: Optics InfoBase Conference Papers. - 2162-2701. - 9781943580231 ; , s. Article no 7937325-
-
Konferensbidrag (refereegranskat)abstract
- We propose a nonlinear mitigation algorithm designed from an ASIC perspective, and analyze implementation aspects. Given 9 signal and 11 coefficient bits, reach is increased by 105% compared to linear compensation in single-channel 16-QAM transmission.
|
|
| 10. |
- Gao, J. T., et al.
(författare)
-
Theoretical Investigation of Longitudinal Dispersion Fluctuations on All-Fiber Phase-Sensitive Parametric Optical Switch
- 2017
-
Ingår i: Journal of Lightwave Technology. - : Institute of Electrical and Electronics Engineers (IEEE). - 0733-8724 .- 1558-2213. ; 35:9, s. 1646-1653
-
Tidskriftsartikel (refereegranskat)abstract
- A fiber-based all-optical switch accomplished by pump depletion in a single-pump phase sensitive (PS) amplifier is theoretically investigated using an inhomogeneous fiber model including the zero-dispersion wavelength (ZDW) fluctuations. We find that the OFF-state (maximum pump depletion) of the PS all-optical switch is very sensitive to the ZDW fluctuations, whereas the ON-state (minimum pump depletion) is more robust. Meanwhile, the nonreciprocal transmission characteristic of the PS all-optical switch induced by the ZDW fluctuations is investigated with the help of the proposed inhomogeneous fiber model. Our theoretical results are useful to optimize the experimental implementation of PS all-optical switch.
|
|
