All-Optical Conversion From RZ to NRZ Using Gain-Clamped SOA

Silveira, T.; Teixeira, A.; Beleffi, G. Tosi; Forin, D.; Monteiro, Paulo P.; Furukawa, Hideaki; Wada, Naoya

doi:10.1109/lpt.2007.891643

Cited by 18 publications

(6 citation statements)

References 8 publications

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“…When the label bits are modulated in RZ format, the set and reset pulse-widths (for instance, 10 ps in bit rate of 40 Gbit/s) may be insufficient for driving (switching) the flip-flops. Pulsewidth conversion [17] and RZ to NRZ conversion [18] are two of the techniques proposed for all-optical pulse broadening.…”

Section: ) Adaptive Wavelength Selectionmentioning

confidence: 99%

Optical-Logic-Gate Aided Packet-Switching in Transparent Optical Networks

Teimoori

Apostolopoulos

Vlachos

et al. 2008

J. Lightwave Technol.

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Abstract-The objective of this research is to propose two new optical procedures for packet routing and forwarding in the framework of transparent optical networks. The single-wavelength label-recognition and packet-forwarding unit, which represents the central physical constituent of the switching node, is fully described in both cases. The first architecture is a hybrid opto-electronic structure relying on an optical serial-toparallel converter designed to slow down the label processing. The remaining switching operations are done electronically. The routing system remains transparent for the packet payloads. The second architecture is an all-optical architecture and is based on the implementation of all-optical decoding of the parallelized label. The packet-forwarding operations are done optically. The major subsystems required in both of the proposed architectures are described on the basis of nonlinear effects in semiconductor optical amplifiers. The experimental results are compatible with the integration of the whole architecture. Those subsystems are a 4-bit time-to-wavelength converter, a pulse extraction circuit, a an optical wavelength generator, a 3 8 all-optical decoder and a packet envelope detector.Index Terms-Optical header processing, optical logic gate, optical packet switching, semiconductor optical amplifier (SOA), transparent optical network.

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Section: ) Adaptive Wavelength Selectionmentioning

confidence: 99%

Optical-Logic-Gate Aided Packet-Switching in Transparent Optical Networks

Teimoori

Apostolopoulos

Vlachos

et al. 2008

J. Lightwave Technol.

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“…This means that, when signal power is injected in the GC-SOA, the internal laser power will vary inversely in order to maintain a constant cavity gain. When the input signal power exceeds a threshold value, the internal laser is shut down and the GC-SOA operates similarly a common SOA [4]. The simulated optical gain of a GC-SOA and of a common SOA are compared in Figure Ic.…”

Section: Soamentioning

confidence: 99%

“…GC-SOA are attractive devices for all-optical signal processing due to several characteristics. Due to the presence of an internal laser, faster response is expected [3]; the non-linear interactions occurring between the input signal, the free carriers and the internal laser have been exploited for wavelength conversion, reshaping and format conversion [4,5]; the gain independence on the injection current is explored to obtain a regenerator with a true regeneration characteristic [6]. The linear gain curve has been exploited for all-optical WDM switching.…”

Section: Introductionmentioning

confidence: 99%

All-Optical Signal Processing Using Gain Clamped Semiconductor Optical Amplifiers

Silveira

Teixeira

Ferreira

et al. 2007

2007 9th International Conference on Transparent Optical Networks

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All optical signal processing is a key functionality to ensure the operation and growth of wavelength division multiplexing (WDM) networks. In this work we present a review of nonlinear applications of gain clamped semiconductor optical amplifiers (GC-SOA). An overview on recent results of wavelength conversion, signal reshaping, format conversion, and regeneration capabilities is presented; these results demonstrate promising characteristics of GC-SOA based schemes to enable transparent optical networks.

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“…7 However, few simultaneous format conversion and wavelength conversion technologies have been reported so far. 8,9 In this work, we demonstrate a novel all-optical format conversion and wavelength conversion based on crossabsorption modulation ͑XAM͒ effect in an electroabsorption modulator ͑EAM͒. Compared with the complex structure of the reference, 4 this scheme only needs an EAM without OEO conversion.…”

Section: Introductionmentioning

confidence: 98%

All-optical nonreturn-to-zero to return-to-zero format conversion with wavelength conversion using an electroabsorption modulator

Chen

et al. 2007

Opt. Eng

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Abstract. Simultaneous all-optical nonreturn-to-zero ͑NRZ͒ to return-to-zero ͑RZ͒ format conversion and wavelength conversion in an electroabsorption modulator ͑EAM͒ based on cross-absorption modulation ͑XAM͒ at 10 Gbit/ s is demonstrated. The impact of the bias voltage of EAM and the input NRZ data signal power on the performance of converted RZ signals is studied. The maximum extinction ratio ͑ER͒ of converted RZ signals is about 12.08 dB. By tuning the wavelength of input NRZ signals from 1550 to 1570 nm, negative power penalty with a range of −0.9 to −0.2 dB is observed for converted RZ signals. Thus, error-free alloptical simultaneous format and wavelength conversion using EAM is reported, in a setup that has not been demonstrated in the past.

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All-Optical Conversion From RZ to NRZ Using Gain-Clamped SOA

Cited by 18 publications

References 8 publications

Optical-Logic-Gate Aided Packet-Switching in Transparent Optical Networks

Optical-Logic-Gate Aided Packet-Switching in Transparent Optical Networks

All-Optical Signal Processing Using Gain Clamped Semiconductor Optical Amplifiers

All-optical nonreturn-to-zero to return-to-zero format conversion with wavelength conversion using an electroabsorption modulator

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