| 1. |
- Rafique, Danish, et al.
(författare)
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Modified Split-Step Fourier Method for Compensation of Nonlinear Fibre Impairments
- 2011
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Ingår i: 13th International Conference on Transparent Optical Networks (ICTON), 2011. - : IEEE conference proceedings. - 9781457708817 ; , s. 1-4
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Konferensbidrag (refereegranskat)abstract
- In this paper, we investigate a modified split-step Fourier method to enable computationally-efficient digital nonlinearity compensation for a coherently-detected 112 Gb/s polarization multiplexed quadrature phase shifted keying transmission over a 1,600 km link (20×80 km) with no inline compensation. We report up to 80% reduction in required stages to perform nonlinear compensation, in comparison to the conventional backpropagation algorithm. This method takes into account the correlation between adjacent symbols at a given instant using a weighted-average approach to enable practical digital nonlinearity compensation.
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| 2. |
- Chen, Jiajia, et al.
(författare)
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Scalable Passive Optical Network Architecture for Reliable Service Delivery
- 2011
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Ingår i: Journal of Optical Communications and Networking. - 1943-0620 .- 1943-0639. ; 3:9, s. 667-673
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Tidskriftsartikel (refereegranskat)abstract
- A scalable and reliable architecture for both a wavelength division multiplexing passive optical network and a hybrid wavelength and time division multiplexing passive optical network with self-healing capability is presented and evaluated. Our protection scheme is compatible with a cascaded arrayed waveguide grating that can accommodate an ultra-large number of end users. A simple interconnection pattern between two adjacent optical network units (ONUs) is applied in order to provide protection for distributed fibers between a remote node and the ONUs. Therefore, the investment cost on a per-user basis can be significantly reduced. Meanwhile, the performance evaluation shows that our approach can achieve high connection availability while maintaining the support of long reach and high splitting ratio.
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| 3. |
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| 4. |
- Chughtai, Mohsan Niaz, et al.
(författare)
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Analysis of Non-Linear Impairments in 40 Gbaud PM DQPSK and D8PSK Transmission
- 2010
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Ingår i: ICTON 2010. - : IEEE Press. - 9781424477982 ; , s. 1 -4
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Konferensbidrag (refereegranskat)abstract
- In this paper, 40 Gbaud transmission of single polarization (SP) and Polarization-Multiplexed (PM), RZ-DQPSK and RZ-D8PSK signals is analyzed numerically. The impact of nonlinear crosstalk arising from the presence of neighbouring intensity-modulated channels is analyzed in terms of required OSNR for the BER of 10-3versus launch power.
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| 5. |
- Chughtai, Mohsan Niaz, et al.
(författare)
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Dependence of non-linear impairments on polarization state and baud rate in WDM systems with mixed DQPSK and OOK channels
- 2011
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Konferensbidrag (refereegranskat)abstract
- In this paper, transmission of Polarization-Multiplexed (PM), RZ-DQPSK is analyzed numerically with copropagation of intensity modulated non return to zero on off keying (NRZ OOK) channels. The dependence of nonlinear crosstalk on baud rate (10 Gbaud, 28 Gbaud and 56 Gbaud) and relative state of polarization (SOPs) of PM RZ DQPSK and neighbouring NRZ OOK channels is analyzed in terms of required OSNR for the BER of 10 -3 versus launch power. From the results we observe that non-linear impairments are highly dependent on relative SOPs and less dependent on baud rates of the PM RZ DQPSK test channel.
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| 6. |
- Duh, Emilija Stojmenova, et al.
(författare)
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Open innovation for delivering digital services with social and economic return on investment on the top of high speed broadband in rural Europe
- 2016
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Ingår i: 2016 International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications (CoBCom). - 9781509022700
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Konferensbidrag (refereegranskat)abstract
- This paper presents a work in progress done within an Interreg Europe project called ERUDITE. The aim of the project is to create a process that enables regional stakeholders across Europe to co-identify and co-design appropriate and innovative digital services on the top of high speed broadband, based on existing needs and a recognition of the social, economic and environmental value that they have the potential to generate to society as a whole.
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| 7. |
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| 8. |
- Forzati, Marco, et al.
(författare)
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40-gb/s field transmission through 540 km ssmf using the aprz modulation format
- 2005
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Ingår i: Optics InfoBase Conference Papers. - : Optical Society of America. - 1557527849 - 9781557527844
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Konferensbidrag (refereegranskat)abstract
- We report the first field transmission experiment using the APRZ modulation format for 40-Gb/s transmission through 540 km SSMF, which confirms the improved nonlinear tolerance of APRZ. The optimum phase-modulation amplitude in this experiment is p/2.
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| 9. |
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| 10. |
- Forzati, Marco, et al.
(författare)
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Asynchronous Phase Modulation for the Suppression of IFWM
- 2007
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Ingår i: IEEE transactions on intelligent transportation systems (Print). - 1524-9050 .- 1558-0016. ; 25, s. 2969-75
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Tidskriftsartikel (refereegranskat)abstract
- Intrachannel four-wave mixing (IFWM) represents main source of impairments in fiber transmission at 40 Gb/s. A number of phase modulation techniques have been proposed to suppress the IFWM. In this paper, we study a cost-effective way of increasing the nonlinear tolerance of a 40-Gb/s wavelength division multiplexing transmission system by asynchronous phase modulation (APM). This can be achieved with one phase modulator placed after the wavelength multiplexer so that cost is shared by all channels. We show, by means of numerical simulations and laboratory experiments, that APM greatly improves the performance of ON-OFF-keying transmission.
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