Noise reduction in 2R-regeneration technique utilizing self-phase modulation and filtering

Nguyen, Thanh Nam; Bramerie, Laurent; Chartier, Thierry; Simon, Jean‐Claude; Joindot, Michel

doi:10.1364/oe.14.001737

Cited by 38 publications

(23 citation statements)

References 8 publications

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“…An optical bandpass filter (OBPF), centred at the signal wavelength λ 0 and characterized by its spectral full-width at half maximum (FWHM) δ f 1 is also used to reduce the ASE noise power [16]. A spectral broadening is then achieved through the SPM effect occuring during the propagation in a highly non-linear optical fiber (HNLF) with a length L. The broadened spectrum is finally partially sliced by a second OBPF shifted by ∆λ.…”

Section: Principle and Set-upmentioning

confidence: 99%

“…Mamyshev. Many works, both experimental [7][8][9][10][11][12][13] and theoretical [9,11,[14][15][16][17][18][19], have dealt with the possibilities of such a device known as the Mamyshev regenerator. For example, its capacity of multi-wavelength regeneration [8,17], the existence of eigen-pulses in concatenated regenerators [19] or its inclusion in a set-up compatible with DPSK signals [20] have been recently reported.…”

Section: Introductionmentioning

confidence: 99%

“…[14], general theoretical guidelines have been proposed to design a highperformances single-stage regenerator with a transfer function exhibiting both a high extinction ratio improvement and a locally flat region on the one-level called the plateau. In an other numerical study, the authors have tried to link the properties of the transfer function with the performances of the regenerator in terms of Q-factor improvement [16]. The authors have noticed that the transfer function itself is not sufficient to fix the working power giving the best performance and that a trade-off between the improvements and impairments raised by the regenerator is then necessary.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical study of an optical regenerator exploiting self-phase modulation and spectral offset filtering at 40Gbit/s

Finot

Nguyen

Fatome

et al. 2008

Optics Communications

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:In this work, we numerically investigate the performances of optical regenerators based on self-phase modulation and spectral offset filtering at 40 Gbit/s. We outline the different effects affecting the device performances and explain the choice of the optimal working power. The impact of the regenerator on the output signal is also analysed through a statistical approach. Both single and double stage configurations are investigated.

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Section: Principle and Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical study of an optical regenerator exploiting self-phase modulation and spectral offset filtering at 40Gbit/s

Finot

Nguyen

Fatome

et al. 2008

Optics Communications

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“…This is useful in categorising a range of SBF regenerators since those that share the same ratio are likely to display the same regeneration capabilities. When considering noise introduced by amplifiers in an optical link, it has been shown that the inclusion of the ASE-rejection filter within the SBF regenerator is vital (Nguyen et al 2006), with no improvement in Q-factor unless a filter is included after the amplifier. The filter serves to reduce the noise power over the pass-band of the offset filter, leading to an increase in the optical signal to noise ratio.…”

Section: All-optical Regeneration/buffermentioning

confidence: 99%

Signal Processing, Management and Monitoring in Transmission Networks

Vázquez

Montalvo

Ahmed

et al. 2011

Optical Transmission

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1higher, linear and non-linear fibre impairments become prominent factors affecting the signal quality. Thus, new techniques in both physical layer and network layer are necessary for mitigating impairments to accommodate high-speed traffic (Tomkos et al. 2002). On the other hand, the flexibility of modern networks with dynamic and distributed management, where lightpaths can be dynamically and automatically assigned end-to-end, increases the risk of changing path conditions that affect signal quality and consequently quality of service (QoS) over the lifetime of a connection as well as for subsequent connection set-up requests (on-demand routing and wavelength assignment -RWA). For traditional connection provisioning an ideal physical layer, ignoring transmission impairments (Chlamtac et al. 1992) could be assumed because the implicit per hop regeneration (optics-to-electronics-to-optics conversion -O/E/O) compensated signal impairments hop-by-hop in a rather static manner (section commissioning). For end-to-end all-optically switched connections using photonic cross-connect switches (PXC), the conditions change and common practice is not applicable. Anyhow, intelligent connection provisioning is an important traffic engineering problem, and minimising operational cost as well as efficiently utilising network resources is the main driver. In this context, it seems important to have flexible routing protocols that take into consideration the most relevant physical impairments, and are able to exchange messages with their values as part of the route information with others. This condition, if definitely used to calculate routing, will surely assure better success in data delivery over the network (Huang et al. 2005). Irrespective of the control architecture chosen by an operator of an optical network, the included control plane (in charge of setting up and tearing down optical circuits; also known as lightpaths) needs to have a proper set of tools to satisfyingly deal with physical impairments. The most essential tools are: optical signal monitoring, signal processing and impairment compensation techniques (each all-optically and/or electrically). With the help of these tools, it is possible to predict the QoT (quality of transmission) attainable for a lightpath at a given time (i.e. the latest network-wide monitoring instant), and the control plane can route requests across the network

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“…This important building block of future high-speed optical grooming switches 3) can be achieved by using various optical methods taking advantage of the instantaneous Kerr non-linear response of optical fibers : non-linear optical loop mirrors (NOLMs) 4,5) , four-wave mixing 6) , or self-phase modulation (SPM) in normally 7) or anomalous 8,9) dispersive fibers (the two latest methods being known as "Mamyshev" (MR) and "spectrally filtered solitons" respectively). Thanks to its ability to simultaneously improve '0' and '1' bits of signal in a rather simple experimental scheme, MR technique has stimulated a large amount of works, both theoretical [10][11][12][13][14][15][16][17][18][19] and experimental 7,12,16,[19][20][21][22] .…”

Section: Introductionmentioning

confidence: 99%